论文部分内容阅读
通过引入富镧稀土化合物等添加剂,成功实现了细旦尼龙6纤维的熔融纺丝.考察了在纺丝卷绕成型以及牵伸过程中尼龙6纤维的晶型变化.借助XRD和FT-IR等研究手段,发现尼龙6在纺丝过程中可以生成亚稳态的β晶型晶体.这种β晶型经过沸水处理后很容易转化为α晶型,而γ晶型尼龙6经沸水处理后不发生相转变.因此可以通过沸水热处理的方法区分尼龙6的β和γ晶型.在纤维的卷绕过程中,当熔体拉伸倍数较高时,尼龙6可能产生β晶型;当熔体拉伸倍数较低时,则以γ晶型为主.在纤维的牵伸过程中,γ晶型经过β晶型中间态向α晶型相转变.上述结果对于指导改进细旦尼龙6纤维的加工工艺以及提高产品性能有指导意义.
Through the introduction of additives such as lanthanum-rich rare earth compounds, the melt spinning of fine denier nylon 6 fiber was successfully achieved, and the crystal form changes of nylon 6 fiber were investigated during the process of spinning and drawing.The results of XRD and FT-IR Research means, we found that during the spinning of nylon 6 can generate metastable β crystal. This β crystal after boiling water easily transformed into α crystal, and γ crystal 6 nylon after boiling water treatment Phase transformation occurs.Thus, beta and gamma crystal forms of nylon 6 can be distinguished by the method of boiling water heat treatment.Nylon 6 may produce beta crystal form when the draw ratio of the melt is higher during the winding process of the fibers, When the draw ratio is low, the γ crystal is the main one.In the process of fiber drawing, the γ crystal undergoes the β crystal transition to the α crystal transition.The above results are very helpful to improve the fine denier nylon 6 fiber Processing technology and improve product performance guide.