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Cationic polymerization of bis(1-alkylvinyl)benzene and related monomers, 7. Copolymers

✍ Scribed by Gerhard Maier; Oskar Nuyken; Michael B. Leitner

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
536 KB
Volume
195
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Polyindanes with long alkyl side chains have been prepared by reaction of 1,4‐bis(2‐hydroxy‐2‐propyl)benzene (3) and 1,4‐bis(2‐hexadecen‐2‐yl)benzene (4) in various ratios. All copolymers are soluble in common organic solvents and have been characterized by NMR, IR, GPC, DSC and TG. The variation of the glass transition temperature T~g~ with the composition of the copolymers can be described satisfactorily by Couchman's equation, which describes the dependence of the T~g~'s of copolymers on the T~g~'s and heat capacities of the homopolymers and the weight fractions of the comonomers in the copolymers. A very important feature of this step‐growth copolymerization is the ability of all possible end‐groups of monomers and oligomers to react with each other. Therefore the composition of the copolymers is not governed by the composition of the feed, because there is no need for high conversion to obtain high molar mass. It was found that 3 was twice as reactive as 4. The experimentally determined composition of the copolymers is in good agreement with the calculations based on the differences in the reactivity of the monomers.

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