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    Radiation Processing and Characterization of Some Ethylene-propylene-diene Terpolymer/Butyl (Halobutyl) Rubber/Nanosilica Composites

    Year: 2020

    Journal: Polymers, Volume 12, OCT

    Authors: Manaila, Elena; Airinei, Anton; Stelescu, Maria Daniela; Sonmez, Maria; Alexandrescu, Laurentia; Craciun, Gabriela; Pamfil, Daniela; Fifere, Nicusor; Varganici, Cristian-Dragos; Doroftei, Florica; Bele, Adrian

    Organizations: Research and Innovation Ministry, RDI Programme for Space Technology and Advanced Research-STAR-ROSA [140/2017, 6PFE/2018-PERFORM-TEX-PEL]; Nucleu LAPLAS VI Program [16N/08.02.2019]

    Keywords: EPDM; electron beam irradiation; nanosilica; crosslinking; mechanical properties; contact angle; water uptake

    Composites based on ethylene-propylene-diene terpolymer (EPDM), butyl/halobutyl rubber and nanosilica were prepared by melt mixing and subjected to different doses of electron beam irradiation. The effect of irradiation dose on the mechanical properties, morphology, glass transition temperature, thermal stability and water uptake was investigated. The efficiency of the crosslinking by electron beam irradiation was analyzed by Charlesby-Pinner parameter evaluation and crosslink density measurements. The scanning electron microscopy data showed a good dispersion of nanosilica in the rubber matrix. An improvement in hardness and 100% modulus was revealed by increasing irradiation dose up to 150 kGy. The interaction between polymer matrix and nanosilica was analyzed using the Kraus equation. Additionally, these results indicated that the mechanical properties, surface characteristics, and water uptake were dependent on crosslink characteristics.
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