High stiffness propylene polymer composition
作者： Hirokazu Higashi Chome Nakazima , Akio Higashi Chome Suzuki
DOI:
关键词: Boiling 、 Melt flow index 、 Polymer composition 、 Polymerization 、 Tacticity 、 Copolymer 、 Ethylene 、 Materials science 、 Polymer 、 Polymer chemistry
摘要: A high stiffness propylene polymer compositions is described, comprising: 100 parts by weight of crystalline homopolymers, the relation between isotactic pentad ratio (P) and melt flow rate (MFR) being 1.00 ≥ P 0.015 log MFR + 0.955 ratios extracts as obtained successively extracting with boiling n-hexane n-heptane being, respectively, 0.450 to 0.700 0.750 0.930, or ethylene-propylene block copolymers copolymerizing 70 95% weight, based on total copolymers, homopolymers polymerizing at first stage, having a Z 0.955, 5 30% ethylene, ethylene propylene, other a-olefins from which has been removed one more stages, content 3 20% 0.01 1 part phosphate compound represented general formula (I): wherein all symbols are described in specification.
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