Recently, hydrophilic synthetic fiber products have been sought to substitute natural fibers. This paper investigates the structure and properties of spined copolymer of nylon 6, nylon 4,6 and polyethylene oxide (PEO) — polypropylene oxide (PPO) diamine according to contents of PEO-PPO diamine (15–40%). The structure of new polyamide (NPA) were analyzed by X-ray diffraction (XRD), differential scanning calorimeter (DSC), dynamic mechanical analysis (DMA), gradient density column and gas pycnometry. Through XRD and DSC analysis, it was confirmed that the structure of NPA was similar to nylon 6 regardless of the content of PEO-PPO diamine. The DMA results show that the mobility of polymer chain in non-crystalline structure increases. It was considered that PEO-PPO diamine provides flexible segments and hydrophilic moieties to NPA. The analysis of moisture regain and tenacity was revealed that NPA exhibited 7.38% moisture regain and 2.85 g/denier tenacity.

近来，已经寻求亲水性合成纤维产品来代替天然纤维。本文根据PEO-PPO二胺的含量（15-40％）研究了尼龙6，尼龙4,6和聚环氧乙烷（PEO）-聚环氧丙烷（PPO）二胺的纺丝共聚物的结构和性能。通过X射线衍射（XRD），差示扫描量热仪（DSC），动态力学分析（DMA），梯度密度柱和比重瓶比色法分析了新型聚酰胺（NPA）的结构。通过XRD和DSC分析，证实了无论PAO-PPO二胺的含量如何，NPA的结构都类似于尼龙6。DMA结果表明，聚合物链在非晶体结构中的迁移率增加。认为PEO-PPO二胺为NPA提供了柔性链段和亲水性部分。