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Modification of PP/HDPE blends by PP‐PE sequential polymerization product
Author(s) -
Zhu Wei,
Zhang Xuequan,
Huang Baotong,
Feng Zhiliu
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.1995.070580304
Subject(s) - high density polyethylene , materials science , polypropylene , ultimate tensile strength , elongation , polyethylene , copolymer , polymer blend , polymerization , composite material , morphology (biology) , polymer chemistry , izod impact strength test , polymer , genetics , biology
The morphology and mechanical properties of polypropylene/high‐density polyethylene (PP/HDPE) blends in a wide range of compositions modified by a sequential Ziegler‐Natta polymerization product (PP‐PE) have been investigated. PP‐PE contains multiple components such as PP, ethylene‐propylene copolymer (EPC), and high molecular weight polyethylene (HMWPE). The effects of PP‐PE on the mechanical properties and morphology of the PP/HDPE blends are the aggregative results of all its individual components. Addition of PP‐PE to the blends not only improved the tensile strength of the blends, but the elongation at break increased linearly while the moduli were nearly unchanged. Morphological studies show that the adhesion between the two phases in all the blends of different compositions is enhanced and the dispersed domain sizes of the blends are reduced monotonously with the increment of the content of PP‐PE. PP‐PE has been demonstrated to be a more effective compatibilizer than EPC. Based on these results, it can be concluded that the tensile strength of the blends most on the adhesion between the two phases and the elongation at break depends most on the domain size of the dispersed component. © 1995 John Wiley & Sons, Inc.