摘要
针对海岛熔融纺丝制备超细纤维时所产生的环境污染问题,按照不同比例将2种多元醇混合制成复配增塑体系,对具有水溶性的PVA进行增塑改性,制备可在250℃条件下进行熔融纺丝的热塑性PVA。通过流变性能分析、差示扫描量热分析(DSC)、热重分析(TG)、红外光谱分析(FTIR)等测试手段探究共混增塑体系对PVA流变性能、热学性能、氢键作用产生的影响。同时,分析不同纺丝速度对纤维的结晶度与力学性能的影响。结果表明:双醇共混增塑剂有效破坏了PVA内部氢键作用,降低了PVA的熔点,加大了热加工窗口;随着纺丝速度的提高,纤维的结晶度得到改善,预取向丝具有一定的强力。研究为实现绿色环保超细纤维复合纺丝提供参考。
In view of the current environmental pollution caused by the use of alkali treatment and benzene treatment in the preparation of microfibers by sea island melt spinning,two polyols were mixed in different proportions to make a compound plasticizer.The water-soluble PVA was plasticized and modified to prepare a thermoplastic PVA that can be melt-spinned at 250°C.Through rheological performance analysis,differential scanning calorimetry(DSC),thermogravimetric analysis(TG),infrared spectroscopy(FTIR)methods,the influence of the blending and plasticizing system on the rheological properties,thermal properties and hydrogen bonding of PVA was explored.Meanwhile,the effects of different spinning speeds on the crystallinity and mechanical properties of the fiber were studied.The plasticizer blended with two polyols effectively destroys the internal hydrogen bond of PVA,lowers the melting point of PVA and enlarges the thermal processing window.As the spinning speed increases,the crystallinity of the fiber is improved,so that the preoriented yarn has a certain strength.The study establishes a foundation for the preparation of green and environmentally friendly ultrafine fibers.
作者
张学睿
王亮
刘雍
宋兵
钱晓明
ZHANG Xuerui;WANG Liang;LIU Yong;SONG Bing;QIAN Xiaoming(School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China;Mingxin Xuteng(Jiangsu)Innovation Research Institute Limited Company,Xinyi 221433,Jiangsu,China)
出处
《纺织高校基础科学学报》
CAS
2022年第1期109-114,共6页
Basic Sciences Journal of Textile Universities
基金
天津市自然科学基金(18JCQNJC71600)。
关键词
聚乙烯醇
共混改性
复配增塑剂
海岛熔融纺丝
热塑加工
polyvinyl alcohol
blending modification
compound plasticizer
melt spinning
thermoplastic processing
