Rigid Polymer Network with Nano pores and its Application for High Performance Materials

纳米孔刚性聚合物网络及其在高性能材料中的应用

• 批准号: 13650748
• 负责人: SHIMAMURA Kaoru
• 金额: $ 2.56万
• 依托单位: OKAYAMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650748/
• 关键词: Rigid Polymer; Network; Nylon 6; Composite; Mechanical Property; Graft Polymer

Rigid polymer networks were prepared by polycondensation of 2, 5-diamino-1, 4-benzene-dithiol with a mixture of terephthalic acid (TPA) and trimesic acid (TMA). The apparent density was dependent on TPA/TMA ratio and much less than that of linear PBZT (1.57 g/cm^3), showing existence of many nano voids within the network. As the segment was so rigid, many COOH's were left around the voids. The network swelled twice in weight with ε-caprolactam, which was polymerized into a composite form of nylon6 impregnated rigid polymer network. Extraction of free nylon6 from the composite with formic acid showed that a quarter of nylon6 grafted directly to rigid polymer network. The grafted nylon6 could not crystallize evidenced by DSC measurements. On the other hand, particles of PBZT network (several hundred nm in diameter) were prepared by stopping the polycondensation just before gelation. A composite film was prepared with the particles swollen with ε-caprolactam. The ratio of PBZT network/nylon6 was 1/3 and the apparent density of the composite film was 1.23 g/cm^3 which is higher than that of a pure nylon6 film (1.16 g/cm^3). Significant improvement in the mechanical property was observed for this composite.

以2，5-二氨基-1，4-苯二硫醇与对苯二甲酸（TPA）和均苯三甲酸（TMA）的混合物进行缩聚反应，制备了刚性聚合物网络。表观密度取决于TPA/TMA比，并且远小于线性PBZT的表观密度（1.57 g/cm ^3），表明网络内存在许多纳米空隙。由于段是如此刚性，许多COOH的周围留下的空隙。该网络用ε-己内酰胺溶胀两倍重量，其聚合成尼龙6浸渍的刚性聚合物网络的复合形式。用甲酸从复合材料中提取游离尼龙6，发现四分之一的尼龙6直接接枝到刚性聚合物网络上。DSC测试表明接枝尼龙6不能结晶。另一方面，通过在凝胶化之前停止缩聚来制备PBZT网络的颗粒（直径几百nm）。用ε-己内酰胺对粒子进行溶胀，制备了复合膜。PBZT网络/尼龙6的比例为1/3，复合膜的表观密度为1.23 g/cm^3，高于纯尼龙6膜的表观密度（1.16 g/cm^3）。观察到该复合材料的机械性能显著改善。