Synthesis and Characterization of Segmented Block Copolymers Based on Hydroxyl-Terminated Liquid Natural Rubber and α,ω-Diisocyanato Telechelics

✍ Scribed by Gerhard Maier; Vendula Knopfova; Brigitte Voit; Pham Huu Ly; Bui Tien Dung; Do Bich Thanh

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 145 KB
• Volume: 289
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.200400039

✦ Synopsis

Abstract

Summary: Segmented block copolymers, consisting of non‐polar soft segments from hydroxyl‐terminated liquid natural rubber (HTNR) and polar hard segments from α,ω‐diisocyanato telechelics obtained by “criss‐cross”‐cycloaddition, have been synthesized. The block copolymer formation took place under relatively mild reaction conditions at 80 °C in dichloroethane in the presence of dibutyltin dilaurate as a catalyst. The resulting block copolymers were characterized by spectroscopic techniques (^1^H 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.

Segmented block copolymer from HTNR and α,ω‐diisocyanato telechelics

magnified imageSegmented block copolymer from HTNR and α,ω‐diisocyanato telechelics