模拟湿润炎热气候氙灯试验下的PP+EPDMTD20和TPV 老化性能研究  

Study on the Aging Performance of PP+EPDM-TD20 and TPV under XenonLamp Test Simulating Moist and Hot Climate

作　　者：闵全钊 钱银超 杨万庆 李星 MIN Quanzhao;QIAN Yinchao;YANG Wanqing;LI Xing(Automotive Engineering Research Institute,Guangzhou Automobile Group Company Limited,Guangzhou 511434,China;Reliability and Environmental Engineering Institute,GRG Metrology&Test Group Company Limited,Guangzhou 510656,China)

机构地区：[1]广州汽车集团股份有限公司汽车工程研究院,广东广州511434 [2]广电计量检测集团股份有限公司可靠性与环境工程研究所,广东广州510656

出　　处：《汽车实用技术》2024年第7期139-142,共4页Automobile Applied Technology

摘　　要：PP+EPDM-TD20和热塑性硫化橡胶(TPV)广泛应用于汽车外饰件的制造,高分子材料的性能退化在湿润炎热气候下更加严重。文章通过对PP+EPDM-TD20和TPV进行模拟湿润炎热气候下的氙灯试验,研究了这两种高分子材料外观及力学性能的变化趋势。实验结果表明,两种材料在1600 h氙灯照射下,灰度、色差、硬度基本保持不变,光泽度保持率、拉伸强度保持率以及断裂伸长率呈近似指数下降趋势,PP+EPDM-TD20的弯曲模量呈近似指数上升趋势,而TPV呈近似指数下降趋势,拟合出的老化方程可为后续定量研究汽车外饰件的性能退化提供重要的参考价值。PP+EPDM-TD20 and thermoplastic vulcanizate(TPV)are widely used in the manufacturing of automotive exterior trims,and the performance degradation of polymer materials is more severe in moist and hot climate.Changing trends of the appearance and mechanical properties of PP+EPDM-TD20 and TPV are studied under xenon lamp test simulating moist and hot climate in this paper.The experimental results indicate that the gray scale,color difference and hardness of the two polymer materials basically remains unchanged,the gloss retention rate,tensile strength retention rate and breaking elongation show an approximate exponential downward trend,the flexural modulus of PP+EPDM-TD20 show an approximate exponential upward trend,while TPV shows an approximate exponential downward trend under 1600 h xenon lamp irradiation.The fitted aging equation can provide important reference value for subsequent quantitative research on the performance degradation of automotive exterior trims.

关 键 词：PP+EPDM-TD20 TPV 湿润炎热气候 氙灯试验 老化性能 

分 类 号：TQ32[化学工程—合成树脂塑料工业] U466[机械工程—车辆工程]