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2024 04 v.50;No.272 76-82
对位芳纶的结构与缺陷对其力学性能的影响
基金项目(Foundation): 国家重点研发计划(2021YFB3700102)
邮箱(Email): cqteng@dhu.edu.cn;
DOI: 10.19886/j.cnki.dhdz.2023.0308
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;宁夏泰和芳纶纤维有限责任公司;泰和新材集团股份有限公司;

摘要(Abstract):

聚对苯二甲酰对苯二胺(PPTA)纤维具有优异的力学性能、耐化学腐蚀性能以及阻燃性能,在航空航天、国防、民用等领域得到了广泛应用,是一种新型战略性材料。对4种不同规格的对位芳纶的力学性能、相对分子质量、聚集态结构以及纤维表面及内部缺陷进行研究,建立纤维结构、缺陷与性能之间的关系。结果表明:在具有相同化学分子结构的前提下,聚合物相对分子质量是影响纤维力学性能的重要因素之一,随着相对分子质量的增加,纤维的强度和模量增加。对位芳纶的拉伸强度主要与其结晶度、取向度、表面缺陷以及内部微孔缺陷有关,其中结晶度和微孔缺陷最为重要。纤维的模量主要与纤维的取向度有关,结晶度及纤维内外部缺陷对纤维模量的影响较小。

关键词(KeyWords): 聚对苯二甲酰对苯二胺(PPTA)纤维;;相对分子质量;;聚集态结构;;缺陷;;力学性能
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基本信息:

DOI:10.19886/j.cnki.dhdz.2023.0308

中图分类号:TQ342.722

引用信息:

[1]路慧颖,唐凯,雒瑞银等.对位芳纶的结构与缺陷对其力学性能的影响[J].东华大学学报(自然科学版),2024,50(04):76-82.DOI:10.19886/j.cnki.dhdz.2023.0308.

基金信息:

国家重点研发计划(2021YFB3700102)

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