退火对微注射成型超薄LLDPE制品的增强作用  

Reinforcement of Ultra-Thin LLDPE Parts of Micro-Injection Molding by Annealing

作　　者：石素宇[1,2] 许江伟[1] 潘亚敏[1] 郑国强[1] 

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450001 [2]河南工程学院材料与化学工程学院,河南郑州450007

出　　处：《现代塑料加工应用》2015年第1期1-4,共4页Modern Plastics Processing and Applications

基　　金：国家自然科学基金(51173171)资助

摘　　要：采用微注射成型技术制备了超薄线性低密度聚乙烯(LLDPE)制品,并在3个不同温度下进行退火。考察了退火前后LLDPE制品微结构和力学性能。拉伸测试结果表明:退火后,制品的拉伸强度和杨氏模量显著提高。利用差示扫描量热仪(DSC)、广角X射线衍射仪(WAXD)和傅里叶红外光谱仪(FTIR)对退火后制品微结构进行表征。通过分析微结构的变化,提出了退火对微注射成型超薄LLDPE制品的增强机理。Ultra-thin I.I.DPE parts were prepared by micro-injection molding, and then the parts were annealed at three different temperatures. Mechanical properties and micro- structure of the LLDPE parts before and after annealing were investigated comparatively. Tensile test result indicates that the tensile strength and Young＇s modulus of the parts are enhanced significantly. Microstructure of the parts after annealing was characterized by dif- ferential scanning calorimetry （DSC）, wide angle X-ray diffraction （WAXD） aim fourier transform infrared spectroscopy （FTIR）. Based on analysis of microstructure changes, re inforcement mechanism of ultra-thin LLPDE parts of micro-injection molding by annealing is proposed.

关 键 词：退火 微注射成型 线性低密度聚乙烯 增强 超薄制品 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]