Synthesis of “block order” networks based on styrene-ethylene-butylene ABA triblock copolymer

Styrene-ethylene-butylene ABA triblock copolymer was modified via a novel post-polymerization reaction system, employing available styrene units and a bifunctional chloromethylated agent. The reaction was carried out in solution using a system based on carbon tetrachloride-cyclohexane mixtures and T...

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Bibliographic Details
Published in:European polymer journal 1994-12, Vol.30 (12), p.1375-1380
Main Authors: Theodoropoulos, A.G., Konstantakopoulos, I.C., Valkanas, G.N.
Format: Article
Language:English
Subjects:
Applied sciences
Chemical reactions and properties
Crosslinking, vulcanization
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
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Summary:Styrene-ethylene-butylene ABA triblock copolymer was modified via a novel post-polymerization reaction system, employing available styrene units and a bifunctional chloromethylated agent. The reaction was carried out in solution using a system based on carbon tetrachloride-cyclohexane mixtures and TiCl 4 catalysis. Using u.v. spectroscopy, it is demonstrated that the styrene units of the copolymer are reactive under the applied conditions. A series of products having various degrees of crosslinking was studied in order to characterize their swelling behaviour within a range of organic solvents. Data concerning the kinetics of the reaction, the porosity and the morphology of the final networks were also obtained.
ISSN:0014-3057
1873-1945
DOI:10.1016/0014-3057(94)90266-6