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Synthesis of vinyl polymers containing α-substituted γ-butyrolactone groups in their backbones

✍ Scribed by Zutty, N. L. ;Welch, F. J.

Book ID
104532470
Publisher
Wiley (John Wiley & Sons)
Year
1963
Tongue
English
Weight
566 KB
Volume
1
Category
Article
ISSN
0449-2951

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✦ Synopsis

Abstract

When vinyl chloride—methyl methacrylate copolymers having a uniform chain‐to‐chain composition, are pyrolyzed at temperatures around 150°C., an intramolecular lactonization occurs forming α‐methyl‐γ‐butyrolactone groups in the polymer backbone concomitant with the quantitative elimination of methyl chloride. This reaction has been shown to be a general reaction for copolymers containing α‐substituted γ‐haloester groups in their backbone. The formation of the lactone groups in these polymers leads to increased chain rigidity and higher polymer softening points. Advantage has been taken of the gaseous alkyl halide elimination to produce rigid vinyl foams of good compressive strengths.

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