聚苯乙烯片材力学行为研究:温度梯度下的性能演变与机理分析  

Study on the mechanical behavior of polystyrene sheets:performance evolution and mechanism analysis under temperature gradient

作　　者：王易 曾科 Wang Yi;Zeng Ke(Inner Mongolia Yili Industrial Group Co.,Ltd.)

机构地区：[1]内蒙古伊利实业集团股份有限公司 [2]伊利集团上海创新中心

出　　处：《塑料包装》2025年第2期64-67,共4页Plastics Packaging

摘　　要：本文详细研究了温度、湿度对聚苯乙烯(PS)片材性能的影响,特别是针对片材使用时会出现裂纹进行了深入分析。实验结果表明,70℃环境下存储24小时的PS片材的力学性能明显降低,同时该温度存放后再次使用易出现裂纹现象,在实际应用中,建议避免将材料暴露在过高温度(如70℃)下,以免降低其延展性,在30℃环境下,片材表现出最佳的综合性能(最大应力和断裂伸长率均较高),对于需要较高强度和延展性的应用场景,建议在30℃左右的环境中使用该材料。This article provides a detailed study on the effects of temperature and humidity on the properties of polystyrene(PS)sheets,with a particular focus on the in-depth analysis of cracks that may occur during sheet use.The experimental results show that the mechanical properties of PS sheets stored at 70℃for 24 hours are significantly reduced,and cracks are prone to occur when reused at this temperature.In practical applications,it is recommended to avoid exposing the material to excessively high temperatures(such as 70℃)to reduce its ductility.At 30℃,the sheet exhibits the best comprehensive performance(with high maximum stress and elongation at break).For application scenarios that require high strength and ductility,it is recommended to use the material in an environment around 30℃.

关 键 词：PS片材性能 断裂伸长率 温度 湿度 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]