MICROSTRUCTURES OF A HYDROGENATED STYRENE-BUTADIENE COPOLYMER BY C-13NMR

Authors
SINGHA NK MOHANDAS TP
Citation
Nk. Singha et Tp. Mohandas, MICROSTRUCTURES OF A HYDROGENATED STYRENE-BUTADIENE COPOLYMER BY C-13NMR, Journal of macromolecular science. Pure and applied chemistry, A34(11), 1997, pp. 2269-2278
Citations number
19
Categorie Soggetti
Polymer Sciences
Journal title
Journal of macromolecular science. Pure and applied chemistry → ACNP
ISSN journal
10601325
Volume
A34
Issue
11
Year of publication
1997
Pages
2269 - 2278
Database
ISI
SICI code
1060-1325(1997)A34:11<2269:MOAHSC>2.0.ZU;2-N
Abstract
The microstructure and sequence distribution of a styrene-ethylene-but ene-l copolymer obtained by quantitative hydrogenation of emulsion sty rene-butadiene rubber (SBR) was determined using C-13 NMR. The results show that the polymer has 82% (CH2)(>6) units arising due to BBB', SB B and BBB triads (B = hydrogenated 1,4 butadiene, B' = butene-land S = styrene). The presence of long crystallizable methylene sequences res ults in a melting endotherm at 45 degrees C for the hydrogenated SBR.