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The effect of stereoregularity on the polyvinyl alcohol–iodine reaction

✍ Scribed by Imai, Kiyokazu ;Matsumoto, Masakazu

Publisher
John Wiley and Sons
Year
1961
Weight
393 KB
Volume
55
Category
Article
ISSN
0022-3832

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✦ Synopsis

Abstract

The color reaction of PVA solution with iodine depends upon the conditions under which the parent polyvinyl acetate was prepared, especially on the polymerization temperature. The higher the degree of polymerization of PVA and the lower the polymerization temperature of the original polyvinyl acetate, the more intense is the blue color. When compared with samples of the same degree of polymerization, samples of PVA from polyvinyl acetate prepared at lower temperatures give the more intense blue color. The result may be explained by differences in stereoregularity.

📜 SIMILAR VOLUMES

The effect of copolymerization on stereo
The effect of copolymerization on stereoregular polyvinyl chloride
✍ Rosen, Irving ;Marshall, W. E. 📂 Article 📅 1962 🏛 John Wiley and Sons ⚖ 327 KB

## Abstract Copolymers of vinyl chloride and vinyl acetate were prepared by tributylboroncatalyzed polymerizations at −15 and −40°C. The Alfrey‐Price equations were used to calculate the monomer reactivity ratios to be expected in a free‐radical propagation at −40°C. The experimentally determined m