Design and synthesis of unsymmetric phosphinated diamines for high-T_g, transparent polyimides

详细信息	查看全文 | 推荐本文 |

• 作者：Hou Chien Chang^a ; Sheng Lung Chang^a ; Ching Hsuan Lin^a ; ^{linch@nchu.edu.tw} ; Sinn Wen Chen^b ;
• 关键词：Polyimides ; Orientation ; Transparency
• 刊名：Polymer
• 出版年：2012
• 期刊代码：83_00323861
• 类别：ms
• 出版时间：3 April, 2012
• 卷：53
• 期：8
• 页码：1651-1658
• 文件大小：1145 K

摘要

Two phosphinated diamines, 1-(4-aminophenyl)-1-(3-t-butyl-4-aminophenyl) -1- (6-oxido-6H -dibenz <c,e> <1,2> oxaphosphorin-6-yl)ethane (1) and 1-(4-aminophenyl) -1-(3-methxoy-4-aminophenyl)-1-(6-oxido-6H -dibenz <c,e> <1,2> oxaphosphorin-6-yl)ethane (2), were prepared via a facile, one-pot reaction of DOPO, 4-aminoacetophenone and 2-tertbutylaniline or 2-anisidine in the presence of p-toluenesulfonic acid. Based on diamines (1-2), a series of unsymmetric polyimides (3-4) were prepared in NMP/xylene by high-temperature solution polymerization. Transparency polyimides 3-4 with flexibility, organo-solubility, high-T_g values (310-384聽掳C), and moderate thermal properties (T_d 5聽wt%, nitrogen: 461-477聽掳C; air, 456-474聽掳C) can be achieved. We found that the transparency of polyimide films is related with the orientation of the biphenylene phosphinate pendant, and the orientation is influenced by the bulkiness of the ortho-substituted substituent.