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Properties of blends of syndiotactic-rich and atactic poly(vinyl alcohols)

✍ Scribed by Shuji Matsuzawa; Kazuo Yamaura; Masanobu Nagura; Toyohiko Fukuta

Publisher
John Wiley and Sons
Year
1988
Tongue
English
Weight
215 KB
Volume
35
Category
Article
ISSN
0021-8995

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✦ Synopsis

The crystallinity, solubility, degree of swelling, and hygroscopicity of the blends of syndiotactic-rich (st-PVA) and atactic poly(viny1 alcohols) (at-PVA) were studied. The crystallinity of the blends increased with increasing annealing temperature and that of the blends annealed at 200Β°C was larger than that of at-PVA. In the 200Β°C annealed blends containing st-PVA about 5076, the insoluble fraction in boiling water was larger than the fraction of st-PVA in each blend. T h e soluble fraction for the blend containing 75% st-PVA was 1.7%. The moisture regain of the blends was less than that of at-PVA.

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