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Study on electron‐beam‐irradiated (linear low‐density polyethylene)/(soya powder) blends under outdoor exposure
Author(s) -
Sam S.T.,
Ismail H.,
Ahmad Z.
Publication year - 2012
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.20327
Subject(s) - crystallinity , ultimate tensile strength , materials science , irradiation , elongation , polyethylene , composite material , degradation (telecommunications) , linear low density polyethylene , low density polyethylene , natural rubber , nuclear chemistry , chemistry , telecommunications , physics , computer science , nuclear physics
Linear low‐density polyethylene was blended with soya powder, and the blends were compatibilized with epoxidized natural rubber having 50 mol% of epoxidation. The content of soya powder was varied from 0 to 40 wt%. The blends were irradiated at 30 kGy with an electron beam. Degradation of the irradiated blends was evaluated by exposing the samples to an outdoor environment according to ISO 877.2. The degradation was monitored by changes in the tensile, morphological, and thermal properties, as well as the molecular structure and weight loss. The tensile strength and elongation at break (Eb) of the exposed samples decreased as a function of exposure period. The irradiated blends exhibited higher retention of tensile strength and Eb than nonirradiated blends after 1 year of exposure. The crystallinity of the irradiated blends increased upon exposure, though the nonirradiated blends showed higher crystallinity indicating higher degradability. Weight loss of the irradiated blends showed less change after 6 months of outdoor exposure, but significant change was observed after 1‐year exposure. The molecular weight changes of the irradiated blends exhibited the same trend as weight loss. All the results confirmed that the degradability of the irradiated blends was comparable to that of the nonirradiated blends upon long‐term outdoor exposure. J. VINYL ADDIT. TECHNOL., 2012. © 2012 Society of Plastics Engineers