城轨车辆单组分聚氨酯失效性和相容性研究  

Study on bonding failure and compatibility of one component polyurethane for urban rail vehicles

作　　者：徐凤林 李清泉 蔡洋涛 方骅 陈鋆 李青青 张玲玉 吴梦杰 田玉龙 张敬芬 张彧贤 XU Fenglin;LI Qingquan;CAI Yangtao;FANG Hua;CHEN Jun;LI Qingqing;ZHANG Lingyu;WU Mengjie;TIAN Yulong;ZHANG Jingfen;ZHANG Yuxian(CRRC Hangzhou Co.,Ltd.,Hangzhou 311223,China;Yifa New Materials Institute,Changzhou,213025,Jiangsu China)

机构地区：[1]杭州中车车辆有限公司,浙江杭州311223 [2]逸发新材料研究院,江苏常州213025

出　　处：《粘接》2022年第7期48-52,共5页Adhesion

摘　　要：采用试验控制变量法对单组份聚氨酯失效性和相容性进行研究,针对基材表面进行不同的前处理,根据试验结果表明,单组分聚氨酯失效性因素为不涂底涂、不打磨、不清洁,在老化试验后都出现粘附破坏,导致粘接强度降低;基材表面氧化层、污染、油膜、脱模剂、胶衣等若不去除干净对粘接性能影响很大;若金属表面阳极氧化未及时防护,出现表面污染、氧化等也将降低粘接强度。单组分聚氨酯相容性特性研究结果表明:单组分湿气固化聚氨酯在不涂底涂前提下相容性良好,但粘接强度等级不同的单组分聚氨酯相容性较差。The invalidity and compatibility of one component polyurethane were studied by using the method of test control variables.Different pretreatment was carried out for the surface of the substrate.According to the test results,the invalidity factors of one component polyurethane were no primer,no grinding,and no cleaning.After the aging test,adhesion failure occurred,resulting in the reduction of bonding strength;if the oxide layer,pollution,oil film,release agent,gel coat,etc.on the surface of the substrate are not removed,the bonding performance will be greatly affected;if the anodic oxidation of the metal surface is not protected in time,surface pollution,oxidation,etc.will also reduce the bonding strength.The results of the study on the compatibility characteristics of one component polyurethane show that the one component moisture cured polyurethane has good compatibility without primer,but the one component polyurethane with different bonding strength grades has poor compatibility.

关 键 词：单组分聚氨酯 胶条剥离 相容性 失效性 

分 类 号：TQ430.771[化学工程]