Polyurethanes & Foams

Sub-Category: Chemsitry | Flexible Polyurethanes | Insultation | Plastics Packaging | Quality Control | Rigid Polyurethanes | Troubleshooting

October 2021

Fire Resistant Polyisocyanurates (PIR) and Polyurethanes (MasterClass) [Brochure]
Date: 13 October 2021 (Wednesday)
Time: 2.00 pm (UK) , ~360 Min
Expert: Dr. Grazyna Mitchener
Language: English
Brochure: [Brochure]
Code: BuffPack
Format: Live
ID: KH0466
Registration Fee: Member: 550 US$
Non-Member: 750 US$
Group (5 Pax): 1800 US$
To Register: Registration Form
[Details]
Keyword: Rigid Polyurethanes, Chemsitry, Insultation
Description: # The Nature of Fire and Theoretical Ways to Prevent it.
# Principles of Developing PU Products with Enhanced Fire Resistance
# Raw Materials Improving Fire Resistance of PU’s
# Polyisocyanurate (PIR) Chemistry and Properties
# PIR Formulations and Raw materials
# Manufacturing Equipment for PIR production
# Fire Resistance Testing and Standards
Expert: Dr. Grazyna Mitchener, is the director and principal consultant in Polychemtech Ltd. – a technical and business consultancy specializing in innovative polyurethane technologies and other high performance polymeric products. From 1996 to 2008 she worked for Celotex in UK, developing first in Europe zero-ODP PIR rigid thermal insulation products. For the first ten years of her career she was an academic researcher and lecturer and worked on polymers with high heat and fire resistance. She gained her Ph.D. in Polymer Chemistry and Technology in 1992. She is the author of 8 patents and over 60 scientific papers, conference presentations and training workshops. For her contribution to the thermal insulation industry she was presented with the “Global Insulation Personality of 2014” award.

Technology for Producing Plastic Cellular Materials (Polymeric Foams)
Date: 21 October 2021 (Thursday)
Time: 10.00 am Germany , ~60 Min
Expert: Dr. Bernard E. Obi
Language: English
Code: BuffPack
Format: Recorded
ID: KH0541
Registration Fee: Member: 150 US$
Non-Member: 250 US$
Group (5 Pax) : 600 US$
To Register: Registration Form
[Details]
Description: Cellular materials are solid foams. They are often produced to take advantage of the properties of the solid material whilst at the same time taking advantage of their light-weighting characteristics. The light weight enables their insulation performance since gas is a poorer thermal conductor than solids. This Webinar explores the various technologies for producing cellular plastics (polymeric foams) from various polymer classes. The Webinar will cover aspects of foaming both thermoplastics and thermoset polymers. Thermoplastic polymers are those which are converted to foams starting from fully formed polymers which are processed through softening (melting or devitrification) and then followed by foaming. The end of foaming is accomplished by freezing the cellular structure through recrystallization or vitrification. Thermosetting polymers are those which start from liquid monomeric raw materials which undergo cross-linking chemical reactions to form a solid polymer. The foaming process happens simultaneously with the cross-linking reactions. The KnowHow Webinar will highlight the advantages and disadvantages encountered in foaming thermoplastic and thermoset polymers.
Expert: Dr. Bernard E. Obi is a retired dynamic polymers/materials scientist with extensive expertise in cellular materials in general; but particularly in polyurethane foams processes and applications. He has extensive expertise in both rigid and flexible polyurethane foams. Within the flexible PU foams space, the expertise encompass high resiliency (HR), slab-stock and viscoelastic or memory foams. He earned a Ph.D. in chemical engineering and worked for The Dow Chemical Company from July 1985 to July 2015. Apart from polyurethanes technology; he also has significant expertise in free radical dispersion/suspension polymerization, surface and interfacial science, micro & macro-structure-property-performance relationships, materials development, composites, elastomers and rubbers. He authored a text book on Polymeric Foams Published December 7th 2017 by Elsevier Publishers. Dr. Obi operates his consulting company (PolyFoam Consulting LLC) out of the Houston area in Texas USA, and is engaged in providing consulting services to the polymeric foams industries and businesses.

