The effect of radiation cross-linking on the mechanical properties of polyethylene sheets

The high density polyethylene (HDPE) sheets thickness 3mm were irradiated by 60Co γ-ray. Its gel fraction increases with increasing dosage. The melt index of irradiated samples decreases significantly with dosage from 1 kGy to 12kGy and the number average molecular weight of samples increases linear...

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Bibliographic Details
Published in:International journal of radiation applications and instrumentation. Part C, Radiation physics and chemistry Radiation physics and chemistry, 1987, Vol.29 (3), p.175-177
Main Authors: Dongyuan, Liu, Lianshui, Zhang, Yaqi, Wang, Wenxiu, Chen
Format: Article
Language:English
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Summary:The high density polyethylene (HDPE) sheets thickness 3mm were irradiated by 60Co γ-ray. Its gel fraction increases with increasing dosage. The melt index of irradiated samples decreases significantly with dosage from 1 kGy to 12kGy and the number average molecular weight of samples increases linearly. The mechanical properties including yield strength, breaking strength and breaking elongation percentage of irradiated HDPE sheets increase at low doses and then decrease at high doses. All of them have a peak value at 180 kGy. The Young's modulus of samples also increases linearly with increasing dosage. The aging tests of samples in irradiation doses of 180 and 360 kGy were carried out respectively and compared with non-irradiated samples.
ISSN:1359-0197
1878-1020
DOI:10.1016/1359-0197(87)90112-3