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Some new aspects of the crystallization of bisphenol‐A polycarbonate
Author(s) -
Gallez F.,
Legras R.,
Mercier J. P.
Publication year - 1976
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760160410
Subject(s) - polycarbonate , plasticizer , bisphenol a , crystallization , materials science , bisphenol , polymer , nucleation , polymer chemistry , glass transition , melting point , composite material , chemical engineering , organic chemistry , chemistry , epoxy , engineering
This paper concerns the action of plasticizers and nucleating agents on the crystallization of bisphenol‐A polycarbonate. The influence of plasticizers is to increase the rate of crystallization to a great extent using 10 percent of a plasticizer such as trimellitic acid, tridecyloctyl ester. The influence of nucleating substances on plasticized and undiluted polycarbonate is investigated. A large number of substances have been found capable of nucleating polycarbonate crystallization. The un‐plasticized semi‐crystalline polycarbonate is characterized by a much higher melting point (300°C) than the plasticized semi‐crystalline systems (210–245°C). The stability of bisphenol‐A polycarbonate in the presence of nucleating salts is also examined. We observe a substantial decrease in the molecular weight in the presence of a great number of nucleating substances. The modulus‐temperature curves of two semi‐crystalline polymers are reported in the last series of experiments.