不同负荷下UHMWPE纤维的热老化性能及其机理研究  

Thermal aging properties and mechanism of UHMWPE fibers under different loads

作　　者：胡高强 夏兆鹏[1] 张海宝 王瑞[1] 刘雍[1] 王亮[1] 潘佳俊 卢杨 赵吉林 王学农 Hu Gaoqiang;Xia Zhaopeng;Zhang Haibao;Wang Rui;Liu Yong;Wang Liang;Pan Jiajun;Lu Yang;Zhao Jilin;Wang Xuenong(School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China;Qinghai Fibre Inspection Bureau,Xining 810001,China)

机构地区：[1]天津工业大学纺织科学与工程学院,天津300387 [2]青海省纤维检验局,青海西宁810001

出　　处：《产业用纺织品》2022年第2期22-28,36,共8页Technical Textiles

基　　金：国家市场监督管理总局技术保障专项项目(2019YJ043)。

摘　　要：为研究热、力复合作用对海洋绳用UHMWPE纤维老化性能的影响,在人工加速热老化的条件下,同时增加负荷为纤维断裂强力0、10%、30%、50%的持续受力因素,探究热、力复合作用对纤维性能的影响。采用单纤维强力仪、差示扫描量热仪、红外光谱仪和扫描电子显微镜对纤维的力学性能、热学性能、纤维结构及表面形貌进行表征与分析。结果表明:随着相对断裂强力的增加,纤维表面变得粗糙并有缺陷生成,力学性能呈下降趋势;当相对断裂强力由10%增加到30%时,纤维力学性能下降最快,干热条件下UHMWPE纤维的断裂强力下降25.71%,这与此阶段纤维结晶度下降最快相一致,但并没有生成新的物质。In order to study the effect of combined heat and force on the aging properties of ultra-high molecular weight polyethylene(UHMWPE)fibers for marine ropes,the artificially accelerated thermal ageing conditions were used to investigate the effect of combined heat and force on fiber properties by simultaneously increasing the load to 0,10%,30%and 50%of the fracture strength of the fibers as a continuous force factor.The mechanical property,thermal property,fiber structure and surface morphology of the fibers were characterized and analyzed by single fiber strength tester,differential scanning calorimeter,infrared spectroscopy and scanning electron microscope.The results show that with the increase of the relative breaking strength,the surface of the fiber becomes rough and defects are formed,and the mechanical properties show a downward trend;when the relative breaking strength increases from 10%to 30%,the mechanical properties of the fiber decrease the fastest;the breaking strength of the lower UHMWPE fibers decrease by 25.71%under the dry heat condition,which is consistent with the fastest decrease of fiber crystallinity at this stage,but no new substance is formed.

关 键 词：超高相对分子质量聚乙烯纤维 热老化性能 热、力复合作用 相对断裂强力 力学性能 

分 类 号：TS151.9[轻工技术与工程—纺织材料与纺织品设计]