摘要
以3,3'-二氨基联苯胺和间苯二甲酸为原料,采用溶液聚合法制得聚-2,2'-(间苯基)-5,5'-二苯并咪唑(m PBI)。通过傅里叶变换红外光谱、核磁共振氢谱、热重分析对m PBI的结构、热稳定性进行了研究,并对聚合物的黏度和溶解性进行了测试。此外,采用静电纺丝法制备m PBI纳米纤维,分析了溶液质量分数、电压、接收距离对纤维直径的影响。结果表明:m PBI具有优异的热稳定性,质量损失10%时的温度高达648℃,其在二甲基甲酰胺等极性非质子溶剂中具有良好的溶解性;当纺丝原液质量分数为12%时的可纺性最好,且当电压在30 k V、接收距离为15 cm时制得的纳米纤维直径最细,可达155 nm。
A fully aromatic meta- polybenzimidazole（m PBI） was synthesised from 3,3＇- diaminobezidine（DAB） and isophthalic acid（IPA） through polycondensation. The structure and thermal stability were charac-terized using Fourier transform infrared spectroscopy（FTIR）, hydrogen nuclear magnetic resonance spec-trum（1H NMR） and thermogravimetric analysis（TG）. The viscosity and solubility of the polymer were alsotested. In addition, m PBI nanofibers were fabricated by electrospinning. The effects of solution concentra-tion, DC voltage and receiving distance on average diameter of m PBI fibers were investigated. The resultsshowed that the polymer had excellent thermal stability and the 10 % weight loss temperatures as high as648 ℃. The obtained polymer was soluble in aprotic organic solvents such as N,N-dimethyl formamide. Thespinnability of polymer solution was best when the spinning solution concentration was 12 % and the mini-mum diameter of nanofibers up to 155 nm under the voltage of 30 k V and receiving distance of 15 cm.
出处
《合成纤维》
CAS
2014年第12期20-25,共6页
Synthetic Fiber in China
基金
天津市科技发展计划(批准号13JCDJC32100)资助
