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Compatibilization of bentonite filled ethylene‐propylene‐diene monomer composites: Effect of maleic anhydride grafted EPDM
Author(s) -
Ismail H.,
Mathialagan M.
Publication year - 2012
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.37606
Subject(s) - materials science , composite material , compatibilization , natural rubber , maleic anhydride , epdm rubber , ultimate tensile strength , curing (chemistry) , ethylene propylene rubber , compression set , composite number , copolymer , polymer blend , polymer
Maleic anhydride grafted ethylene‐propylene‐diene monomer (MAH‐ g ‐EPDM) was prepared by peroxide‐initiated melt grafting of MAH onto EPDM using a HAAKE internal mixer at 180°C and 60 rpm for 5 min and it was used as compatibilizer to enhance the compatibility of EPDM/Bt composites. The composites were prepared using a laboratory scale two roll mill, model XK‐160 at room temperature. The addition of 10 parts per hundred rubber (phr) of MAH‐ g ‐EPDM into EPDM/Bt composite results in significantly improved tensile properties compared with the uncompatibilized EPDM/Bt composites. Curing behavior, tensile properties, solvent resistance, and the rubber‐filler interaction of compatibilized and uncompatibilized EPDM/Bt composites were investigated. The cure time ( t 90 ), scorch time ( t S 2 ), maximum torque ( M H ), and minimum torque ( M L ) of compatibilized composites were increased upon addition of MAH‐ g ‐EPDM. Compared with uncompatibilized EPDM/Bt composites, the tensile properties, solvent resistance, and rubber‐filler interaction of compatibilized EPDM/Bt composites were all improved. SEM micrographs of tensile fractured surfaces of compatibilized EPDM/Bt composites showed a better dispersion of Bt and interfacial adhesion between EPDM and Bt compared with uncompatibilized EPDM/Bt composites. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013