Studies on heterogeneous polymeric systems

Abstract

The physical and morphological properties of heterogeneous mixtures of polystyrene with styrene: butadiene copolymers were determined. A mechanism of ultimate failure is proposed which permits the qualitative rationalization of the effects of copolymer composition, structure, and concentration upon certain physical properties of the mixture.

Mechanisms of Toughening Thermoset Resins

“…For example, in 1956, Merz et al (31,32) proposed the first mechanism of ultimate failure for heterogeneous mixtures of polystyrene with styrene-butadiene copolymers. The blend was a rubbber-toughened high-impact polystyrene (HIPS) system.…”

Poly(hydroxyether of bisphenol A)/poly(vinyl acetate) blends:In situ polymerization preparation, morphology, and properties

“…In the phase separation induced by polymerization, the morphology can be determined by the competitive processes of phase separation, i.e., phase coarsening and polymerization. Yamanaka and Inoue [32][33][34][35][36] proposed that the phase separation in thermoplastic-modified epoxy resins occur via spinodal decomposition.…”

Blend toughening of poly(vinyl chloride) by chlorinated polyethylene/hydroxy ethyl acrylate graft copolymer

“…7,8 A two-phase physical model, which includes a brittle matrix and dispersed rubber, was suggested to explain the toughening mechanism. Generally, there are two kinds of cases with rubber toughening systems in the polymer morphology, those composed of a disperse phase and a continuous phase and a network system.…”