Dynamic mechanical behavior of ultra-high molecular weight polyethylene irradiated with gamma rays

被引：15
|
作者：
Lee, CS
Jho, JY [1 ]
Choi, K
Hwang, TW
机构：
[1] Seoul Natl Univ, Hyperstructured Organ Mat Res Ctr, Seoul 151744, South Korea
[2] Seoul Natl Univ, Sch Chem Engn, Seoul 151744, South Korea
[3] Korea Inst Sci & Technol, Biomed Res Ctr, Seoul 136791, South Korea
[4] Hyundai Motor Co, Div Res & Dev, Kyunggi 445850, South Korea
[5] Kia Motors Corp, Kyunggi 445850, South Korea
来源：
MACROMOLECULAR RESEARCH | 2004年 / 12卷 / 01期
关键词：
polyethylene; ultra-high molecular weight; dynamic mechanical analysis; irradiation; crosslinking;
D O I：
10.1007/BF03219007
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
We have investigated the dynamic mechanical behavior of ultra-high molecular weight polyethylene (UHMWPE) irradiated with varying doses of gamma rays. A relaxation peak in the loss factor curve, which has not been reported previously in the literature, is observed at a temperature above the crystal ruching temperature. The peak is unique to UHMWPE and appears to be related to the high degree of entanglement. Because the temperature and intensity of the peak are reduced by irradiation-induced chain scission and crosslinking, respectively, we believe that the peak is associated with disentanglement relaxation. The behavior of the storage modulus in the melt state agrees with the classical theory of rubber elasticity.
引用
收藏
页码：141 / 143
页数：3
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