The Study on the Stress and Photo-Oxidative Aging of Polyethylene Cable Sheath Under Different Processing Conditions

Wenxuan Hu; Changqing Liu; Wenjun Liu; Xiancheng Ren

Macromolecular Research, Vol.26, No.5, 426-437, May, 2018

DOIDOI 10.1007/s13233-018-6052-9 Export Citation

The Study on the Stress and Photo-Oxidative Aging of Polyethylene Cable Sheath Under Different Processing Conditions

Wenxuan Hu, Changqing Liu, Wenjun Liu, and Xiancheng Ren^†

College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, Sichuan, P. R. China

E-mail:

High-density polyethylene (HDPE) materials were processed into specimens under different processing conditions in this paper. Then specimens were aged under stress and ultraviolet (UV) light in an aging box, and the aging behaviors were studied by means of surface morphology observation, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC) and X-ray diffraction (XRD). It was found that the aging properties of sheath materials were associated with the crystallinity of surface layer. Samples in lower extrusion temperature system and higher extrusion rate had lower surface layer crystallinity and better anti-aging properties. In addition, the stress and photo-oxidative aging mechanism were explored. There were two stages in the stress and photo-oxidative aging, which was reflected in the surface layer that crystallinity increased firstly and then decreased. This study may provide better processing conditions for cable sheath materials.

Keywords:polyethylene;photo-oxidative aging;cracking;processing conditions;strain

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[2] Wu S, Zhang J, Xu X, Polym. Int., 9, 1527 (2003)

[3] Jueming Y, Eng. Plast. Appl., 3, 42 (2005)

[4] He G, Synthetic Materials Aging and Application, 2, 36 (1998)

[5] Zielnik A, Environ. Technol., 3, 40 (2006)

[6] Park JS, Gwon SJ, Lim YM, Nho YC, Macromol. Res., 8, 580 (2009)

[7] Horikawa Y, Konakahara N, Imai T, Kentaro A, Kobayashi Y, Sugiyama J, Polym. Degrad. Stabil., 98, 2351 (2013)

[8] Wunderlich B, Macromolecular Physics, Academic Press, New York, 1980.

[9] Chen BY, Wang XD, Zhang YX, China Plastics., 8, 54 (2009)

[10] Li Y, Liu W, Ren X, Polym. Eng. Sci., 10, 2277 (2015)

[11] Keating M, Lee IH, Wong CS, Thermochim. Acta, 284(1), 47 (1996)

[12] Mandelkern L, Crystallization of Polymers, Equilibrium Concepts, Vol.1, Cambridge University Press, Cambridge, 2002.

[13] Song SJ, Feng JC, Chinese Polym. Bull., 3, 15 (2008)

[14] Zhang F, Fu Q, Lu T, Polym. Commun., 43, 1031 (2002)

[15] Xiaozhou L, Rongbo L, China Synth. Resin Plast., 5, 62 (2012)

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[18] Yoon D, J. Appl. Crystallogr., 11, 531 (1978)

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[21] Rabello MS, White JR, Chemi-Crystallization, Polym., 26, 6379 (1997)

[22] Ogier L, Rabello MS, White JR, J. Mater. Sci., 9, 2364 (1995)

[23] Rabello MS, White JR, Polym. Degrad. Stabil., 56, 55 (1997)

[24] Rabello MS, White JR, Polym. Compos., 5, 691 (1996)

[25] Stark NM, Matuana LM, Polym. Degrad. Stabil., 86, 1 (2004)

[26] Singh A, Radiat. Phys. Chem., 56, 375 (1999)

[27] Mo ZS, Zhang HF, Structure of Crystalline Polymers by X-Ray Diffraction, Science Press, 2003.