4种尼龙材料在汽车冷却液中的高温老化性能研究  

Research on Thermal Aging Properties of Four Nylon Materials in Coolant

作　　者：许齐勇 庞承焕 李卫领 吴博 XU Qiyong;PANG Chenghuan;LI Weiling;WU Bo(Enterprise Technology Center of Kingfa Science & Technology Co., Ltd., Guangzhou Guangdong 510663, China;National Ploymer Materials Industry Innovation Center Co., Ltd.,Guangzhou Guangdong 510663, China;National Engineering Laboratory for Plastic Modification and Processing, Guangzhou Guangdong 510663, China)

机构地区：[1]金发科技股份有限公司企业技术中心,广东广州510663 [2]国高材高分子材料产业创新中心有限公司,广东广州510663 [3]塑料改性与加工国家工程实验室,广东广州510663

出　　处：《汽车零部件》2020年第8期3-5,共3页Automobile Parts

基　　金：国家重点研发计划项目(2019YFF0215502)。

摘　　要：研究了4种不同的尼龙材料在汽车冷却液中进行高温老化测试后的力学性能变化规律。试验中应用的汽车冷却液主要成分为乙二醇/水的混合物(体积分数为50%)和添加剂,测试温度为125℃,分别选用弯曲和冲击样条进行材料的老化测试,并对弯曲断裂样品进行了断面形貌分析。结果表明:尼龙材料在冷却液中高温老化后,弯曲强度快速下降,缺口冲击强度则呈现先增大后减小的趋势,扫描电镜下可以观察到玻纤与树脂基体的黏结能力变弱。The mechanical properties of four different nylon materials after thermal aging in coolant were studied.Main constituent of the coolant used is a mixture of water and ethylene glycol(volume fraction is 50%)and additives.Bending and impact samples were chosen to do thermal aging test at 125℃and then using SEM to analysis the cross section of bending samples.Test results show that after thermal aging in coolant,the bending strength of four nylon materials all decreased rapidly.Meanwhile,notch impact strength increased initially and then decreased.Moreover,SEM images show that the bonding ability between nylon and glass fibers became worse gradually.

关 键 词：高温老化 尼龙材料 汽车冷却液 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]