摘要
利用DSC(扫描示差量热仪)、应力应变仪、扫描电镜等分析手段,详细分析了连接器高温时发生形变的原因。结果表明:PBT+15%玻纤产品玻纤含量低尺寸稳定性较差;注塑时PBT+15%玻纤产品的内部结晶度较高且模具内部温度分布不均导致产品内部产生较大内应力,低温下内应力被冻结,高温下内部应力释放导致产品收缩产生较大弯曲。
In this paper,the causes of deformation of connectors at high temperature were analyzed in detail,by means of DSC,stress strain gauge and SEM.The results showed that PBT+15%glass fiber composite had poor dimensional stability due to low content of glass fiber.When injection molding,the internal crystallinity of the composite was high and the temperature distribution inside the mold was uneven,which leads to the internal stress of the composite.The internal stress was prevented at low temperature but released at high temperature,which leads to the shrinkage and bending of the composite.
作者
邓克俭
夏姗姗
刘滨
DENG Ke-jian;XIA Shan-shan;LIU Bin(CEPREI Certification Body,Guangzhou 510610,Guangdong,China)
出处
《合成材料老化与应用》
2020年第5期40-41,172,共3页
Synthetic Materials Aging and Application
关键词
连接器
注塑件
弯曲变形
失效分析
connector
injection molded parts
bending deformation
failure analysis
