MECHANOCHEMICAL BLOCK COPOLYMERIZATION IN HETEROGENEOUS SYSTEMS OF THE SOLID POLY(VINYL CHLORIDE) WITH STYRENE BY ULTRASONIC IRRADIATION .2. EFFECT OF SEVERAL FORMS OF SUSPENSION POLYMERIZED POLY(VINYL CHLORIDE) PARTICLES

Authors
FUJIWARA H KIKYU T NANBU H HONDA T
Citation
H. Fujiwara et al., MECHANOCHEMICAL BLOCK COPOLYMERIZATION IN HETEROGENEOUS SYSTEMS OF THE SOLID POLY(VINYL CHLORIDE) WITH STYRENE BY ULTRASONIC IRRADIATION .2. EFFECT OF SEVERAL FORMS OF SUSPENSION POLYMERIZED POLY(VINYL CHLORIDE) PARTICLES, Polymer bulletin, 33(3), 1994, pp. 317-323
Citations number
7
Categorie Soggetti
Polymer Sciences
Journal title
Polymer bulletin → ACNP
ISSN journal
01700839
Volume
33
Issue
3
Year of publication
1994
Pages
317 - 323
Database
ISI
SICI code
0170-0839(1994)33:3<317:MBCIHS>2.0.ZU;2-Q
Abstract
The effect of several forms of suspension polymerized poly(vinyl chlor ide) particles on mechanochemical block copolymerization in the solid poly(vinyl chloride)-styrene-sodium dodecyl sulfate solutions has been studied by ultrasonic irradiation at 60-degrees-C. The block copolyme rization of styrene was initiated by free radicals produced from the p oly(vinyl chloride) particles by ultrasonic waves. The rates of copoly merization increased with increasing the additional amount of the soli d poly(vinyl chloride), the porosity, and the average diameter of the grain particles. In particular, the influence of the average diameter was much larger than that of the porosity. When the porosity and the a verage diameter were increased, the rates of decrease in the viscosity -average degree of polymerization of the degraded poly(vinyl chloride) were much increased. In addition, the changes in the composition of t he block copolymer and homopolymers in the reaction products were obta ined.