Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 100, Issue 4, Pages 2744-2749Publisher
WILEY
DOI: 10.1002/app.23371
Keywords
poly(styrene-co-maleic anhydride); imidization; kinetics
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The imidization of poly(styrene-co-maleic anhydride) with amines may improve some of its end-use properties. The objective of this study was to examine the mechanism and kinetics with aniline (ANL) as an amine of the preparation of poly(styrene-co-N-phenyl maleimide). The reaction was carried out in a tetrahydrofuran solution at 25-55 degrees C and in an ethylbenzene solution at 85-120 degrees C. The extent of the reaction was determined by conductance titration, a new and simple method. Two consecutive reactions were involved in the imidization: ring opening to produce an acido-amide group and ring closing to form a corresponding imide group. The imidization rate was greatly influenced by the reaction temperature and the molar ratio of ANL to the anhydride. A model for the imidization kinetics over a wide range of reaction temperatures and concentration ranges was developed and validated. (c) 2006 Wiley Periodicals, Inc.
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