Thermosets Foams Processing Fundamentals
Date: 26 October 2021 (Tuesday)
Time: 10.00 am CST (US Time) , ~60 Min
Expert: Dr. Bernard E. Obi
Language: English
Format: Live
ID: KH0542
Registration Fee: Member: 150 US$
Non-Member: 250 US$
Group (5 Pax): 600 US$
To Register: Registration Form
[Details]
Description: Thermosetting polymers are those which start from liquid monomeric raw materials, and undergo cross-linking chemical reactions to form a solid polymer. The foam expansion reaction which is called the blowing reaction is usually relatively very fast. The foam expansion process is typically completed between 60 to 90 seconds in most thermosets foaming processes. The gelling reactions which build polymer structure, hardness and strength takes relatively long time to complete, typically requiring several hours for completion. The purpose of the fast blowing expansion reaction is to minimize drainage which leads to foam instabilities and poor foam quality or in the worse case complete foam collapse. Thus the need to expand quickly has to be balanced with the equal need to polymerize (i.e. gelling reaction) quickly enough to stabilize the foam, whilst not too fast to retard both the foam expansion and cell opening for flexible foams. In addition to the balanced gelling reaction, surface active agents are typically used to provide the complex interfacial phenomena that provide stabilization in foaming processes that begin from the liquid state. The Webinar will highlight the complexities encountered in production of thermosetting polymeric foams, including the role of surface active agents, the balance of blowing-to-gelling reaction to control both polymer and cellular properties.
Expert: Dr. Bernard E. Obi is a retired dynamic polymers/materials scientist with extensive expertise in cellular materials in general; but particularly in polyurethane foams processes and applications. He has extensive expertise in both rigid and flexible polyurethane foams. Within the flexible PU foams space, the expertise encompass high resiliency (HR), slab-stock and viscoelastic or memory foams. He earned a Ph.D. in chemical engineering and worked for The Dow Chemical Company from July 1985 to July 2015. Apart from polyurethanes technology; he also has significant expertise in free radical dispersion/suspension polymerization, surface and interfacial science, micro & macro-structure-property-performance relationships, materials development, composites, elastomers and rubbers. He authored a text book on Polymeric Foams Published December 7th 2017 by Elsevier Publishers. Dr. Obi operates his consulting company (PolyFoam Consulting LLC) out of the Houston area in Texas USA, and is engaged in providing consulting services to the polymeric foams industries and businesses.

December 2021

Flexible Polyurethane Foaming and Products Development Processes
Date: 08 December 2021 (Wednesday)
Time: 10.00 am CST (US Time) , ~60 Min
Expert: Dr. Bernard E. Obi
Language: English
Format: Live
ID: KH0543
Registration Fee: Member: 150 US$
Non-Member: 250 US$
Group (5 Pax): 600 US$
To Register: Registration Form
[Details]
Description:
Expert: Dr. Bernard E. Obi is a retired dynamic polymers/materials scientist with extensive expertise in cellular materials in general; but particularly in polyurethane foams processes and applications. He has extensive expertise in both rigid and flexible polyurethane foams. Within the flexible PU foams space, the expertise encompass high resiliency (HR), slab-stock and viscoelastic or memory foams. He earned a Ph.D. in chemical engineering and worked for The Dow Chemical Company from July 1985 to July 2015. Apart from polyurethanes technology; he also has significant expertise in free radical dispersion/suspension polymerization, surface and interfacial science, micro & macro-structure-property-performance relationships, materials development, composites, elastomers and rubbers. He authored a text book on Polymeric Foams Published December 7th 2017 by Elsevier Publishers. Dr. Obi operates his consulting company (PolyFoam Consulting LLC) out of the Houston area in Texas USA, and is engaged in providing consulting services to the polymeric foams industries and businesses.

