【作者】 尹学武； 兰建武； 陈科； 陈胜；

【Author】 YIN Xue-wu1,LAN Jian-wu1,CHEN Ke1,CHEN Sheng 1,1College of Light Industry,Textile & Food Engineering,Sichuan University,Chengdu 610065,Sichuan,China

【机构】 四川大学轻纺与食品学院；

【摘要】 为了制备高强度的聚甲醛纤维,在聚甲醛(POM)中添加少量的聚乙二醇(PEG),利用PEG影响POM的结晶过程。通过光学解偏振法、偏光显微镜观察(PLM)研究了聚甲醛(POM)与不同分子量的聚乙二醇(PEG)的不同比例共混物的等温结晶行为,以及通过单纤强力测试仪、示差扫描量热分析(DSC)测试分析了共混物纤维样品的力学性能、熔融温度与结晶度。结果表明:PEG的加入能够加快POM的结晶,快速结晶温度升高,晶粒生长尺寸减小;纤维断裂强度随着PEG加入比例的增加先降低后升高,分子量为2000的PEG与POM混合比为1/99时,强度可比相同条件下未共混的POM纤维提高7%左右。更多还原

【Abstract】 In order to obtain high strength Polyoxymethylene(POM) fiber,a certain amount of Polyethylene glycol(PEG) was added into(POM) to affect its crystallizing process.The isothermal crystallization behaviors,melting temperatures and mechanical properties of POM with PEG were studied by the optical depolarization,polarized-light microscopy(PLM),single fiber strength tester and differential scanning calorimetry(DSC).The results showed that the crystallization rate of POM was increased after PEG joined and the size of crystal decreased.The breaking strength of modification POM fiber decreased firstly and then increased with the increase of PEG.The strength increased about 7% when molecular weight of PEG was 2000 and PEG/POM was 1/99.更多还原