CHENG Fa, ZHAO Hua, FENG Jianxin, ZHANG Jingwu, LI Guifeng. THE STUDY OF DISTRIBUTION OF SUBSTITUENTS OF CARBOXYMETHYL CELLULOSE PRODUCED IN MEDIUM C 6H 6 C 2H 5OH[J]. Acta Polymerica Sinica, 1997,(5):524-529.
CHENG Fa, ZHAO Hua, FENG Jianxin, ZHANG Jingwu, LI Guifeng. THE STUDY OF DISTRIBUTION OF SUBSTITUENTS OF CARBOXYMETHYL CELLULOSE PRODUCED IN MEDIUM C 6H 6 C 2H 5OH[J]. Acta Polymerica Sinica, 1997,(5):524-529.DOI:
Carboxymethyl cellulose (CMC) was produced in the medium containing benzene and 95% ethanol.Through 1H-NMR method
the distribution of carboxymethyl groups at C2
C3 and C6 positions of anhydroglucose unit (AGU) was measured and the effect of benzene was investigated.It showed that the sequence of distribution was C6>C2>C3 and when DS was lower than 1 0 C2∶C3∶C6 was 1 45∶1∶2 15 approximately;when DS was higher than 1.0 the distribution of substitution tends to be indentical.The distribution of substituent of CMC prepared in medium benzeneethanol-water at substituent had been explained by X-ray diffraction.