Structure development during thermal-induced gel spinning of polyacrylonitrile/dimethyl sulfoxide/water
The thermal-induced gel spinning of polyacrylonitrile/dimethyl sulfoxide solutions with different amounts of water as nonsolvent were performed. The fibers were then stretched. The structure and performance of the PAN precursor fibers were characterized by mechanical properties testing, swelling capacity testing, X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The effects of the water content, polymer concentration, coagulation bath temperature, and draw ratio on the cross-sectional morphology, structure, and tensile properties were reported. The SEM results showed that 2% water content is optimal due to dispersed small pores could be found in the fibers’ cross sections. With the coagulating bath temperature decreased, the big pores in fibers decreased and almost disappeared at -9 ℃. The swelling capacity results were consistent with those obtained by SEM. The mechanical properties of the PAN fibers increased with the enhancement of PAN concentration. It was also found that the decrease of the coagulating bath temperature or water content would induce the improvement of the fibers’ mechanical properties.
DU Weiping YE Wu CHEN Huifang PAN Ding
State Key Laboratory for Chemical Fibers Modification and Polymer Materials,Donghua University, Shan State Key Laboratory for Chemical Fibers Modification and Polymer Materials, Donghua University, Sha
国际会议
2009 International Conference on Advanced Fibers and Polymer Materials(2009年先进纤维与聚合物材料国际学术会议)
上海
英文
315-317
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）