Polyurethane - Wikipedia
网页Polyurethane (/ ˌpɒliˈjʊərəˌθeɪn, - jʊəˈrɛθeɪn /; [1] often abbreviated PUR and PU) refers to a class of polymers composed of organic units joined by carbamate (urethane) links. In contrast to other common polymers such as polyethylene and polystyrene, polyurethane is produced from a wide range of starting materials.
Polyurethane | Foam, Synthesis, Plastics | Britannica
网页2024年7月26日 · 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 glycols.
网页This section covers the main materials used for the synthesis and formulation of polyurethanes such as polyols, isocyanates, catalysts, blowing agents, surfactants, and additives. From a general perspective, polyols are flexible segments of the polymeric chain that contribute to the elasticity polyurethanes exhibit.
网页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).
Polyurethanes: Structure, Properties, Synthesis, Characterization…
网页2017年1月1日 · Polyurethanes (PUs) are a versatile class of polymers in both synthesis and applications. The superior properties make them suitable for a wide range of applications. They have very good mechanical properties, …
The chemistry of polyurethanes - li
网页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.
Polyurethane (PU): Structure, properties, and applications
网页2024年1月1日 · Polyurethanes (PU) are an inevitable class of versatile polymeric material comprising carbamate (urethane) organic units links. Polyurethane polymers are formed by reacting polyol with a di- or tri-isocyanate. They comprise of two kinds of monomers, which polymerize one after the other, are categorized under the alternating copolymers.
Polyurethane types, synthesis and applications – a review
网页2016年11月24日 · Polyurethanes (PUs) are a class of versatile materials with great potential for use in different applications, especially based on their structure–property relationships. Their specific mechanical, physical, biological, and chemical properties are attracting significant research attention to tailoring PUs for use i.
Polyurethane | Formula, Properties & Application
网页Polyurethane is a versatile and highly durable synthetic resin used in many industries across the world. Noted for its exceptional flexibility, resilience, and insulating properties, it is utilized in a vast array of applications, from furniture and mattresses to insulation panels and high-performance adhesives.
INTRODUCTION TO POLYURETHANE CHEMISTRY - Polyurethanes …
网页2020年12月11日 · This chapter covers the mechanism and catalysis to polyurethane structure, the side reactions that can take place, and the results these variances can have on the final product. Also covered are the means of minimizing some routes and maximizing others and the properties achieved in such control.