C-13 NMR STRUCTURAL STUDY CELLULOSE ETHERS BY MEANS OF THEIR ACETYLATED DERIVATIVES .5. NMR STRUCTURAL STUDY ON METHYLHYDROXYPROPYLCELLULOSE OBTAINED BY DIFFERENT PROCEDURES

被引：15
|
作者：
TEZUKA, Y [1 ]
IMAI, K [1 ]
OSHIMA, M [1 ]
CHIBA, T [1 ]
机构：
[1] SHIN ETSU CHEM CO LTD,SPECIALTY CHEM RES CTR,NIIGATA 942,JAPAN
来源：
POLYMER JOURNAL | 1991年 / 23卷 / 03期
关键词：
METHYLHYDROXYPROPYLCELLULOSE; C-13; NMR; SUBSTITUENT DISTRIBUTION; CELLULOSE DERIVATIVES;
D O I：
10.1295/polymj.23.189
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A series of methylhydroxypropylcellulose (MHPC) samples were prepared by different procedures and the distribution of methyl and hydroxypropyl substituents was determined by means of a C-13 NMR analysis after the acetylation of both the unsubstituted hydroxyl groups on the anhydroglucose unit and these at the end of hydroxypropyl substituents. The methoxy methyl and the acetyl carbonyl signal analysis of acetylated MHPC samples allowed one to provide the detailed distribution pattern of two substituents and to correlate with the preparation procedure of the starting MHPC samples.
引用
收藏
页码：189 / 193
页数：5
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