氯水老化pH值对氨纶结构与性能的影响Study on Structure and Properties of Spandex with Chlorination Aging in Different pH Values
游革新,祁灏,肖泽润
YOU Ge-xin,QI Hao,XIAO Ze-run
摘要(Abstract)：
为了研究氯水老化pH值对氨纶的影响,使用不同pH值的次氯酸钠溶液对氨纶进行老化处理,随后采用傅里叶变换红外光谱、X射线衍射、差示扫描量热及力学性能测试分析老化后样品的氢键化程度、微相分离程度、结晶性、热性能与拉伸性能。结果表明:氨纶氢键化程度、微相分离程度和硬段结晶度都随氯水p H值的降低而减弱。在热性能方面,随着氯水pH值的降低,氨纶的玻璃化转变温度与软段结晶熔融温度升高,软段结晶度减小。在拉伸力学性能方面,低pH值氯水处理后的氨纶表现出更小的断裂强力和断裂伸长率。
The influence of the pH value in chlorination aging on the internal hydrogen bond, microphase separation, crystallinity, thermal properties and mechanical properties of Spandex were studied by Fourier transform infrared spectrum, X-ray diffraction, different scanning calorimeter and mechanical tests after treating Spandex with sodium hypochlorite solutions in different pH values. The results show that the hydrogen bonding index, degree of microphase separation and the crystallinity of the hard section decrease with the decrease of the pH value of the chlorine solution. In the aspect of thermal properties, it shows that with the decrease with pH value of the chlorine solution, the glass transition temperature and the soft segment crystal melting temperature increase, and the crystallinity of soft segment decreases. In the tensile mechanical properties, the Spandex treated with chlorine solution with low pH values exhibits smaller breaking strength and elongation at break.
关键词(KeyWords)：
氨纶;氯水老化;氢键;微相分离;结晶度;拉伸性能
Spandex;chlorination aging;hydrogen bond;microphase separation;crystallinity;tensile property
基金项目(Foundation):
作者(Author):
游革新,祁灏,肖泽润
YOU Ge-xin,QI Hao,XIAO Ze-run
DOI: 10.16090/j.cnki.hcxw.2020.06.002
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