PTC effect in carbon black‐filled ethylene–propylene–diene terpolymer systems | Zendy

He Xiujuan | Zendy; Wang Lijie | Zendy; Chen Xinfang | Zendy

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PTC effect in carbon black‐filled ethylene–propylene–diene terpolymer systems

Author(s) -

He Xiujuan,

Wang Lijie,

Chen Xinfang

Publication year - 2001

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.1249

Subject(s) - crystallinity , carbon black , materials science , amorphous solid , temperature coefficient , composite number , ethylene propylene rubber , copolymer , ethylene , composite material , irradiation , epdm rubber , glass transition , polymer chemistry , polymer , chemistry , natural rubber , catalysis , organic chemistry , physics , nuclear physics

The positive temperature coefficient (PTC) effects of carbon black (CB)‐filled semicrystalline and amorphous ethylene–propylene–diene terpolymer (EPDM) composites were studied. The semicrystalline EPDM/CB composite exhibited a low PTC effect followed by a pronounced negative temperature coefficient (NTC) effect, while the amorphous EPDM/CB composite exhibited only an NTC effect. By the effect of γ‐ray irradiation, not only was the NTC effect of the composites eliminated, but also a high PTC effect appeared. The PTC intensity reached as high as six orders of magnitude even for an amorphous EPDM/CB composite and the PTC transition temperature decreased with the irradiation dose. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 1571–1574, 2001

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