An analysis of the moisture‐related properties of hydrolyzed polyester
An analysis of the moisture‐related properties of hydrolyzed polyester
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DOI：
10.1002/app.1982.070271135
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发表时间：
1982-11
影响因子：
3
通讯作者：
E. Sanders;S. Zeronian
中科院分区：
文献类型：
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作者：
E. Sanders;S. Zeronian
碱性水解会导致聚酯（PET）纤维和薄膜表面的点蚀，并改善其润湿性，如接触角测量所示。增强的润湿性是由于增加的数量或聚合物亲水基团的水和/或样品表面的粗糙度的增加的可访问性。在PET纱线和织物结构中的空隙空间的增加，由在NaOH水溶液中的处理引起的与增加的纤维的润湿性一起，在改善材料的水分传输性能方面是有效的。经NaOH处理的PET织物比孤立的相应纱线更进一步地输送水，这可能是因为在织物中，纱线之间的空间充当允许进一步芯吸发生的附加储库。从浸泡和平衡芯吸能力测试中可以明显看出，亲水性局部整理剂以及纱线/织物结构和其表面亲水性的变化可以增加PET织物的持水能力。测定了样品的回潮率和保水性值，发现这种试验不足以区分未处理的PET织物的亲水性和通过应用局部整理剂或通过NaOH处理改性的PET织物的亲水性。
Alkaline hydrolysis causes pitting of the surface of polyester (PET) fibers and films and improves their wettability, as indicated by contact angle measurements. The enhanced wettability is due to an increase in either the number or the accessibility of polymer hydrophilic groups to water and/or an increase in the roughness of sample surfaces. The increase of void space in the PET yarn and fabric structure, induced by treatment in aqueous NaOH together with the increased wettability of the fibers, was effective in improving the moisture transport properties of the materials. The NaOH-treated PET fabrics transported the water further than isolated corresponding yarns, possibly because, in the fabrics, the spaces between the yarns acted as an additional reservoir that permitted further wicking to occur. It is apparent from immersion and equilibrium wicking capacity tests that a hydrophilic topical finish, as well as a change in the yarn/fabric structure and the hydrophilicity of their surfaces can increase the water holding capacity of PET fabric. The moisture regain and water retention values of the samples were determined, and it was found that such tests are not sufficiently sensitive to distinguish between the hydrophilicity of nontreated PET fabrics and that of PET fabrics modified either by application of a topical finish or by NaOH treatment.