聚酯泡沫反射片的热机械分析  

Thermolmechnical Analysis of Polyester Reflector Films

作　　者：庞博[1,2] 王晓鸿[1] 杨慎东 孙学武 

机构地区：[1]特种显示技术教育部重点实验室,特种显示技术国家工程实验室,现代显示技术省部共建国家重点实验室培育基地,合肥工业大学光电技术研究院,安徽合肥230009 [2]合肥工业大学化学与化工学院,安徽合肥230009 [3]翰博高新材料(合肥)股份有限公司,安徽合肥230011

出　　处：《广州化工》2014年第21期93-95,共3页GuangZhou Chemical Industry

摘　　要：聚酯泡沫反射片以其良好的综合性能在当前液晶显示背光系统中占据主导地位。拉伸取向的聚酯膜在加热时容易产生变形,导致光学不均匀。本文对两种液晶反射片的形貌,高温下的尺寸稳定性,动、静态热机械性能进行了系统研究。结果表明聚酯反射片在加热的过程中先膨胀后收缩,在温度低于Tg时膨胀,温度高于Tg时收缩。膨胀和收缩率大的反射片更容易发生翘曲变形。Polyester foam was a dominate core material in making reflector in back light unit of liquid crystal and displayed its good optical and mechanical performances. Stretched oriented polyester film was easily deformed during the heating,resulting in optical in homogeneity. The morphology,dimensional stability at high temperatures,dynamic and static thermomechanical properties of the two reflector sheet were studied systematically. The results showed that during a heating process,the polyester reflector sheet expanded as the temperature was below its Tg and then shrunk as the temperature was over its Tg. The sheets with higher expansion and shrinkage rate were more prone to warpage.

关 键 词：液晶反射板 热稳定性 聚酯泡沫 

分 类 号：TQ317.2[化学工程—高聚物工业]