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Toughened mica‐filled polypropylene systems
Author(s) -
Faulkner Douglas L.
Publication year - 1988
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.1988.070360302
Subject(s) - polypropylene , materials science , composite material , compounding , copolymer , natural rubber , mica , ethylene propylene rubber , epdm rubber , izod impact strength test , flexural strength , flexural modulus , monomer , polymer , ultimate tensile strength
A family of rubber‐toughened, mica‐filled polypropylene materials was developed. The rubber modifier used was an ethylene‐propylene‐diene monomer (EPDM) compound. A unique feature of this rubber‐modified system is that it can be directly molded from a dry blend. This simplifies processing by eliminating the need for melt compounding which, in turn, contributes to greater flexural moduli since attrition of the mica platelets is reduced. In addition, impact measurements were conducted as a function of temperature for EPDM/polypropylene and EPM D/poly(propylene‐ethylene) copolymer blends. The low temperature impact resistance was improved for both systems; however, the modified copolymer system maintained ductile behavior to a far lower temperature than the corresponding homopolymer system.