首页 | 本学科首页   官方微博 | 高级检索  
     检索      

POLYMERIZATION OF p-DIETHYNYLBENZENE INITIATED BY Ni(C≡CC_6H_4C≡CH)_2(PPH_3)_2
作者姓名:Mu-jie Yang  Xiao-wei Zhan
作者单位:Mu-jie Yang;Xiao-wei Zhan Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027,China Present address: Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080,China
基金项目:The project was supported by the National Natural Science Foundation of China (No. 29574177).
摘    要:Homogeneous polymerization of p-diethynylbenzene initiated by nickel acetylide Ni(C ≡ C C_6H_4 C ≡ CH)_2(PPh_3)_2has been investigated in terms of different solvents, addition agents, atmosphere gases, catalyst concentrations, monomerconcentrations and polymerization temperatures. The yield and catalytic efficiency approach 88% and 11. 1 kg polymer/molNi, respectively, under the optimum conditions: cat] = 0.01 mol/L, M] = 1.0 mol/L, NEt_3/cat (mol ratio) = 3~5, 1,4-dioxane/toluene (volume ratio) = 1 and T = 25℃ for 5 h. The polymerization rate equation can be expressed as R_p =k_pM]cat]~2, where k_p= 0.47 L~2. mol~(-2)·S~(-1) (25℃). The overall polymerization activation energy was found to be203 kJ·mol~(-1). Poly(p-diethynylbenzene) so obtained is soluble in THF, CHCl_3 and toluene with weight-average molecularweights as high as 27, 100 and a rich-trans extended π-conjugated polyene chain structure with pendent groups ofp-C_6H_4C≡CH.

本文献已被 CNKI 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号