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Effect of poly(vinyl chloride)/chlorinated polyethylene blend composition on thermal stability
Author(s) -
Klarić I.,
Vrandečić N. Stipanelov,
Roje U.
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20001003)78:1<166::aid-app200>3.0.co;2-a
Subject(s) - miscibility , vinyl chloride , polyvinyl chloride , materials science , thermogravimetric analysis , thermal stability , polyethylene , polymer blend , glass transition , activation energy , composite material , chlorinated polyvinyl chloride , polymer chemistry , chemical engineering , polymer , chemistry , organic chemistry , copolymer , engineering
Abstract Blends of poly(vinyl chloride) (PVC) with different ratios of chlorinated polyethylene (CPE) were degradated by the thermogravimetric method under dynamic conditions (50–600°C) in an inert atmosphere. The effect of the miscibility and composition of the PVC/CPE blends on the thermal stability were investigated. DSC curves of the blends show neither a shift of the PVC glass transition temperature nor a shift of the CPE melting temperature, which means that these blends are heterogeneous. The characteristics of the TG curves were determined, some of which ( T 1% , T 5% , Δ m 1 ) can be used as indicators of the thermal stability of the blend. The apparent activation energy of PVC dehydrochlorination in the blends was also calculated. Comparison of the experimental TG curves and TG curves predicted by the additivity rule indicates the existence of the components' interaction in the PVC/CPE blends. The addition of CPE improves the thermal stability of PVC for all the investigated blends in the temperature range where α calc is greater than α exp . © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 166–172, 2000