This chemical variety produces polyurethanes with different chemical structures leading to many different applications. These include rigid and flexible foams, and coatings, adhesives, electrical potting compounds, and fibers such as spandex and polyurethane laminate (PUL).

The chemical structure and functionality of polyols and isocyanates are expected to afect the properties of polyurethanes. However, other materials used in polyurethanes can also influence properties such as density, porosity, morphology, mechanical strength, and rate of reaction.

Polyurethane, any of a class of synthetic resinous, fibrous, or elastomeric compounds belonging to the family of organic polymers made by the reaction of diisocyanates (organic compounds containing two functional groups of structure ―NCO) with other difunctional compounds such as …

Scientifically, polyurethane is a polymer composed of organic units linked by carbamate (urethane) links. Its general structure can be represented as - (R1-NH-COO-R2-O)- where R 1 and R 2 are organic substituents.

Polyurethane, often abbreviated to PU or PUR, is an organic polymer that features many organic units linked via urethane molecules. Learn about polyurethanes, their properties, and their uses here.

Polyurethane (PUR and PU) can be found virtually everywhere. In this article, we introduce the basics of polyurethane chemistry and discuss the raw materials used to manufacture them.

Polyurethanes (PUs) are polymeric materials that contain a urethane linkage [NH–C(O)–O]. They are formed by the reaction between components containing hydroxyl (–OH) groups, such as components that contain polyol and isocyanate (–N=C=O).

2017年1月1日 · The chapter gives an introduction to the polyurethane (PU) polymer, its synthesis and its structure. The chapter details the different methods of polyurethane synthesis, various starting materials and the necessary components required for PU synthesis.

Polyurethane (PU) materials are a wide variety of polymers where all polymer composed of organic units joined by urethane links are included. Although most PU are thermosets, interlayer polyurethanes are composed of thermoplastic polyurethane (TPU), …

Polyurethanes are made by the exothermic reactions between alcohols with two or more reactive hydroxyl (-OH) groups per molecule (diols, triols, polyols) and isocyanates that have more than one reactive isocyanate group (-NCO) per molecule (diisocyanates, polyisocyanates).