Thermogravimetric Analysis of Vinyl Chloride/Acrylonitrile Copolymers
作者:
B.L. Joesten,
N.W. Johnston,
期刊:
Journal of Macromolecular Science: Part A - Chemistry
(Taylor Available online 1974)
卷期:
Volume 8,
issue 1
页码: 83-94
ISSN:0022-233X
年代: 1974
DOI:10.1080/00222337408065816
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The dehydrohalogenation of several alternating and random vinyl chloride/acrylonitrile copolymers was characterized by thermogravimetry. The polymers were made in solution, and the conversions were kept below 5% to insure uniform sequence distributions. Hydrogen chloride was generated within a relatively narrow temperature range somewhere between 200 and 300°C depending on the sequence distribution, relative viscosity, and composition. The weight-loss during the dehydrohalogenation could be attributed completely to the hydrogen chloride available in the copolymer. Alternating copolymers were significantly more stable than random copolymers were significantly more stable than random copolymers at the same relative viscosity. For a given sequence distribution or composition, stability decreased with decreasing relative viscosity. The stability decreased as acrylonitrile content was increased from 23 to 57%.
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