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Influence of electron beam irradiation on the mechanical and thermal properties of polypropylene/polyamide6 blends
Author(s) -
Nakamura Shigeya,
Tokumitsu Katsuhisa,
Yamaguchi Tohru
Publication year - 2013
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.39584
Subject(s) - materials science , crystallinity , composite material , polypropylene , irradiation , talc , ultimate tensile strength , dynamic mechanical analysis , heat deflection temperature , flexural strength , differential scanning calorimetry , flexural modulus , polymer , izod impact strength test , thermodynamics , physics , nuclear physics
This article investigates the effects of electron beam irradiation on the mechanical and thermal properties of polypropylene/polyamide6 blends (45/55) with talc 20% (w/w) as filler, SEBS‐g‐MAH 5% (w/w) as compatibilizer, and 10 phr triallyl isocyanurate (TAIC). TAIC is a polyfunctional monomer and acts as a crosslinking agent. Although the tensile and flexural moduli and strengths of the PP/PA6 blends with talc, SEBS‐g‐MAH, and TAIC were increased by the application of electron beam irradiation, the impact strength was decreased. Differential scanning calorimetry measurements showed that the melting temperatures and the degree of crystallinity decreased for all PP/PA6 blends as the electron beam irradiation dose increased, because of the number of structural defects in each crystalline phase. From dynamic mechanical analyzer results, a storage modulus curve in the plateau region was observed only in the PP/PA6 blends with talc, SEBS‐g‐MAH, and TAIC. The modulus increased with increasing electron beam irradiation dose, indicating that the three‐dimensional network developed gradually in the more amorphous PA6. Consequently, the most significant improvement to heat distortion under high load (1.8 MPa) was observed at 200 kGy. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4318–4326, 2013