遥控器导电胶键碳粒粘连的失效分析  

Analysis of Failure Mechanism about Adhesion of Conductive Carbons in Remote-controller

作　　者：刘建峰 吕锦銮 窦晓文 LIU Jian-feng;LV Jin-luan;DOU Xiao-wen(Gree Electric Appliances, Inc. of Zhuhai, Guangdong Zhuhai 519070, China)

机构地区：[1]珠海格力电器股份有限公司,广东珠海519070

出　　处：《广州化工》2019年第9期86-88,共3页GuangZhou Chemical Industry

摘　　要：针对某型号遥控器使用一段时间后出现转换按键无法回弹的问题,从导电胶键碳粒的材料、硫化工艺及其显微结构等方面进行分析。通过确定粘连处残留物的成分;对比发生粘连碳粒和正常碳粒、一次硫化碳粒和二次硫化碳粒的成分差异;对不同碳粒表面的结构进行观察。结果表明:残留物的成分与碳粒成分一致;碳粒粘连发生的原因为硅橡胶发生了老化,与其二次硫化不足有关;减小碳粒表面凹槽的直径,提高表面规整度可减弱其老化行为。For the problem of the switch button in a type remote-controller being unable to rebound after a period of time use, the materials, vulcanization technology and surface microscopic structures of the conductive carbons were analyzed, respectively. The residue composition on the adhesion area was characterized and analyzed. The differences of the compositions were compared between the adhesive carbon and normal carbon, also the carbons after the first vulcanization and the second vulcanization. The surface structures of different conductive carbons were observed. The results showed that the composition of the residue was the same as that of the conductive carbon. The immediate cause of the adhesion of conductive carbons was the cracking behavior of silicone rubber occurs, which was related to the insufficient of the secondary vulcanization degree. Reducing the pore diameter and improving the regularity of conductive carbon surfaces can effectively reduce the degree of the surface contacting with the air and weaken the aging behavior of the materials.

关 键 词：遥控器 导电碳粒 粘连 硫化工艺 裂解老化 

分 类 号：TQ336.5[化学工程—橡胶工业]