Synthesis of New of Norbornene–1,5-Bis(hexenyl)hexamethyltrisiloxane Copolymers via Olefin Metathesis Reaction

New copolymers of norbornene and 1,5-bis(hexenyl-5)-1,1,3,3,5,5-hexamethyltrisiloxane containing flexible siloxane and rigid norbornene fragments in the main chain are synthesized. Synthesis is carried out using three types of olefin metathesis reactions: the ring-opening metathesis polymerization o...

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Bibliographic Details
Published in:Polymer science. Series B 2020-11, Vol.62 (6), p.638-648
Main Authors: Morontsev, A. A., Gringolts, M. L., Filatova, M. P., Denisova, Yu. I., Kudryavtsev, Y. V., Finkelstein, E. Sh
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Modification of Polymers
Polymer Sciences
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Summary:New copolymers of norbornene and 1,5-bis(hexenyl-5)-1,1,3,3,5,5-hexamethyltrisiloxane containing flexible siloxane and rigid norbornene fragments in the main chain are synthesized. Synthesis is carried out using three types of olefin metathesis reactions: the ring-opening metathesis polymerization of norbornene, the metathesis of nonconjugated diene 1,5-bis(hexenyl-5)-1,1,3,3,5,5-hexamethyltrisiloxane, and the interchain macromolecular cross-metathesis between polynorbornene and siloxane-containing polyene. The latter reaction is studied for the first time. With its help, new statistical multiblock copolymers of norbornene and 1,5-bis(hexenyl-5)-1,1,3,3,5,5-hexamethyltrisiloxane with different average block lengths are obtained and characterized by 1 H and 13 C NMR and IR spectroscopy. The effect of the copolymer structure on their thermal properties is investigated.
ISSN:1560-0904
1555-6123
DOI:10.1134/S1560090420060093