February 2022

Memory (Viscoelastic) Foams Designs and Applications
Date: 22 February 2022 (Tuesday)
Time: 10.00 am CST (US Time) , ~60 Min
Expert: Dr. Bernard E. Obi
Language: English
Format: Live
ID: KH0544
Registration Fee: Member: 150 US$
Non-Member: 250 US$
Group (5 Pax): 600 US$
To Register: Registration Form
[Details]
Description: Flexible polyurethane foams are produced starting with liquid monomeric components that undergo cross-linking reactions to form thermoset polymeric foams as a final products. Flexible polyurethane foams are a class thermosetting polymeric foams. All the attributes ascribed to the thermosetting polymeric processes are applicable in flexible PU foams. The uniqueness of flexible polyurethane foams is found in their elastomeric response at use temperatures between 0 to 100°C. These foams are designed to offer a range of resiliency or elasticity as well as softness for comfort, load bearing and protection. The tools utilized to achieve these aims are the appropriately chosen polyols and isocyanates to meet the desired level of covalent cross-links, as well as amine producing moieties to produce polyurea hard segments that augment the physical and mechanical properties of the underlying polymer and final foam. There are three categories of flexible foam. Resiliency or % ball rebound is used to characterize these different classes. Resiliency below 10% rebound is categorized as viscoelastic (memory) foams, resiliency between 40 to 55% is used to define slab stock flexible foams, and finally Resiliency greater than 55% is used to define high resiliency or HR foams. The Webinar will highlight the design considerations to achieving the various classes of flexible foams and the processes to produce them including applications that utilize them.
Expert: Dr. Bernard E. Obi is a retired dynamic polymers/materials scientist with extensive expertise in cellular materials in general; but particularly in polyurethane foams processes and applications. He has extensive expertise in both rigid and flexible polyurethane foams. Within the flexible PU foams space, the expertise encompass high resiliency (HR), slab-stock and viscoelastic or memory foams. He earned a Ph.D. in chemical engineering and worked for The Dow Chemical Company from July 1985 to July 2015. Apart from polyurethanes technology; he also has significant expertise in free radical dispersion/suspension polymerization, surface and interfacial science, micro & macro-structure-property-performance relationships, materials development, composites, elastomers and rubbers. He authored a text book on Polymeric Foams Published December 7th 2017 by Elsevier Publishers. Dr. Obi operates his consulting company (PolyFoam Consulting LLC) out of the Houston area in Texas USA, and is engaged in providing consulting services to the polymeric foams industries and businesses.

