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Toughening of PP/EPDM blend by compatibilization
Author(s) -
Kim Byoung Chul,
Hwang Seung Sang,
Lim Kyung Yul,
Yoon Kee Jong
Publication year - 2000
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 - 10.1002/1097-4628(20001107)78:6<1267::aid-app130>3.0.co;2-b
Subject(s) - copolymer , materials science , polypropylene , compatibilization , maleic anhydride , polymer chemistry , composite material , polymer blend , polymer science , polymer
To improve the mechanical properties of blends of polypropylene (PP) and terpolymer of ethylene–propylene–diene (EPDM), a triblock copolymer, (PP‐ g ‐MAH)‐ co ‐[PA‐6,6]‐ co ‐(EPDM ‐g ‐MAH), was synthesized by coupling reaction of maleic anhydride (MAH)‐grafted PP (PP‐ g ‐MAH), EPDM‐ g ‐MAH, and PA‐6,6. The newly prepared block copolymer brought about a physical interlocking between the blend components, and imparted a compatibilizing effect to the blends. Introducing the block copolymer to the blends up to 5 wt % lead to formation of a β‐form crystal. The wide‐angle X‐ray diffractograms measured in the region of 2θ between 10° and 50° ascertained that incorporating the block copolymer gave a new peak at 2θ = 15.8°. The new peak was assigned to the (300) plane spacings of the β‐hexagonal crystal structure. In addition, the block copolymer notably improved the low‐temperature impact property of the PP/EPDM blends. The optimum usage level of the compatibilizer proved to be 0.5 wt %. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 1267–1274, 2000