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Cyclic macromolecules. Synthesis and characterization of ring-shaped polystyrenes

✍ Scribed by G. Hild; C. Strazielle; P. Rempp

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
506 KB
Volume
19
Category
Article
ISSN
0014-3057

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✦ Synopsis

A~tract--A method has been developed to synthesize cyclic polystyrene molecules, by reacting bifunctional "living" polystyrene with ~,~' dibromo-p-xylene. The ability of the method to yield cyclic polymers over a molecular weight range from 7000 to 250,000 has been thoroughly investigated and discussed. Characterization of the cyclic macromolecules with respect to linear homologues of the same molecular weight has been performed by means of viscometry. The effect of cyclization tends to decrease as the molecular weight increases.

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