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Inter‐ and intra‐molecular ionic interactions of polyampholyte: Carboxymethyl‐2‐diethylaminoethylcellulose
Author(s) -
Zheng Guozhen,
Meshitsuka Gyosuke,
Ishizu Atsushi
Publication year - 1994
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1994.210340301
Subject(s) - carboxymethyl cellulose , aqueous solution , viscosity , ionic bonding , intrinsic viscosity , sodium carboxymethylcellulose , sodium , polymer chemistry , chloride , chemistry , cellulose , ionic strength , ionic liquid , proton nmr , materials science , chemical engineering , ion , organic chemistry , polymer , composite material , engineering , catalysis
Carboxymethyl‐2‐diethylaminoethylcellulose (CM‐DEAE cellulose) was prepared by etherification of carboxymethylcellulose with diethylaminoethyl chloride in a NaOH solution. The behaviour of CM‐DEAE cellulose in aqueous solution was studied by viscosity and GPC measurements. The degree of substitution (DS) and existing states of DEAE substituents were examined by the use of proton NMR, and those of the CM substituents were observed with FT‐IR. The results reveal that the reduced viscosity and apparent molecular size of CM‐DEAE cellulose vary with the concentration of sodium chloride and changes in pH and DS. These phenomena can be explained in terms of inter‐ and intra‐molecular ionic interactions.