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2024 04 v.50;No.272 16-24
不同工艺制备的聚酯纤维在碱性条件下的结构性能变化规律
基金项目(Foundation):
邮箱(Email): zhangym@dhu.edu.cn;
DOI: 10.19886/j.cnki.dhdz.2023.0313
中文作者单位:

东华大学材料科学与工程学院,纤维材料改性国家重点实验室;浙江理工大学材料科学与工程学院;

摘要(Abstract):

为了解不同工艺制备的聚酯纤维在碱性条件下应用性能的变化规律,分别选择工业丝路线制备的高强(HT)聚酯工业丝和高速纺丝制备的全拉伸聚酯纤维(FDY)作为研究对象,采用人工加速的碱性热水环境(85℃)开展老化试验,研究纤维力学性能的变化规律,同时分别利用广角X射线衍射、小角X射线散射和特性黏度等方法对结晶、片晶堆砌以及化学结构等形态结构变化进行研究。结果表明,两种聚酯纤维在碱性水环境下的结构和性能变化可区分为三个阶段:初期受水和热的共同作用,纤维的断裂强度较明显减小,结晶度不变,取向度明显下降,归因于部分处于冻结的非晶区取向分子链段发生解取向而收缩;随后纤维断裂强度缓慢下降,非晶区分子链断裂,同时有少量新的结晶生成;后期断裂强度下降程度更加明显,且结晶度开始减小,特性黏度明显降低,分子链断裂成为主导因素。由于HT工业丝具有更高的结晶度与晶粒尺寸,水分子和OH~-的侵蚀作用受到抑制,这使其碱解反应速率变慢,力学性能变化程度低于FDY纤维,表明HT工业丝的抗碱解性能优于FDY纤维。

关键词(KeyWords): 聚酯纤维;;碱解;;结晶结构;;WAXD;;SAXS
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基本信息:

DOI:10.19886/j.cnki.dhdz.2023.0313

中图分类号:TQ342.2

引用信息:

[1]卫婷,陈康,张阳等.不同工艺制备的聚酯纤维在碱性条件下的结构性能变化规律[J].东华大学学报(自然科学版),2024,50(04):16-24.DOI:10.19886/j.cnki.dhdz.2023.0313.

基金信息:

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