April 2022

High Resiliency Foams Designs and Applications
Date: 26 April 2022 (Tuesday)
Time: 10.00 am CST (US Time) , ~60 Min
Expert: Dr. Bernard E. Obi
Language: English
Format: Live
ID: KH0545
Registration Fee: Member: 150 US$
Non-Member: 250 US$
Group (5 Pax): 600 US$
To Register: Registration Form
[Details]
Description: High Resiliency foam also known as HR foam is another class of flexible polyurethane foams which in contrast to the viscoelastic foam is designed for very high ball rebound, hence high resiliency. As with all flexible foams, they are also produced starting with liquid monomeric components via cross-linking reactions to form the final products. The uniqueness of HR polyurethane foams is found in their elastomeric response at use temperatures between 0 to 100°C when properly designed. HR foams are designed to offer very high resiliency measured by relatively very high percent ball rebound in the use temperature range particularly near room temperature i.e. 20 °C. The manifestation of this high resiliency is a foam product that is fast to respond to deformations. HR foams are used in applications that require low energy absorption, as in automotive seating etc. This is in contract to VE foams that are designed for high energy absorption. The contrast can be observed by the hysteresis profile of their respective stress-strain curves. The tools utilized to achieve the properties and performance attributes of HR foams are the appropriately chosen polyols and isocyanates to meet the desired level of covalent cross-links, as well as amine producing moieties to produce polyurea hard segments that augment the physical and mechanical properties of the underlying polymer and final foam. The key to achieving the high ball rebound or high resiliency is designing the polymer to have a very low damping factor at the use temperature region. This is achieved by having a very low tan-d peak located at the lowest temperature possible. The Webinar will highlight the design considerations to achieving polymer design targets for HR behavior as well as other difficulties that come about by virtue of such formulation designs and how to manage them.
Expert: Dr. Bernard E. Obi is a retired dynamic polymers/materials scientist with extensive expertise in cellular materials in general; but particularly in polyurethane foams processes and applications. He has extensive expertise in both rigid and flexible polyurethane foams. Within the flexible PU foams space, the expertise encompass high resiliency (HR), slab-stock and viscoelastic or memory foams. He earned a Ph.D. in chemical engineering and worked for The Dow Chemical Company from July 1985 to July 2015. Apart from polyurethanes technology; he also has significant expertise in free radical dispersion/suspension polymerization, surface and interfacial science, micro & macro-structure-property-performance relationships, materials development, composites, elastomers and rubbers. He authored a text book on Polymeric Foams Published December 7th 2017 by Elsevier Publishers. Dr. Obi operates his consulting company (PolyFoam Consulting LLC) out of the Houston area in Texas USA, and is engaged in providing consulting services to the polymeric foams industries and businesses.

June 2022

Rigid Polyurethanes Foams Designs and Applications
Date: 29 June 2022 (Wednesday)
Time: 10.00 am CST (US Time) , ~60 Min
Expert: Dr. Bernard E. Obi
Language: English
Format: Live
ID: KH0546
Registration Fee: Member: 150 US$
Non-Member: 250 US$
Group (5 Pax): 600 US$
To Register: Registration Form
[Details]
Description: Rigid polyurethane foams as the name implies are high modulus (hard) closed celled foams that are predominately used for thermal insulation applications. They are in vast contrast to all flexible polyurethane foams which are soft and are designed to have the maximum open cell content possible. By contrast, rigid PU foams are designed to retain their blowing gas by having the maximum closed cell content possible. This provides the high insulation or low thermal conductivity desired. As with all polyurethane foams which are derived from thermoset polymers, they are also produced starting with liquid monomeric components via cross-linking reactions to form the final products. The uniqueness of Rigid polyurethane foams is found in two main properties namely, high closed cell content (BA gas retention) and very high modulus (hardness). Rigid polyurethane foams are glassy materials at use temperature and undergo brittle failure under stress. The tools utilized to achieve the properties and performance attributes of Rigid PU foams are the appropriately chosen polyols and isocyanates to meet the desired level of covalent cross-links, as well as amine producing moieties to produce polyurea hard segments that augment the physical and mechanical properties of the underlying polymer and final foam. The key to achieving the high modulus (rigidity) is designing the polymer to have the tan-d peak located at the highest temperature possible, (typically > 150 °C). The Webinar will highlight the design considerations to achieving polymer design targets for Rigid PU foam behavior as well as other difficulties that come about by virtue of such formulation designs and how to manage them.
Expert: Dr. Bernard E. Obi is a retired dynamic polymers/materials scientist with extensive expertise in cellular materials in general; but particularly in polyurethane foams processes and applications. He has extensive expertise in both rigid and flexible polyurethane foams. Within the flexible PU foams space, the expertise encompass high resiliency (HR), slab-stock and viscoelastic or memory foams. He earned a Ph.D. in chemical engineering and worked for The Dow Chemical Company from July 1985 to July 2015. Apart from polyurethanes technology; he also has significant expertise in free radical dispersion/suspension polymerization, surface and interfacial science, micro & macro-structure-property-performance relationships, materials development, composites, elastomers and rubbers. He authored a text book on Polymeric Foams Published December 7th 2017 by Elsevier Publishers. Dr. Obi operates his consulting company (PolyFoam Consulting LLC) out of the Houston area in Texas USA, and is engaged in providing consulting services to the polymeric foams industries and businesses.

