e-Article
Synthesis of Vinyl-Containing Polydimethylsiloxane in An Active Medium.
Document Type
Article
Author
Source
Subject
*ACTIVE medium
*DISTRIBUTION (Probability theory)
*SILOXANES
*MOLECULAR weights
*COPOLYMERIZATION
*COPOLYMERS
*POLYDIMETHYLSILOXANE
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Language
ISSN
2073-4360
Abstract
This research deals with the synthesis of copoly(methylvinyl)(dimethyl)siloxanes by the copolycondensation of dimethyldiethoxy- and methylvinyldimethoxysilane in an active medium, followed by thermal condensation in a vacuum. We achieved a range of copolymers exhibiting finely tuned molecular weights spanning between 1500 and 20,000 with regulated functional methylvinylsiloxane units. Analysis of the microstructure showed that the copolymerization predominantly formed products demonstrating a random distribution of units (R~1). However, an increase in the content of vinyl-containing monomers increases the R parameter, indicating an enhanced tendency towards alternating linkages within the copolymer matrix. [ABSTRACT FROM AUTHOR]