Polymer matrix reinforced by woven fabrics is probably the most commonly used form of composites in structural application such as aircrafts, boats, and automobiles, etc. [1].The fiber reinforced polyurethane (PU) are being used for high performance composites due to their light weight and superior heat insulation as well as good mechanical characteristics. The high versatility of polyurethane ...

Polyurethane (PU) is the fifth most common polymer in the general consumer market, following Polypropylene (PP), Polyethylene (PE), Polyvinyl chloride (PVC), and Polystyrene (PS), and the most common polymer for thermosetting resins. In particular, polyurethane has excellent hardness and heat resistance, is a widely used material for electronic products and automotive parts, and can be used to ...

We studied the seated buttock pressure distribution in six paraplegic patients by means of computerized pressure mapping. They were all male and their age ranged from 18 to 48 years old. Their level of paralysis varied from Th5 to L1. Five kinds of wheelchair cushions were studied: an air cushion, a contour cushion, a polyurethane foam cushion, a Cubicushion (which is made of polyurethane foams...

Nowadays, the investigation of both classic and new materials for blast mitigation applications is a subject intensively approached in scientific literature. Due to their mechanical behavior, polyurethane foams are with high potential this type applications. Within current paper EUROPLASTIC� foam grade mixed fly ash ceramic micro powder was experimentally investigated. Using single stage gas gu...

Thermal insulation materials extend the shelf life of food and reduce energy consumption. Polyurethane (PU) are often used to keep hot cold. Improving thermal properties PU can significantly contribute savings lower food-related costs in pharmaceutical industries. Polyurethane/expanded graphite (PU/EG) composites were obtained by hot-pressing adding expanded (EG) foams. Composites with 0.05%, 5...

In this research the composition of polyurethane closed cell (PUCC) with two different concentrations of SiO2 nanoparticles (1.0 and 2.0 wt%) have been prepared. Optical microscopy and SEM imaging, watering uptake, FTIR and Raman spectroscopy of the synthesized samples were carried out. The optical microscopy imaging of samples showed differences in the appearance of matrix produ...

Background: Water pollution is an important environmental problem, undoubtedly, the presence of toxic heavy metals forms the main source of water contamination. Sorption characteristics of polyurethane foams modified with bis (2-ethylhexyl)phosphoric acid (DEHPA) for the removal of zinc, lead and cadmium ions from contaminated solutions were investigated. Methods: Operating variables, such as ...