POLY(DIETHYLSILOXANE-CO-ETHYLPHENYLSILOXANE) AND POLY(DIETHYLSILOXANE-CO-METHYLPHENYLSILOXANE) - SYNTHESIS AND CHARACTERIZATION

Authors
BREWER JR TSUCHIHARA K MORITA R JONES JR BLOXSIDGE JP FUJISHIGE S
Citation
Jr. Brewer et al., POLY(DIETHYLSILOXANE-CO-ETHYLPHENYLSILOXANE) AND POLY(DIETHYLSILOXANE-CO-METHYLPHENYLSILOXANE) - SYNTHESIS AND CHARACTERIZATION, Polymer, 35(23), 1994, pp. 5118-5123
Citations number
15
Categorie Soggetti
Polymer Sciences
Journal title
Polymer → ACNP
ISSN journal
00323861
Volume
35
Issue
23
Year of publication
1994
Pages
5118 - 5123
Database
ISI
SICI code
0032-3861(1994)35:23<5118:PAP>2.0.ZU;2-C
Abstract
Copolymers containing diethylsiloxane and functional siloxane groups o f the form RR'SiO (where R = phenyl, and R' = ethyl or methyl) were sy nthesized by equilibrium polymerization of the appropriate cyclotrisil oxanes in the presence of KOH. Quantitative Si-29 n.m.r. spectroscopy indicated that the copolymers possessed random microstructures. Differ ential scanning calorimetry (d.s.c.) analysis showed that both substit uents are effective in lowering the crystal melting and low-temperatur e crystal-crystal transitions with respect to the diethylsiloxane homo polymer, and ultimately lead to non-crystalline copolymers.