经二氧化碳激光加热拉伸后聚酯长丝的力学性能和微观结构  

Mechanical Properties and Microstructure of Poly( Ethylene Terephthalate) Filament Drawn with Carbon Dioxide Laser Heating

作　　者：庄高磊[1] 张伟国[1] 田保中[1,2] 

机构地区：[1]苏州大学纺织与服装工程学院,江苏苏州215021 [2]苏州大学现代丝绸国家工程实验室,江苏苏州215123

出　　处：《高分子材料科学与工程》2014年第7期67-70,共4页Polymer Materials Science & Engineering

基　　金：江苏省自然科学基金资助项目(BK2009149);现代丝绸国家工程实验室资助项目(20102903)

摘　　要：用CO2激光对聚酯预取向丝(POY)进行加热拉伸,研究了拉伸倍数和激光器电流对聚对苯二甲酸乙二醇酯(PET)长丝的力学性能、分子构成和结晶度的影响。研究发现,PET长丝的断裂强度和结晶度随拉伸倍数和激光器电流的增大而增大,而断裂伸长率随之明显下降。当拉伸倍数为2.4,激光器电流为5 mA时,断裂强度由原来的2.445 cN/dtex增大到4.319 cN/dtex,结晶度由原来的26.45%增加到40.00%,断裂伸长率由原来的121.9%降至9.0%。傅里叶红外光谱分析结果表明,PET长丝的分子构成在激光加热拉伸前后没有明显变化。Poly（ethylene terephthalate） （PET） pre-oriented yarn （POY） was heated by carbon dioxide （CO2） laser while drawing it. The effects of draw ratio and laser current on the mechanical property, molecular composition and crystallinity of PET filament were studied. The results reveal that the breaking strength and crystallinity of PET filament increase and the breaking elongation decreases obviously as the draw ratio and laser current increasing. Compared to original PET filament, the breaking strength increases from 2.445 cN/dtex to 4.319 cN/dtex, crystallinity increases from 26.45 % to 40.00 % and breaking elongation decreases from 121.9 % to 9.0 % when the draw ratio is 2.4 and laser current is 5 mA. The Fourier transform infrared （FT-IR）, analysis shows that the molecular composition of PET filament remains unchanged after drawn with CO2 laser heating.

关 键 词：CO2激光 聚对苯二甲酸乙二醇酯 力学性能 结晶 

分 类 号：TQ342.21[化学工程—化纤工业]