塑料弯曲强度不确定度的评定  

Evaluation of Uncertainty in Plastic Flexural Strength

作　　者：金晶 石景丽 石巧英 JIN Jing;SHI Jingli;SHI Qiaoying(Shanghai Sunny Technology Co.,Ltd.,Shanghai 201109,China)

机构地区：[1]上海日之升科技有限公司,上海201109

出　　处：《上海塑料》2021年第4期55-58,共4页Shanghai Plastics

摘　　要：采用电子万能试验机依据GB/T 9341—2008《塑料弯曲性能的测定》测试了聚丙烯注塑样条的弯曲强度,分析了由测量重复性、施加的力、试样宽度和试样厚度四个影响因素所产生的不确定度。结果表明:测量重复性对注塑样条弯曲强度测量结果的不确定度影响最大。The flexural strength of polypropylene injection samples was tested by electron universal testing machine,according to GB/T 9341—2008 Plastics-Determination of flexural properties.The uncertainty caused by four factors including measurement repeatability,applied force,sample width,and sample thickness was analyzed.The results show that the measurement repeatability has the greatest influence on the measurement uncertainty of the flexural strength of injection samples.

关 键 词：弯曲强度 扩展不确定度 电子万能试验机 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]