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Synthesis and characterization of poly(dimethyl siloxane) containing poly(vinyl pyrrolidinone) block copolymers

✍ Scribed by Nurseli̇ Uyanik; Berri̇n Köker; Yalçin Yildiz

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
200 KB
Volume
71
Category
Article
ISSN
0021-8995

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✦ Synopsis

ABA-type block copolymers containing segments of poly(dimethyl siloxane) and poly(vinyl pyrrolidinone) were synthesized. Dihydroxyl-terminated poly(dimethyl siloxane) was reacted with isophorone diisocyanate and then with t-butyl hydroperoxide to obtain macroinitiators having siloxane units. The peroxidic diradical macroinitiators were used to polymerize vinyl pyrrolidinone monomer to synthesize ABA-type block copolymers. By use of physicochemical methods, the structure was confirmed, and its characterization was accomplished. Mechanical and thermal characterizations of copolymers were made by stress-strain tests and differential scanning calorimetric measurements.

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