Morphology and mechanical properties of high‐impact polystyrene/elastomer/magnesium hydroxide composites

Abstract

Ternary composites of high-impact polystyrene (HIPS), elastomer, and magnesium hydroxide filler encapsulated by polystyrene were prepared to study the relationships between their structure and mechanical properties. Two kinds of morphology were formed. Separation of elastomer and filler was found when a nonpolar poly[styrene-b-(ethylene-co-butylene)-b-styrene] triblock copolymer (SEBS) was incorporated. Encapsulation of filler by elastomer was achieved by using the corresponding maleinated SEBS (SEBS-g-MA). The mechanical properties of ternary composites were strongly dependent on microstructure. In this study, the composites with separate dispersion structure showed higher elongation, modulus and impact strength than those of encapsulation structure. Impact-fracture surface observation showed that the toughening mechanism was mainly due to the massive cavitation and extensive matrix yielding.

Effect of Modified Eucalyptus nitens Lignin on the Morphology and Thermo-mechanical Properties of Recycled Polystyrene

“…4a and 4c) show a more homogeneous lignin dispersion and smaller particle size. Also, no changes in the laminar morphology of rPS or any other plastic deformation of the matrix was observed, as reported in the literature when high-impact viscoelastic additives are incorporated to PS (Chang et al 2006). …”

Largely improved toughness of PP/EPDM blends by adding nano-SiO2 particles

“…Several complex phase morphologies can be formed in such ternary composites, i.e., separated dispersion structure [1,10e18], coreeshell structure [10e18] and filler-network structure first reported in our previous publication [16]. Chang and co-workers [10] concluded that the mechanical properties of ternary composites were strongly dependent on microstructure. In their study, the composites with separated dispersion structure showed higher elongation, modulus and impact strength than those of encapsulation structure.…”

Mechanistic insights on nanosilica self-networking inducing ultra-toughness of rubber-modified polylactide-based materials

“…the relative arrangement of the components) and the phase size. 25 Concerning the phase morphology, separated microstructures where the elastomer and the filler are dispersed in the polymer matrix separately 26,27 and core-shell microstructures with the filler encapsulating the elastomer, 28,29 are the two current morphologies for these ternary composites. These distinct morphologies gave different mechanical performances with higher modulus and/or toughness in function of the dispersion extent.…”