基于MIV的聚碳酸酯大气老化影响因子权重分析  

Weight Analysis of Atmospheric Aging of Polycarbonate Impact Factors Based on MIV Method

作　　者：杨斌 李敬洋 文磊 YANG Bin;LI Jing-yang;WEN Lei(Materials Service Safety Assessment Facilities,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学国家材料服役安全科学中心,北京100083

出　　处：《材料工程》2018年第12期101-109,共9页Journal of Materials Engineering

基　　金：国家重点研发计划(SQ2017YFGX010042-5)

摘　　要：采用MIV(mean impact value)影响因子权重分析方法,以聚碳酸酯老化性能(色差、拉伸强度、断裂伸长率和弯曲强度)及相应的暴露时间、气候因素和环境因素数据为基础,以|MIV|值为评价依据,定量分析15种影响因子(暴露时间、温度、湿度、日照时数、降水量、风速、海盐离子浓度、SO2、HCl、NO2、H2S、硫酸盐化速率、NH3、非水溶性降尘量、水溶性降尘量)对聚碳酸酯老化性能影响的权重大小。结果表明:当MIV调节率从5%逐步递增至25%时,同种老化性能受同种影响因子的影响的权重变化不大,但老化性能对各影响因子的敏感度存在差异;气候因素和暴露时间对聚碳酸酯老化性能影响最大,环境因素中降尘量对聚碳酸酯老化性能影响较大;暴露时间是色差和断裂伸长率最主要影响因子,拉伸强度和弯曲强度受平均相对湿度影响最大。The mean impact value （MIV）method which is an effective factor weight analysis method was used to quantitatively analyze the effect weight of 15 impact factors on the aging properties of polycarbonate （chromatic aberration, tensile strength, elongation at break, and bending strength） and the corresponding exposure time, climatic factors and environmental factors. The impact factors were exposure time, mean temperature, humidity, sunshine hours, precipitation, wind speed, sea salt ion, SO 2, HCl, NO 2, H 2S, sulfation rate, NH 3, water soluble dust fall, and non-water soluble dust fall. The results show that with the regulation rate increasing from 15% to 25% gradually, for the certain aging property, the effect weight of certain impact factor change little, while the sensitivities of aging properties to various impact factors are different; the climatic factors and exposure time are the greatest factors influencing the aging properties of polycarbonate, among environmental factors, the influence of dust fall quantity on the aging properties is the largest; exposure time is the main impact factor influencing chromatic aberration and elongation at break, mean relative humidity has the greatest impact on tensile strength and bending strength.

关 键 词：聚碳酸酯 MIV 影响因子 老化性能 大气老化 

分 类 号：TB324[一般工业技术—材料科学与工程]