| 热处理对 PPTA 纤维的序态及机械性能的影响 |
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| 引用本文： | 吴宗铨,黄彬,张安秋,钱宝钧.热处理对 PPTA 纤维的序态及机械性能的影响[J].东华大学学报(自然科学版),1987(5). |
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| 作者姓名： | 吴宗铨 黄彬 张安秋 钱宝钧 |
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| 作者单位： | 中国纺织大学化学纤维研究所，中国纺织大学化学纤维研究所，中国纺织大学化学纤维研究所，中国纺织大学化学纤维研究所 |
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| 摘 要： | PPTA 纤维通过张力热处理,纤维的模量得到了显著的提高,纤维的分子结构及超分子结构同时发生了变化。本文测定了热处理前后的 PPTA 纤维晶胞 c 轴的变化,证实 PPTA 纤维在热处理过程中,在超分子结构变化的同时,晶胞也发生了形变。在松弛热处理过程中,纤维的晶胞 c 轴随热处理温度的升高而缩短;而在张力热处理时,晶格 c轴随张力的增犬而伸长。同时,热处理前后纤维热收缩应力的变化与 c 轴变化相对应,纤维的热收缩应力也随着张力的增加而增大,随温度的上升而降低。从热收缩应力和晶胞 c 轴的形变可以计算得到晶格热收缩模量的变化。
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| 关 键 词： | PPTA 纤维 热处理 序态 热收缩应力 晶胞 c 轴 |
THE EFFECT OF HEAT TREATMENT ON THE TEXTURE AND MECHANICAL PROPERTIES OF PPTA FIBER |
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| Wu Zongquan,Huang Bing,Zhang Anqiu Qian Baojun.THE EFFECT OF HEAT TREATMENT ON THE TEXTURE AND MECHANICAL PROPERTIES OF PPTA FIBER[J].Journal of Donghua University,1987(5). |
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| Authors: | Wu Zongquan Huang Bing Zhang Anqiu Qian Baojun |
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| Institution: | Chemical Fiber Research Center |
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| Abstract: | The tensile modulus of PPTA fiber increases upon tensioned heat-set,themolecular structure and super-molecular structure of PPTA fiber are changedsimultaneously.During the relaxed heat-set,c-axis of unit cell of PPTA fiber decreases withthe increase of the heat-set temperature.However,after the tensioned heattreatment,c-axis of the unit cell was extended corresponding to the tension.Mean-while,the changes of thermal shrinking stress were proportional to the variation ofc-axis of unit cell before and after the heat treatment.From the thermal shrink-ing stress and the strain of c-axis of unit cell,we can calculate the thermalshrinking modulus of crystalline region.The thermal shrinking modulus alsoin c teased with tension and decreased with the raise of temperature. |
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| Keywords: | PPTA fiber heat treatment texture the thermal shrinking stress c-axis of unit cell |
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