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Crystallization, melting behavior, and morphology of BPP/HDPE blend
Author(s) -
Feng Y.,
Jin X.,
Hay J. N.
Publication year - 1998
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/(sici)1097-4628(19980919)69:12<2469::aid-app18>3.0.co;2-s
Subject(s) - high density polyethylene , materials science , crystallinity , crystallization , polyethylene , polymer blend , composite material , morphology (biology) , phase (matter) , polymer chemistry , ethylene propylene rubber , differential scanning calorimetry , copolymer , chemical engineering , polymer , chemistry , organic chemistry , thermodynamics , physics , biology , engineering , genetics
The crystallization, melting behavior, and morphology of a low ethylene content block propylene–ethylene copolymer (BPP) and a high‐density polyethylene (HDPE) blend were studied. It was found that the existence of ethylene–propylene rubber (EPR) in BPP has more influence on the crystallization of HDPE than on that of PP. This leads to the decreasing of the melting temperature of the HDPE component in the blends. It is suggested that the EPR component in BPP shifted to the HDPE component during the blending process. The crystallinity of the HDPE phase in the blends decreased with increasing BPP content. The morphology of these blends was studied by polarized light microscopy (PLM) and SEM. For a BPP‐rich blend, it was observed that the HDPE phase formed particles dispersed in the PP matrix. The amorphous EPR chains may penetrate into HDPE particles to form a transition layer. © 1998 John Wiley & Sons, Inc. J. Appl. Polym. Sci. 69: 2469–2475, 1998