Citation: ZHOU Zinan, TIAN Wenjing, WU Shengrong, DAI Yingkun, FENG Zhiliu, SHEN Lianfang, YUAN Hanzhen. SUBSTITUENT CHEMICAL SHIFT (SCS) AND THE SEQUENCE STRUCTURE OF ETHYLENE-VINYL ALCOHOL COPOLYMERS[J]. Chinese Journal of Polymer Science, ;1992, 10(4): 299-303. shu

SUBSTITUENT CHEMICAL SHIFT (SCS) AND THE SEQUENCE STRUCTURE OF ETHYLENE-VINYL ALCOHOL COPOLYMERS

Received Date: 25 May 1991

Three ethylene-vinyl alcohol copolymers were studied by means of the substituent chemical shift (SCS) method. The SCS parameters of hydroxy (-OH) in two different solvents were obtained: in deuterium oxide/phenol (20/80 W/W ) the parameters are S1 = 42.77±0.08ppm, S2 = 7.15±0.06 ppm, S3 (s)= -4.08±0.02ppm, S3 (t) =-3.09±0.20ppm,S4 = 0.48±0.03ppm, S5 = 0.26±0.05ppm. In o-dichloro-benzen-d4 S1(s)=44.79±0.61ppm, S2=7.40±0.00ppm, S3(s)=-4.51±0.17ppm, S3(t)=-3.13 ±0.00 ppm, S4 =0.63±0.04ppm, S5=0.36±0.00ppm.Simultaneously the 13CNMR spectra of EVA copolymers were assigned by using the SCS parameters obtained.
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