热空气老化对橡胶地板布焊接接头性能的影响  

Effects of Hot Air Aging on Properties of Welded Joint of Rubber Floor Covering

作　　者：李刚卿 沈鹤飞 韩晓辉 徐智宝 赵民 姜代旬 郑自芹 梁景恒 LI Gangqing;SHEN Hefei;HAN Xiaohui;XU Zhibao;ZHAO Min;JIANG Daixun;ZHENG Ziqin;LIANG Jingheng(CRRC Qingdao Sifang Co.,Ltd,Qingdao 266111,China;No.52 Institute of China North Industries Group Yantai Branch Co.,Ltd,Yantai 264003,China)

机构地区：[1]中车青岛四方机车车辆股份有限公司,山东青岛266111 [2]中国兵器工业第五二研究所烟台分所有限责任公司,山东烟台264003

出　　处：《橡胶工业》2022年第11期856-861,共6页China Rubber Industry

摘　　要：研究热空气老化(70℃×14 d)对焊接参数不同的Ⅰ和Ⅱ组橡胶地板布焊接接头性能的影响以及进行焊接接头焊缝的差示扫描量热(DSC)和拉曼光谱分析。热空气老化试验得出,Ⅰ组橡胶地板布焊接接头的拉伸试样从焊缝处熔断,Ⅱ组橡胶地板布焊接接头的拉伸强度减小12%;DSC分析得出,Ⅰ组橡胶地板布焊接接头焊缝在65.6℃时热流率发生转变,在67.2℃时存在明显吸热峰,即焊缝发生粘流态转变,Ⅱ组橡胶地板布焊接接头焊缝和Ⅰ组橡胶地板布焊接接头母材在25~110℃中均未见明显吸热峰;拉曼光谱分析得出,热空气老化后Ⅰ组橡胶地板布焊接接头焊缝在1056和1118 cm-1处的特征峰强度明显减小,这是热空气老化过程中橡胶分子链发生交联与裂解反应导致的。The effects of hot air aging(70℃×14 d)on the properties of the welded joints of groupsⅠandⅡrubber floor coverings with different welding parameters were studied,and the differential scanning calorimetry(DSC)and Raman spectroscopy analyses of the welded joint were carried out.The hot air aging test showed that,the welded joint of groupⅠrubber floor coverings melted from weld position,and the tensile strength of the welded joint of groupⅡrubber floor coverings decreased by 12%.The DSC analysis showed that,the heat flow rate of the welded joint weld of groupⅠrubber floor coverings changed at 65.6℃,and there was an obvious endothermic peak at 67.2℃,indicating that the weld had a viscous fluid state transition.There was no obvious endothermic peak in the welded joint of groupⅡrubber floor coverings and the base material of the welded joint of groupⅠrubber floor coverings in the temperature range of 25~110℃.Raman spectroscopy analysis showed that,after hot air aging,the characteristic peak intensities of the welded joint of groupⅠrubber floor coverings at 1056 and 1118 cm-1 decreased significantly,which was caused by the cross-linking and fracture reactions of the rubber molecular chains during hot air aging.

关 键 词：橡胶地板布 焊接接头 焊缝 热空气老化 拉伸强度 差示扫描量热 拉曼光谱 

分 类 号：TQ336.42[化学工程—橡胶工业] TQ330.73