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9. Polyurethanes
出版Elsevier Inc. Chapters, 2013-11-28
主題Technology & Engineering / Engineering (General)Technology & Engineering / Industrial EngineeringTechnology & Engineering / Textiles & PolymersTechnology & Engineering / Materials Science / General
ISBN01280906859780128090688
URLhttp://books.google.com.hk/books?id=mZ51DAAAQBAJ&hl=&source=gbs_api
EBookSAMPLE
註釋In the chapter polyurethanes of practical use like poly(esterurethanes), poly(ether-urethanes), and poly(urethaneurea) are described. They belong to block copolymers in which chemically connected hard and soft blocks (segments) are present. Those macromolecules are characterized by the presence of polar urethane groups in the main backbone next to ester, ether, urea, and other groups. Cross-linked Pus are developed as advanced coatings or membranes, polymers with shape memory properties, materials resistant to biodegradation for medical application, or materials with non-elastic optical properties for electronics.