| 拉伸条件对高强PVA纤维结构和性能的影响 |
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| 引用本文： | 王成东,祁玉冬,叶光斗,徐建军. 拉伸条件对高强PVA纤维结构和性能的影响[J]. 合成纤维工业, 2008, 31(1): 22-25 |
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| 作者姓名： | 王成东 祁玉冬 叶光斗 徐建军 |
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| 作者单位： | 四川大学高分子科学与工程学院高分子材料工程国家重点实验室,四川,成都,610065 |
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| 摘 要： | 将聚乙烯醇(PVA)加入到二甲基亚砜(DMSO)和水(质量比94:6)的混合溶剂中,以甲醇为凝固剂,采用干湿法凝胶纺丝,经热拉伸和热定型后,制得高强度PVA纤维。探讨了拉伸工艺对高强PVA纤维结构和性能的影响。结果表明:对于负拉伸为40%,初拉伸2倍,220℃热拉伸9.9倍,热定型2 min的PVA纤维,纤维的结晶结构比较完善,断裂强度为17.8 cN/dtex,初始模量为310.7 cN/dtex;PVA纤维在光学显微镜下观察到的横纹反映出结晶聚集体的光学现象,横纹较多时,纤维的断裂强度和初始模量较高。
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| 关 键 词： | 聚乙烯醇纤维 高强度纤维 干湿法 凝胶纺丝 拉伸工艺 结构 力学性能 |
| 文章编号： | 1001-0041(2008)01-0022-04 |
| 修稿时间： | 2007-07-02 |
Effect of drawing conditions on structure and properties of high-strength PVA fiber |
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| Wang Chengdong,Qi Yudong,Ye Guangdou,Xu Jianjun. Effect of drawing conditions on structure and properties of high-strength PVA fiber[J]. China Synthetic Fiber Industry, 2008, 31(1): 22-25 |
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| Authors: | Wang Chengdong Qi Yudong Ye Guangdou Xu Jianjun |
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| Abstract: | A high-strength poly(vinyl alcohol) (PVA) fiber was prepared from PVA incorporated with the mixture solvent of dimethyl sulphoxide (DMSO) and water at the mass ratio of 94:6 and methanol as a coagulant after heat drawing and setting. The effect of drawing process on the structure and properties of high-strength PVA fiber was discussed.The results showed that the PVA fiber can be produced with the fairly perfect crystal structure,breaking strength 17.8 cN/dtex and initial modulus 310.7 cN/dtex under the conditions of negative stretch 40%,initial drawing ratio 2 times,heat drawing under 9.9 times at 220℃and heat setting for 2 min.The cross striation observed by optical microscopy reflected the optical phenomena of crystalline aggregate. The more cross striation was,the higher the breaking strength and initial modulus of the fiber were. |
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| Keywords: | poly(vinyl alcohol) fiber high-strength fiber dry-wet spinning gel spinning drawing process structure mechanical properties |
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