3种生物基尼龙纤维的制备及结构与性能

Preparation of Three Kinds of Bio-based Nylon Fibers and Their Structure and Properties

分别选取PA510、PA512、PA612生物基树脂作为加工对象,通过熔融纺丝方法制备出相应的生物基尼龙纤维.利用X射线衍射(XRD)、差示扫描量热法(DSC)、热重分析法(TGA),以及力学性能和回潮率测试对纤维的结构与性能进行了系统研究.研究结果表明,3种纤维均为三斜晶系,熔点均高于200℃,热分解温度均超过400℃,纤维断裂强度随牵伸倍数的增大而增加,而初始模量变化不大.此外,纤维的回潮率随碳链长度的增加而降低.

PA510, PA512, PA612 bio-based resins were respectively selected to prepare nylon fibers through melt spinning. Their structures and properties were investigated by X-ray diffraction （XRD）, differential scanning calorimetry （DSC）, thermal gravimetric analysis （TGA）, mechanical test and moisture regain test. Results show that the crystalline structure of these fibers are triclinic. Their melting temperatures are higher than 200℃ and thermal decomposition temperatures exceed 400℃. Breaking strength of the fiber increases with the increasing of the draw ratio, while the initial modulus almost stays constant with the draw ratio. In addition, fiber＇s moisture regain decreases with the increasing of carbon chain length.