August 2022

RheoKinetics Measurements in Polyurethane Foaming Processes
Date: 23 August 2022 (Tuesday)
Time: 10.00 am CST (US Time) , ~60 Min
Expert: Dr. Bernard E. Obi
Language: English
Format: Live
ID: KH0547
Registration Fee: Member: 150 US$
Non-Member: 250 US$
Group (5 Pax): 600 US$
To Register: Registration Form
[Details]
Description: All polyurethane foaming reactions start from flowable liquid monomeric components, and ending in polymers with a variety of viscoelastic properties, from soft rubbery to hard brittle solids. The progress from liquid to solid under the foam expansion process is complex and requires full understanding in order to effect optimal cellular properties outcomes. Rheokinetics as the name implies is the study of real time evolution of the polymerization reactions and rheological properties during the foaming process. There are various tools and techniques used to simultaneously follow the polymerization reaction kinetics as well as the rheological properties evolution. The data obtained from such analysis is useful in the proper design of formulations in order to balance the blowing and gelling processes for the right drainage. In the case of rigid polyurethane foams, beyond the proper drainage to minimize cell opening whilst achieving the lowest density possible; this type of data also assist in understanding the mold filling process. If the gelling reaction is too fast, the mold will not be adequately filled and a higher density will also result leading to poor thermal insulation performance. On the other hand, in the case of flexible polyurethane foams where open cell content is a premium, understanding the speed of the gelling reaction vis a vis the foam expansion or blowing reaction is critical to achieve maximum cell opening whilst having optimal cellular properties. The Webinar will highlight the tools and methodologies employed in studying the rheokinetics of the polyurethane foaming processes, and how this could help producers optimally design their formulation.
Expert: Dr. Bernard E. Obi is a retired dynamic polymers/materials scientist with extensive expertise in cellular materials in general; but particularly in polyurethane foams processes and applications. He has extensive expertise in both rigid and flexible polyurethane foams. Within the flexible PU foams space, the expertise encompass high resiliency (HR), slab-stock and viscoelastic or memory foams. He earned a Ph.D. in chemical engineering and worked for The Dow Chemical Company from July 1985 to July 2015. Apart from polyurethanes technology; he also has significant expertise in free radical dispersion/suspension polymerization, surface and interfacial science, micro & macro-structure-property-performance relationships, materials development, composites, elastomers and rubbers. He authored a text book on Polymeric Foams Published December 7th 2017 by Elsevier Publishers. Dr. Obi operates his consulting company (PolyFoam Consulting LLC) out of the Houston area in Texas USA, and is engaged in providing consulting services to the polymeric foams industries and businesses.

