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Elastomer composition tough flexible from the semi-crystalline amorphous polyolefin block copolymers
Elastomer composition tough flexible from the semi-crystalline amorphous polyolefin block copolymers
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机译:由半结晶无定形聚烯烃嵌段共聚物组成的弹性体组合物,韧性强
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摘要
Polyolefin block and graft copolymers comprised of two or more semicrystalline polyolefin blocks or grafts and one or more amorphous polyolefin blocks can be blended with a low molecular weight fluid diluent that preferentially locates within and swells the amorphous domains of the block or graft copolymer, while preserving the crystallinity of the semicrystalline block domains. After mechanical or thermomechanical processing, such compositions combine softness with high strength and high recoverable elasticity. Compositions are also disclosed whereby the diluent species is removed from the composition, either before or after the mechanical or thermomechanical processing, in order to create a strong elastic material with an ultra-low entanglement density within the amorphous domains.
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