UV sensor based on polyurethane foam

Anisotropic polyurethane foam

Anisotropic polymer foams have been prepared, which exhibit a Poisson's ratio exceeding 1, and ratios of longitudinal to transverse stiffness exceeding 50. The foams are as much as 20 times stiffer in the longitudinal direction than the foams from which they were derived. The transformation process involved applying a uniaxial stress sufficient to produce 25% to 45% axial strain to open-cell po...

Soy-Based UV Resistant Polyurethane Pultruded Composites

Soy-based Polyurethane Foam Reinforced with Carbon Nanotubes

The objective of this research is to develop soy-based polyurethane (PU) foam product reinforced with carbon nanotubes. The shortage of petroleum and the increasing concern on environmental issues have resulted in an interest in using renewable substances as building blocks for polymer applications. Multi-walled carbon nanotube (MWNT) was used in this study to reinforce the soy-based polyuretha...

Studies on Indium Sorption from Iodide Medium by Polyurethane Foam

A sorção de iodeto de índio em espuma de poliuretano do tipo poliéter (EPU) foi investigada. O sistema apresentou rápida cinética e máxima sorção numa faixa significativa de meio ácido ou básico e razões de distribuição acima de 10 L kg ([KI] 0.6 mol kg). A análise do equilíbrio de sorção indicou o tetraiodo-indato (MInI 4 )como a principal espécie sorvida na matriz da espuma. A isoterma de Lan...

Waste Minimization Strategy: Flexible Polyurethane Foam Manufacture

Methylene chloride and CFCs are used as auxiliary blowing agents in the manufacture of flexible polyurethanefoams and are promptly emitted during the manufacturing processes.The concentrationof the auxiliary blowing agent are quite low due to the accepted practice of using large volumes of air to lower the ambient concentration of toxic isocyanates (a key chemical in the urethane reaction seque...