| X射线衍射法研究聚丙烯腈原丝的晶态结构 |
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| 引用本文： | 韩曙鹏,徐樑华,曹维宇,姚红.X射线衍射法研究聚丙烯腈原丝的晶态结构[J].北京化工大学学报(自然科学版),2005,32(2):63-67. |
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| 作者姓名： | 韩曙鹏 徐樑华 曹维宇 姚红 |
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| 作者单位： | 北京化工大学碳纤维及复合材料研究所，北京 100029 |
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| 摘 要： | 用X射线衍射法研究了成纤过程中聚丙烯腈原丝晶态结构的演变规律，给出了各阶段聚丙烯腈的晶态结构模型。结果表明，成纤过程中聚丙烯腈原丝的晶态结构由最初的两相准晶结构经致密化后演变成单相仲晶结构。初生纤维的两相结构中含有“准晶区”（有序区）和非晶区（无序区），“准晶区”中聚丙烯腈大分子以不规则螺旋棒的形式堆砌。致密化过程中非晶区向有序区转变并和原有的有序区相互渗透形成单相“仲晶区”，在这种单相结构中，PAN大分子以一种类Z字形不规则螺旋棒的形式存在，棒与棒之间相互重叠、交叉、缠绕交织，相邻棒间结合紧密。
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| 关 键 词： | 聚丙烯腈原丝 晶态结构 X射线衍射 模型 聚丙烯腈原丝 晶态结构 X射线衍射 模型 |
| 收稿时间： | 2004-09-03 |
| 修稿时间： | 2004年9月3日 |
X-ray diffraction studies on crystalline structure of pan precursors |
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| HAN Shu-peng,XU Liang-hua,CAO Wei-yu,YAO hong.X-ray diffraction studies on crystalline structure of pan precursors[J].Journal of Beijing University of Chemical Technology,2005,32(2):63-67. |
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| Authors: | HAN Shu-peng XU Liang-hua CAO Wei-yu YAO hong |
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| Affiliation: | Institute of Carbon Fiber and Composite, Beijing University of Chemical Technology, Beijing 100029, China |
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| Abstract: | The transformation law of crystalline structure of polyacrylonitrile precursors in the process of fiber formation was studied by means of X-ray diffraction (XRD), and a new model for polyacrylonitrile precursor was presented. The results show that, in the process of fiber formation, the crystalline structure of polyacrylonitrile precursors are transformed from a two-phase semi-crystalline structure, with distinct semi-crystal (ordered) region and amorphous (disordered) region, into a single-phase para-crystalline structure, which is made by interlacing of the new ordered region transformed from amorphous region and initial semi-crystal region. In the single-phase para-crystalline structure, the polymer molecules are assumed to be a contorted helical shape to form rods (like zigzag), and the rods stack tightly via interactional overlapping, intersecting and intertwisting. |
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| Keywords: | polyacrylonitrile precursors crystalline structure X-ray diffraction model |
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