Introduction to Polyurethane Chemistry - ACS Publications
2021年5月19日 · Polyurethane is among the most important classes of industrial polymers with the fastest-growing global market. This is due to the ability to modify the starting chemicals for a range of polyurethanes with desired properties. The global polyurethane market was valued at more than $65 billion and is expected to increase at a rate of 3.2% until 2027.
physical behavior to chemical properties to novel applications and sustainability, polyurethane chemistries and technologies are rapidly responding to and adopting such changes and needs. This chapter discusses some of the important topics of polyurethanes including their chemistry, mechanism, and synthesis of new
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).
The chemistry of polyurethanes - li
In this article, we introduce the basics of polyurethane chemistry and discuss the raw materials used to manufacture them. In this technical article: The polyurethane reaction; Raw materials used to produce polyurethanes. Part A: Polyol; Part B: Isocyanate. Blocked isocyanates; Catalysts. Amine catalysts; Mercury catalysts; Tin catalysts ...
PU are formed by chemical reaction between a di/poly isocyanate and a diol or polyol, forming repeating urethane groups, generally, in presence of a chain extender, catalyst, and/or other additives. Often, ester, ether, urea and aromatic rings are also present along with urethane linkages in PU backbone. 2.1. Isocyanates
Polyurethanes: Structure, Properties, Synthesis, Characterization…
2017年1月1日 · The chapter details the different methods of polyurethane synthesis, various starting materials and the necessary components required for PU synthesis. The chapter also deals with the phase separation process of polyurethane and the effect of phase separation on the morphology, thermal, and mechanical properties of PU.
Polyurethane types, synthesis and applications-a review
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...
Chemical upcycling of commodity thermoset polyurethane …
2023年8月28日 · Here we report a highly efficient chemical strategy for upcycling thermoset polyurethane foams that yields products of much higher economic values than the original material. Starting from a...
Polyurethane - an overview | ScienceDirect Topics
The versatility of polyurethane chemistry enables the polyurethane chemist to engineer polyurethane resin to achieve the desired properties. Polyurethanes as an elastomer have superior toughness and abrasion, in such applications as solid tyres, wheels, bumper components, or insulation.
Introduction to Polyurethane Chemistry - Wiley Online Library
2014年11月7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. It also covers the means of minimizing some routes, maximizing others, and the properties achieved in such control.