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Effect of ethylene‐propylene copolymer with residual PE crystallinity on mechanical properties and morphology of PP/HDPE blends
Author(s) -
Zhu Wei,
Zhang Xuequan,
Feng Zhiliu,
Huang Baotong
Publication year - 1995
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1995.070580309
Subject(s) - high density polyethylene , crystallinity , materials science , ultimate tensile strength , polypropylene , elongation , copolymer , polyethylene , composite material , polymer blend , compatibilization , izod impact strength test , polymer chemistry , polymer
Morphology and mechanical properties of polypropylene (PP)/high density polyethylene (HDPE) blends modified by ethylene‐propylene copolymers (EPC) with residual PE crystallinity were investigated. The EPC showed different interfacial behavior in PP/HDPE blends of different compositions. A 25/75 blend of PP/HDPE (weight ratio) showed improved tensile strength and elongation at break at low EPC content (5 wt %). For the PP/HDPE = 50/50 blend, the presence of the EPC component tended to make the PP dispresed phase structure transform into a cocontinuous one, probably caused by improved viscosity matching of the two components. Both tensile strength and elongation at break were improved at EPC content of 5 wt %. For PP/HDPE 75/25 blends, the much smaller dispersed HDPE phase and significantly improved elongation at break resulted from compatibilization by EPC copolymers. © 1995 John Wiley & Sons, Inc.