INITIATOR-FREE PHOTOEMULSION POLYMERIZATION OF VINYL PROPIONATE AND ITS COPOLYMERIZATION WITH VINYL-ACETATE

Authors
YAMAMOTO T HANATANI M HIROTA K KISHIBE H SANGEN O FUKAE R KAMACHI M SATO T
Citation
T. Yamamoto et al., INITIATOR-FREE PHOTOEMULSION POLYMERIZATION OF VINYL PROPIONATE AND ITS COPOLYMERIZATION WITH VINYL-ACETATE, Kobunshi ronbunshu, 50(4), 1993, pp. 223-225
Citations number
8
Categorie Soggetti
Polymer Sciences
Journal title
Kobunshi ronbunshu → ACNP
ISSN journal
03862186
Volume
50
Issue
4
Year of publication
1993
Pages
223 - 225
Database
ISI
SICI code
0386-2186(1993)50:4<223:IPPOVP>2.0.ZU;2-S
Abstract
Initiator-free photo-emulsion polymerization of vinyl propionate (VPr) and its copolymerization with vinyl acetate (VAc) were carried out in aqueous media at 0-degrees-C by using polyoxyethylene nonyl phenyl et her sodium sulfate as an emulsifier. In each case, poly(vinyl propiona te) (PVPr) or the copolymer was obtained in a good yield. The average degree of polymerization (P(n)) of poly(vinyl alcohol) (PVA) obtained by saponification of PVPr was not high, and the ratios of isotactic tr iad (I), heterotactic triad (H), and syndiotactic triad (S) were 18.5, 49.6, and 31.6%, respectively. P(n)s of PVA's from the copolymers wer e higher than those from PVPr's, and the ratios of the tacticites of P VA's from the copolymers varied with varying feed monomer compositions .