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| 论文编号: |
122214O120130039 |
| 第一作者所在部门: |
708组 |
| 中文论文题目: |
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| 英文论文题目: |
Pore structure development of polyacrylonitrile nascent fibers in water stretching process
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| 论文题目英文: |
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| 作者: |
郝俊杰
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| 论文出处: |
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| 刊物名称: |
Thermochimica Acta
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| 年: |
2013
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| 卷: |
569 |
| 期: |
0 |
| 页: |
42-47 |
| 联系作者: |
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| 收录类别: |
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| 影响因子: |
1.989
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| 摘要: |
tThe effects of stretching temperature and ratio on the pore structure of wet-spun polyacrylonitrile nascentfibers was investigated by thermoporometry (TPM), a calorimetric technique based on lowering liquidtriple point temperature inside the pores. The patterns of molecular chain movement were characterizedby the tensile recovery. The fibers’ glass-transition temperature determined by the variation of elongationat break at different temperatures was about 75？C. The pore size distribution (PSD) and pore volumewhich was determined by the TPM decreased with the stretching temperature and ratio increasing.The reason for the variation of pore structure was the pore collapse, which was characterized by themovement of molecular chains. The stretching temperature and ratio were the two key parameters toinduce the molecular chains or microfibrils to move easily. This study also shows that TPM can be usedto analyze closed pores of wet-spun nascent fibers inaccessible by other standard porosimetry methods. |
| 英文摘要: |
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| 外单位作者单位: |
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| 备注: |
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