锦纶6/聚偏二氟乙烯共混纤维的非等温结晶行为The Non-isothermal Crystallization Behavior of PA6/PVDF Blend Fibers
林永坤,赵耀明
LIN Yong-kun,ZHAO Yao-ming(School of Materials Science and Engineering
摘要(Abstract)：
采用差示扫描量热法(DSC)研究了熔融纺丝法制备的锦纶6(PA6)/聚偏二氟乙烯(PVDF)共混纤维的非等温结晶行为,并利用修正Avrami方程的Jeziorny法和R-t法对其结晶动力学进行分析。结果表明,由于PVDF的黏度大,且PVDF中的氟原子能与PA6的酰胺键形成氢键,阻碍了PA6分子链在结晶过程中的运动,导致共混纤维的结晶温度和结晶速率比纯PA6纤维低,半结晶时间比PA6大,且随着PVDF含量的增加,其变化更为明显。
The non-isothermal crystallization behavior of the PA6/PVDF blend fibers prepared by melt spinning was studied by differential scanning calorimetry(DSC) and the crystallization kinetics were analyzed by Jeziorny,R-t methods based on modified Avrami equations.The results showed that the crystallization temperature and rate of blend fibers were lower than that of pure PA6 fiber,half-crystallization time was longer than that of PA6.This was attributed to the high viscosity of PVDF and the strong hydrogen bond between fluoride element of PVDF and amide bond of PA6,which prevented the mobility of PA6's molecular chain during crystallization.The non-isothermal crystallization behavior of PA6/PVDF was useful in the fiber spinning and performance optimization.
关键词(KeyWords)：
锦纶6;聚偏二氟乙烯;共混纤维;非等温结晶
PA6,PVDF,blending fiber,non-isothermal crystallization
基金项目(Foundation):
作者(Author):
林永坤,赵耀明
LIN Yong-kun,ZHAO Yao-ming(School of Materials Science and Engineering
参考文献(References)：
- [1]赖志峰.锦纶6纤维的生产技术及其发展趋势[J].广东化纤,2001,(1):29-31.
- [2]张士林,范孜娟.聚偏氟乙烯树脂性能和加工应用[J].工程塑料应用,2005,33(4):67-69.
- [3]卓震.聚偏二氟乙烯(PVDF)特性及其在过程工业中应用[J].腐蚀科学与防护技术,2004,16(2):118-120.
- [4]Zhehui Liu,Philippe Marechal,Robert Jerome.Melting and crystallization of Poly(vinylidene fluoride)blended with polyamide6[J].Polymer,1997,38(20):5149-5153.
- [5]周菊,田彦文等.MC尼龙6/纳米ZnO复合材料的非等温结晶行为[J].东北大学学报(自然科学版),2008,29(1):100-104.
- [6]叶云婷,张玉梅等.稀土发光聚己内酰胺非等温结晶动力学研究[J].东华大学学报(自然科学版),2006,32(1):1-6.
- [7]殷敬华,莫志深主编.现代高分子物理学(上册)[M].北京:科学出版社,2001.
- [8]Andrzej Jeziorny.Parameters characterizing the kinetics of the non-isothermal crystallization of poly(ethylene terephthalate)determined by DSC[J].Polymer,1978,19:1142-1144.
- [9]Z H Liu,Ph Marechal,R Jerome.Blends of poly(vinylidene fluoride)with polyamide6:interfacial adhesion,morphology and mechanical properties[J].Polymer,1998,39(10):1779-1785.
- [10]An Y,Do L,Mo Z.Nonisothermal melt and cold crystallization kinetics of poly(aryl ether ether ketone)[J].J Polym Sci,1999,37(5):443-450.