Lee, CS Jho, JY Choi, K Hwang, TW 2024-01-21T07:37:24Z 2024-01-21T07:37:24Z 2021-09-02 2004-02 1598-5032 https://pubs.kist.re.kr/handle/201004/137891 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. English SPRINGER RELAXATIONS Dynamic mechanical behavior of ultra-high molecular weight polyethylene irradiated with gamma rays Article 10.1007/BF03219007 1 MACROMOLECULAR RESEARCH, v.12, no.1, pp.141 - 143 MACROMOLECULAR RESEARCH 12 1 141 143 scie scopus kci ART000946426 000220060800020 2-s2.0-1642265762 Polymer Science Polymer Science Article RELAXATIONS polyethylene ultra-high molecular weight dynamic mechanical analysis irradiation crosslinking