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Influence of crosslinking on physical properties of low density polyethylene

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Abstract

Influence of crosslinking on physical properties of low density polyethylene was studied.The results indicated that, at low degrees of crosslinking, the network hardly affects the crystallinity, elastic modulus (E) and yielding stress while it improves the tensile strength and strain at break simultaneously. Tensile strength reaches a maximum of about 24 MPa at 1.5 phr dicumyl peroxide (DCP) then decreases to a constant value of about 18 MPa due to decrease of crystallinity. E reaches its maximum at 0.5 phr DCP corresponding to gel fraction of about 75% without marked change in crystallinity. The crosslinked polyethylene exhibits two yielding processes, and both yielding stresses approximately linearly depend on crystallinity.

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Authors and Affiliations

  1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China

    Xiao-hu Zhang, Hong-mei Yang  (杨红梅), Yi-hu Song & Qiang Zheng

  2. Key Laboratory of Macromolecular Synthesis and Functionalization of Ministry of Education, Zhejiang University, Hangzhou, 310027, China

    Hong-mei Yang  (杨红梅), Yi-hu Song & Qiang Zheng

Authors
  1. Xiao-hu Zhang
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  2. Hong-mei Yang  (杨红梅)
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  3. Yi-hu Song
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  4. Qiang Zheng
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Corresponding author

Correspondence to Hong-mei Yang  (杨红梅).

Additional information

The work was financially supported by the National Natural Science Fundation of China (No. 51073137).

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Zhang, Xh., Yang, Hm., Song, Yh. et al. Influence of crosslinking on physical properties of low density polyethylene. Chin J Polym Sci 30, 837–844 (2012). https://doi.org/10.1007/s10118-012-1194-3

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  • DOI: https://doi.org/10.1007/s10118-012-1194-3

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