文章摘要
一类含四甲氧基芴结构可溶性聚酰亚胺的合成及表征
Synthesis and Characterization of Soluble Polyimides Containing tetra-Methoxyphenyl-Fluorene Structure
  
DOI:10.16865/j.cnki.1000-7555.2018.05.007
中文关键词: 聚酰亚胺  甲氧基  芴基  非共平面结构  溶解性
英文关键词: polyimides  methoxy  fluorenyl  non-coplanar structure  solubility
基金项目:江苏省重点研发计划(BE2017645);江苏省自然科学基金资助项目(BK20141173);聚合物分子工程国家重点实验室开放基金(K2017-35);江苏省“青蓝工程”优秀青年骨干教师资助计划
作者单位
曹世杰1, 汪称意1,2, 徐 常1, 卢 杰1, 赵晓燕1,2, 李 坚1, 任 强1 1. 常州大学 材料科学与工程学院, 江苏 常州 213164
2. 复旦大学 聚合物分子工程国家重点实验室, 上海 200433 
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中文摘要:
      通过三步有机反应合成了一种新型含四甲氧基芴结构的芳香型二胺单体——9,9-双(3,5-二甲氧基-4-(4-氨基苯氧基)苯基)芴,由这种单体分别与4种商品化芳香二酐经过高温缩聚反应,制得一系列含芴结构聚酰亚胺(PI 4a~4d)。分别用傅里叶红外光谱、核磁共振波谱、差示扫描量热及热失重分析等对聚合物的结构和性能进行了表征和研究。该类聚酰亚胺在甲基吡咯烷酮(NMP)、二甲基乙酰胺(DMAc)、二甲基甲酰胺(DMF)、二甲基亚砜(DMSO)等高沸点溶剂及CHCl3、CH2Cl2等低沸点溶剂中具有优异的溶解性;所制得的薄膜具有良好的力学性能,其拉伸强度为62.1~75.6 MPa,断裂伸长率在16.0%~20.7%之间,弹性模量为1.8~2.6 GPa。该系列聚酰亚胺的玻璃化转变温度在244~256 ℃之间,空气和氮气中10%热失重温度均在430 ℃以上,表现出优异的热学性能。
英文摘要:
      A new fluorene-based diamine with tera-methoxy groups, 9,9-bis(3,5-dimethoxy-4-(4-amino-phenoxy)phenyl)fluorene(3) was synthesized by three-step reaction. A series of soluble polyimides (PI 4a-4d) were prepared from the diamine monomer with four commercial aromatic dianhydrides via high temperature polycondensation. The structures of the monomer and polymers were confirmed by 1H-NMR and FT-IR, and the properties of these copolymers were also studied by DSC, TGA, etc. It is found these polyimides have good solubility in NMP, DMAc, DMF, DMSO, CHCl3, CH2Cl2, etc.The films prepared from their solution display good mechanical properties, and their tensile strength, elongation at break and elastic modulus are in the range of 62.1~75.6 MPa, 16.0%~20.7%, 1.8~2.6 GPa, respectively. These polyimides also show good thermal properties. Their glass-transition temperature ranges from 244 ℃ to 256 ℃ and the 10% mass loss temperature in air and nitrogen is higher than 430 ℃.
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