October 2022

Surfactancy in Polyurethane Foams and Surface Voids
Date: 25 October 2022 (Tuesday)
Time: 10.10 am CST (US Time) , ~60 Min
Expert: Dr. Bernard E. Obi
Language: English
Format: Live
ID: KH0548
Registration Fee: Member: 150 US$
Non-Member: 250 US$
Group (5 Pax): 600 US$
To Register: Registration Form
[Details]
Description: All polyurethane foaming reactions start from flowable liquid monomeric components, and end in polymers with a variety of viscoelastic properties, from soft rubbery to hard brittle solids. The progress from liquid to solid under the foam expansion process is complex and requires full understanding in order to effect optimal cellular properties outcomes. Surfactancy deals with the processes that aid in the nucleation of bubbles, followed by the stabilization of the expanding liquid polyurethane foaming matrix early in the foaming process where coalescence and foam collapse is extremely likely without the use of surface active agents. The role of surface active agents or surfactants in nucleating and stabilizing the liquid PU foam will be reviewed here, including the structure of surfactants used in PU foaming and the role of these structures in the nucleation and then stabilization of the PU foams. Mechanisms involved in nucleation and stabilization will be fully covered. The Webinar will highlight the role of surfactants in PU foaming processes and their nucleation and stabilization mechanisms. How this influence cellular morphology will be discussed as well.
Expert: Dr. Bernard E. Obi is a retired dynamic polymers/materials scientist with extensive expertise in cellular materials in general; but particularly in polyurethane foams processes and applications. He has extensive expertise in both rigid and flexible polyurethane foams. Within the flexible PU foams space, the expertise encompass high resiliency (HR), slab-stock and viscoelastic or memory foams. He earned a Ph.D. in chemical engineering and worked for The Dow Chemical Company from July 1985 to July 2015. Apart from polyurethanes technology; he also has significant expertise in free radical dispersion/suspension polymerization, surface and interfacial science, micro & macro-structure-property-performance relationships, materials development, composites, elastomers and rubbers. He authored a text book on Polymeric Foams Published December 7th 2017 by Elsevier Publishers. Dr. Obi operates his consulting company (PolyFoam Consulting LLC) out of the Houston area in Texas USA, and is engaged in providing consulting services to the polymeric foams industries and businesses.

December 2022

Thermoplastics Foams Processing Fundamentals
Date: 12 December 2022 (Monday)
Time: 10.00 am CST (US Time) , ~60 Min
Expert: Dr. Bernard E. Obi
Language: English
Code: BuffPack
Format: Live
ID: KH0549
Registration Fee: Member: 150 US$
Non-Member: 250 US$
Group (5 Pax): 600 US$
To Register: Registration Form
[Details]
Description: In contrast to thermosetting foaming processes which start from flowable liquid monomeric components, and end in solid thermoset cellular polymers; thermoplastic foams begin with fully formed polymers. Unlike thermoset polymers whose structures are practically locked-in with covalent cross-links, and therefore not reprocess-able, thermoplastic polymers are those which could be easily reprocessed through softening by applying heat via melting or devitrification. Thermoplastic foaming therefore requires starting with a solid polymer, softening it through melting or devitrification followed by bubble nucleation and foam expansion with both physical and chemical blowing agents that are either dissolved under high pressure or injected into the polymer during foaming process. Surface active agents are not typically required or used in thermoplastic foaming. Extrusion devices that use friction and pressure to melt and dissolve the blowing agents are often used for crystalline polymers. For amorphous polymers which are glassy above ambient temperature, heat is applied to the polymer to devitrify the polymer and then foaming expansion takes place on softening. In both cases, the end of foam expansion is achieved when the solidification is achieved either through recrystallization for crystalline polymers, or vitrification of glassy polymers. The Webinar will fully cover the fundamentals of thermoplastic foaming processes. Some of the contrasting features between thermoplastic and thermoset foaming will also be highlighted.
Expert: Dr. Bernard E. Obi is a retired dynamic polymers/materials scientist with extensive expertise in cellular materials in general; but particularly in polyurethane foams processes and applications. He has extensive expertise in both rigid and flexible polyurethane foams. Within the flexible PU foams space, the expertise encompass high resiliency (HR), slab-stock and viscoelastic or memory foams. He earned a Ph.D. in chemical engineering and worked for The Dow Chemical Company from July 1985 to July 2015. Apart from polyurethanes technology; he also has significant expertise in free radical dispersion/suspension polymerization, surface and interfacial science, micro & macro-structure-property-performance relationships, materials development, composites, elastomers and rubbers. He authored a text book on Polymeric Foams Published December 7th 2017 by Elsevier Publishers. Dr. Obi operates his consulting company (PolyFoam Consulting LLC) out of the Houston area in Texas USA, and is engaged in providing consulting services to the polymeric foams industries and businesses.