合成材料老化与应用2025，Vol.54Issue(6)：4-7,77,5.
塑料弯曲性能测定用标准样品的不确定度评定
Uncertainty Evaluation of a Standard Sample for Determining Flexural Properties of Plastics
摘要
Abstract
Uncertainty evaluation is a core aspect in the development and value assignment of reference materials.In this study,a systematic analysis was conducted on the uncertainty sources associated with the characteristic values of the self-developed polypropylene-based reference material for flexural property determination.The main contributors include the reproducibility of the value assignment process,sample homogeneity,and long-term stability.In accordance with standards such as GB/T 15000.3-2023,each uncertainty component was quantitatively calculated and combined.The evaluation results indicate that the standard value of the flexural modulus is 1240 MPa,with a combined standard uncertainty of 50 MPa,an expanded uncertainty of 100 MPa(k=2),and a relative expanded uncertainty of 8.1%.The standard value of the flexural stress at the specified deflection is 28.7 MPa,with a combined standard uncertainty of 0.81 MPa,an expanded uncertainty of 1.7 MPa(k=2),and a relative expanded uncertainty of 5.9%.The entire uncertainty evaluation process is scientific,transparent,and yields reliable results,providing a solid basis for the practical application of this reference material in laboratory quality control,calibration of flexural testing equipment,and proficiency testing of inspection personnel.关键词
标准样品/不确定度评定/弯曲性能/聚丙烯/非均匀性/稳定性Key words
reference material/uncertainty evaluation/flexural properties/polypropylene/non-uniformity/stability分类
化学化工引用本文复制引用
YOU Hai-yun,YU Qiao-ling,WANG Ri-jian,CHEN Hong-yuan,HE Guo-shan,CHEN Xiao-yi,WANG Wan-juan,DAI Hui-zhao,YAN Jing-heng..塑料弯曲性能测定用标准样品的不确定度评定[J].合成材料老化与应用,2025,54(6):4-7,77,5.基金项目
广州市NQI-质量安全科技协同创新中心开放课题项目(GZNQI202405) （GZNQI202405）
广州市院士专家工作站(2024-D012) （2024-D012）
广州市科技计划项目(2023B04J0407). （2023B04J0407）
