取代基效应与乙烯-α-烯烃共聚物的序列结构——5.乙烯-乙烯醇共聚物  

Substituent Chemical Shift and Sequence Structure of Ethylene-α-olefine Copolymers 5. Ethylene-vinyl Alcohol Copolymer

作　　者：周子南[1] 田文晶[1] 吴盛容[1] 戴莹琨 冯之榴[1] 沈联芳[2] 袁汉珍[2] 

机构地区：[1]中国科学院长春应用化学研究所高分子物理开放实验室,长春130022 [2]中国科学院武汉物理研究所

出　　处：《分析化学》1992年第3期263-267,共5页Chinese Journal of Analytical Chemistry

摘　　要：本文应用取代基效应(SCS)方法研究了乙烯-乙烯醇(EVA)共聚物,得到了羟基(-OH)在两种不同溶剂中的SCS参数:在苯酚+重水(80/20W/W)中参数为S_1=42.77±0.08ppm,S_2=7.155±0.06ppm,S_3(s)=-4.08±0.02ppm,S_3(t)=-3.09±0.02ppm,S_4=0.48±0.03ppm,S_5=0.26±0.05ppm,在以邻二氯苯为溶剂时参数为S_1=44.97±0.61ppm,S_2=7.40±0.00ppm,S_3(s)=-4.51±0.17ppm,S_3(t)=-3.13±0.00ppm,S_4=0.63±0.04ppm,S_5=0.36±0.00ppm,同时利用所得到的SCS参数对该共聚物的^(13)C NMR谱进行了归属。Three ethylene-vinyl alcohol copolymers were studied by means of the substituent chemical shift (SCS) method. The SCS parameters of hydroxyl (OH) in two different solvents were obtained: the parameters are S_1 =42.775±0.08, S_2 =7.15±0.06, S_3(s) =-4.08±0.02, S_3(t) =-3.09±0.20, S_4 =0.448±0.03, S_5 =0.26±0.05 in deuterium oxide/phenol (20/80, W/W), and S_1 =44.79±0.61, S_2 =7.40±0.00, S_2(s) =-4.51±0.17, S_3(t) =-3.13±0.00, S_4 =0.63±0.04, S_5 =0.36±0.00 in phenol. The ^(13)C NMR spectra of ethylene-vinyl alcohol copolymers were assigned by using the SCS parameters obtained.

关 键 词：序列结构 SCS 乙烯-乙烯醇 NMR 

分 类 号：O632.12[理学—高分子化学]