Related Experiment Video
Updated: Nov 7, 2025

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
Published on: March 8, 2019
Viscoelastic Polyurethane Foam with Keratin and Flame-Retardant Additives
Krystyna Wrześniewska-Tosik1, Joanna Ryszkowska2, Tomasz Mik1
1Łukasiewicz Research Network, Institute of Biopolymers and Chemical Fibres, ul. Skłodowskiej-Curie 19/27, 90-570 Łódź, Poland.
Abstract:
Viscoelastic polyurethane (VEPUR) foams with increased thermal resistance are presented in this article. VEPUR foams were manufactured with the use of various types of flame retardant additives and keratin fibers. The structure of the modified foams was determined by spectrophotometric-(FTIR), thermal-(DSC), and thermogravimetric (TGA) analyses as well as by scanning electron microscopy (SEM). We also assessed the fire resistance, hardness, and comfort coefficient (SAG factor). It was found that the use of keratin filler and flame retardant additives changed the foams' structure and properties as well as their burning behavior. The highest fire resistance was achieved for foams containing keratin and expanding graphite, for which the reduction in heat release rate (HRR) compared to VEPUR foams reached 75%.
More Related Videos
Related Concept Videos
Superplasticizers
Additives and Fillers in Concrete
The...
Plasticizers
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
Polymer Classification: Architecture
Molecular Weight of Step-Growth Polymers
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
Fiber Reinforced Concrete

