摘要
以4,4’-六氟亚异丙基-邻苯二甲酸酐(6FDA),均苯四酸二酐(PMDA),4,4'-二氨基二苯醚(ODA),丙烯酸羟乙酯(HEA)为单体,以N-甲基吡咯烷酮(NMP)为溶剂,氮气保护下合成了光敏聚酰胺酸酯(PAE)。利用FTIR,UV,DSC—TGA等测试手段对其进行了表征。实验结果表明:以PMDA,6FDA与ODA为原料合成高分子量的聚酰胺酸(PAA)的最佳工艺条件为:反应温度控制在室温,二酐与二胺摩尔比为1.05--1.15:1,反应时间为3~3.5h;含氟光敏聚酰胺酸酯(PAE)其紫外可见光谱的最大吸收波长为267nm;在强极性溶剂(NMP、DMF、DMSO)中具有较好的溶解性;PAE酰亚胺化后,转化为PSPI,其耐温达500℃。
Synthesis of poly (amic ester) (PAE) by using 4,4'- (hexafluoroisopro-pylidene)-diphthalic anhydride ( 6FDA ),pyromellitic dianhydride (PMDA), 4,4'-oxydianiline (ODA) and hydroxyl ethyl acrylate (HEA) as monomers,and N-methyl-pyrrollidone (NMP) as solvent, was conducted in nitrogen atmosphere. PAE was characterized by Fourier-transformed infrared spectroscopy (FTIR), ultraviolet (UV), differential scanning calorimetry and thermal gravimetric analysis (DSC-TGA). The experimental results showed that the optimum reaction conditions of polyamide acid (PAA) synethesis in room temperature are as following : n(6FDA+PMDA) : nODA =1.05--1.15, reaction time 3--3. 5 h. The maximal UV absorption wavelength of PAE is 267nm. The PAE has good solubility in super-solvent such as NMP, DMF,DMSO and its heat-resisting temperature reaches 500℃.
出处
《安徽理工大学学报(自然科学版)》
CAS
2008年第4期69-73,共5页
Journal of Anhui University of Science and Technology:Natural Science
基金
安徽省教育厅自然科学研究重点资助项目(2005KJ014ZD)