辐射交联超高分子量聚乙烯热稳定性及蠕变性能  

Thermal stability and creep properties of radiation crosslinked ultra-high molecular weight polyethylene

作　　者：文鑫 严坤 李雪丽 王小俊[1] 王雨乔 杨晨光 WEN Xin;YAN Kun;LI Xueli;WANG Xiaojun;WANG Yuqiao;YANG Chenguang(Key Laboratory of Textile Fiber and Products,Ministry of Education,Wuhan Textile University,Wuhan 430200,China;Wuhan Guide Infrared Co.,Ltd.,Wuhan 430205,China)

机构地区：[1]武汉纺织大学纺织纤维及制品教育部重点实验室,武汉430200 [2]武汉高德红外股份有限公司,武汉430205

出　　处：《辐射研究与辐射工艺学报》2022年第1期39-47,共9页Journal of Radiation Research and Radiation Processing

基　　金：2021年武汉纺织大学研究生创新基金项目和2021年武汉纺织大学大学生创新创业训练计划项目资助。

摘　　要：本文研究了γ射线对超高分子量聚乙烯(UHMWPE)热稳定性和抗蠕变性能的影响规律。首先,将常规UHMWPE粉末通过硫化成型机热压成1 mm厚的板材,采用γ射线对板材样品进行辐照处理,研究辐照后样品的化学结构、热稳定性、微观形貌以及拉伸和蠕变性能的变化。结果表明:γ射线辐照后,熔点和结晶度增加,热稳定性提升,凝胶含量最高可达89%,分子链运动能力下降。相比于未辐照样品,抗蠕变性提高近40%。本工作通过辐射交联改性,显著提高了UHMWPE的热稳定性和抗蠕变性能,这为制备高抗蠕变和高热稳定性UHMWPE材料提供了方法。The effects ofγ-ray irradiation on the thermal stability and creep resistance of ultra-high molecular weight polyethylene(UHMWPE)were studied.First,UHMWPE powder was hot pressed into 1 mm thick sheets using a vulcanization molding machine.The chemical structure,thermal stability,microstructure,tensile properties,and creep properties of the irradiated plate samples were studied.The results demonstrated that,afterγ-ray irradiation,the melting points,crystallinity,and thermal stability increased;the gel content increased to 89%;and the motility of molecular chains decreased.Compared with the creep resistance of the unirradiated sample,that of the irradiated sample increased by approximately 40%.In this study,the thermal stability and creep resistance of UHMWPE were significantly improved via the radiation cross-linking process,which provided a method for the preparation of UHMWPE materials with high creep resistance and high thermal stability.

关 键 词：超高分子量聚乙烯 Γ射线辐照 热稳定性 蠕变性能 拉伸性能 

分 类 号：TL13[核科学技术—核能科学]