| 聚酰胺酸薄膜热环化过程热分析 |
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| 引用本文： | 程茹,郭立红,王伟,黄培.聚酰胺酸薄膜热环化过程热分析[J].塑料工业,2005,33(12):32-34. |
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| 作者姓名： | 程茹 郭立红 王伟 黄培 |
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| 作者单位： | 南京工业大学化学化工学院,江苏,南京,210009 |
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| 摘 要： | 用差热扫描量热仪(DSC)和傅立叶红外光谱仪(FTIR),考察了梯度升温过程中聚酰胺酸PAA由4,4-二胺基二苯醚(ODA)和3,3,4,4-二苯醚四酸二酐(ODPA)制备]薄膜环化度和玻璃化温度(Tg)随反应温度的变化。结果表明,随着温度的升高,聚合物薄膜的亚胺化程度和Tg不断增大,且各恒温点的薄膜Tg均高于反应温度。另外,由亚胺化程度与Tg的关系曲线可见,在环化程度低时,薄膜Tg增长缓慢;随着亚胺化程度继续增高,薄膜的Tg迅速增大。用热环化过程中分子活动性的变化解释了酰亚胺化反应过程中环化速率的变化。
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| 关 键 词： | 聚酰胺酸薄膜 热环化 分子活动性 玻璃化温度 |
| 文章编号： | 1005-5770(2005)12-0032-03 |
| 收稿时间： | 2005-09-09 |
| 修稿时间： | 2005年9月9日 |
Thermal Analysis of Thermal Cyclization of Polyamic Acid Film |
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| CHENG Ru,GUO Li-hong,WANG Wei,HUANG Pei.Thermal Analysis of Thermal Cyclization of Polyamic Acid Film[J].China Plastics Industry,2005,33(12):32-34. |
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| Authors: | CHENG Ru GUO Li-hong WANG Wei HUANG Pei |
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| Abstract: | The changes of the imidization degree and glass transition temperature (T_g) of polyamic acid (PAA) film derived from ODPA and ODA with the reaction temperature were investigated by means of DSC and FTIR during thermally staged curing.The results indicated the imidization degree and T_g of the polymer film increased with the rise in reaction temperature and the T_g of the polymer film at each isothermal point was higher than the reaction temperature. Moreover,the T_g of the polymer film increased slower in low imidization degree and quicker at higher imidization degree. The change of imidization velocity during thermally staged curing was explained from molecular activity. |
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| Keywords: | Polyamic Acid Film Thermal Cyclization Molecular Activity Glass Transition Temperature |
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