摘要
采用双乙炔基封端的硅氮烷单体(双(4-乙炔基苯胺基)二苯基硅烷,M1)与含不同二甲基硅基结构单元[—Si(CH3)2—,—Si(CH3)2—O—Si(CH3)2—和—Si(CH3)2—O—Si(CH3)2—O—Si(CH3)2—]的双溴苯基封端单体进行Sonogashira交叉偶联反应,制备出一系列含炔基有机硅杂化聚合物。通过红外(FTIR)、核磁氢谱(1H-NMR)和凝胶渗透色谱(GPC)对聚合物的结构和分子量进行了表征,并采用热重分析(TGA)对聚合物的热性能进行了研究。结果表明,二甲基硅基结构的引入显著提高聚合物的溶解性,各组聚合物均展现出良好的热稳定性能,其中引入—Si(CH3)2—结构的聚合物具有相对最好的热稳定性。
A series of ethynyl-containing organosilicon hybrid polymers had been synthesized via Sonogashira cross-coupling reactions using ethynyl-ended silazane ( N, N' -bis (4-ethynylphenyl) - 1,1 -diphenylsilylenediamine, M1 ) monomer with different silyene-containing [ -Si ( CH3 ) 2-,-Si ( CH3 ) 2-O-Si ( CH3 ) 2- and --Si ( CH3 ) 2- O-Si(CH3)2-O-Si(CH3 )2-] bromophenyl-ended monomers. These polymers showed good solubility. The poly- mers were characterized by FTIR, 1H NMR and gel permeation chromatogratography (GPC). Their thermal properties are investigated by thermogravimetric analysis(TGA). The results show that these polymers has good thermal stability.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2014年第1期69-71,83,共4页
Aerospace Materials & Technology