Authors Maier, G. ; Knopfova, V. ; Voit, B. ; Ly, Pham Huu ; Dung, B. T. ; Thanh, Do Bich
Title Synthesis and Characterization of Segmented Block Copolymers Based on Hydroxyl-Terminated Liquid Natural Rubber and a,w-Diisocyanato Telechelics
Date 11.08.2004
Number 12095
Abstract Segmented block copolymers, consisting of non-polar soft segments from hydroxyl-terminated liquid natural rubber (HTNR) and polar hard segments from alpha,omega-diisocyanato telechelics obtained by "criss-cross"-cycloaddition, have been synthesized. The block copolymer formation took place under relatively mild reaction conditions at 80 T in dichloroethane in the presence of dibutyltin dilaurate as a catalyst. The resulting block copolymers were characterized by spectroscopic techniques (H-1 NMR, FTIR, UV-vis spectroscopy) as well as GPC for molar mass determination. The block copolymers were compression molded in a hot stage press, and the resulting samples were characterized by DSC and stress-strain measurement. The solubility and phase morphology of the materials have also been studied.
Publisher Macromolecular Materials and Engineering
Citation Macromolecular Materials and Engineering 289 (2004) 927-932
Tags block copolymers "criss-cross"-cycloaddition synthesis thermoplastic elastomers 1 3-dipolar cycloaddition polyurethanes polymers

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