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Preparation and application of low molecular weight poly(vinyl chloride). I. Preparation and thermal stability

✍ Scribed by Kikuo Yamamoto; Takashi Maehara; Katsuo Mitani; Yukio Mizutani

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
343 KB
Volume
51
Category
Article
ISSN
0021-8995

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✦ Synopsis

Tokuyama Soda Co., Ltd., Yarnaguchi, 745 Japan

SYNOPSIS

Poly( vinyl chloride) with relatively low molecular weight (LMW-PVC) was prepared by suspension polymerization in the presence of some chain-transfer agents, such as mercapto compounds. It is elucidated by means of thermogravimetry, dehydrochlorination, color difference, and discoloration that the resultant LMW-PVC has good thermal stability. The degree of dehydrochlorination of the LMW-PVC obtained by using n -dodecylmercaptan increases with increasing the content of component from the chain-transfer agent. It is found that the LMW-PVC obtained by using mercapto compounds shows better thermal stabiIity (discoloration property) than does the one obtained without using these agents, at the same weight-average polymerization degree.

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## Abstract Poly(vinylidene chloride‐__co__‐vinylchloride)/organically modified hectorite (VDC‐VC/SPN) nanocomposites were prepared by melt blending VDC‐VC copolymer with SPN in the presence of dioctyl phthalate, which acted as a plasticizer. As a result, the exfoliated structure was found in the V