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Synthesis of regioselective starch‐based macroinitiators at molecular level
Author(s) -
Wang Leli,
Qu Lin,
Wu Ying,
Men Yongjun,
Liu Zhengping
Publication year - 2017
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.201700043
Subject(s) - starch , regioselectivity , hydrogen bond , polymer chemistry , chemistry , solubility , materials science , molecule , organic chemistry , catalysis
Regioselective starch‐based macroinitiators, such as 2,3,6‐O‐macroinitiator (2,3,6‐O‐starch‐2‐bromoisobutyrate), 2‐O‐macroinitiator (2‐O‐starch chloroacetate), 6‐O‐macroinitiator (6‐O‐starch‐3‐chloropivalate), 3‐O‐macroinitiator (3‐O‐starch‐2‐bromoisobutyrate), 3,6‐O‐macroinitiator (3,6‐O‐starch‐2‐bromoisobutyrate), and 2,3‐O‐macroinitiator (2,3‐O‐starch‐2‐bromoisobutyrate), were successfully synthesized at the molecular level. 13 C NMR spectra were employed to certify the structures of these regioselective macroinitiators. Their thermal behaviors characterized by TGA and DSC indicated the destruction of hydrogen bonds and the crystalline structure during the dissolution and reaction processes. The solubility of macroinitiators depended on their degree of substitution (DS).