摘要:
Syndiotactic polystyrene can be impact-modified by a blend of (a) polystyrene-hydrogenated polybutadiene block copolymers and (b) one or more core/shell modifiers based on a lightly or non-crosslinked rubber core, and with at least one shell or intermediate shell stage which is predominantly polystyrene, to produce a material of higher impact strength than the better value of either additive singly at the same total impact modifier level.
摘要:
Rapidly crystallizing blends of poly(ethylene terephthalate) modified with multi-stage impact modifiers, polycarbonate, and linear low density polyethylene are attractive molding compositions, but may suffer from plateout of additives upon re-processing of regrind. Low levels of hindered phenol antioxidants or sulfur-containing esters, added to the blend, are effective in reducing plate-out without affecting nucleation or mold release.
摘要:
Poly(ethylene terephthalate) modified with an impact modifier, a small amount of polycarbonate, and a nucleator is a rapidly-crystallizing tough molded or extruded material, whose surface and mold-release properties are enhanced by the presence of small amounts of ethylene/acrylate copolymers. Plate-out during processing also is reduced.
摘要:
Impact modifiers which produce transparent, high notched Izod impact strength blends with amorphous, aromatic polyesters are described. The impact modifiers are core-shell polymers with cores comprised mainly of rubbery polymers of diolefins and vinyl aromatic monomers and shells comprised mainly of styrene copolymers (e.g. styrene and hydroxyalkyl (meth)acrylate).
摘要:
Impact modifiers which produce transparent, high notched Izod impact strength blends with amorphous, aromatic polyesters are described. The impact modifiers are core-shell polymers with cores comprised mainly of rubbery polymers of diolefins and vinyl aromatic monomers and shells comprised mainly of styrene copolymers (e.g. styrene and hydroxyalkyl (meth)acrylate).