Toughening of PP/EPDM blend by compatibilization

Title
Toughening of PP/EPDM blend by compatibilization
Authors
김병철황승상임경률윤기종
Keywords
polypropylene/EPDM blend; polyamide-6,6-based compatibilizer; impact properties; physical interlocking
Issue Date
2000-09
Publisher
Journal of applied polymer science
Citation
VOL 78, 1267-1274
Abstract
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 b-form crystal. The wide-angle X-ray diffractograms measured in the region of 2u between 10° and 50° ascertained that incorporating the block copolymer gave a new peak at 2u 5 15.8°. The new peak was assigned to the (300) plane spacings of the b-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 %.
URI
http://pubs.kist.re.kr/handle/201004/16992
ISSN
0021-8995
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