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Synthesis of Star Poly( N ‐isopropylacrylamide) with a Core of Cucurbit[6]uril via ATRP and Controlled Thermoresponsivity
Author(s) -
Huang Xiaoling,
Zhang Ningqiang,
Ban Linzhe,
Su Haiquan
Publication year - 2015
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201400506
Subject(s) - poly(n isopropylacrylamide) , star (game theory) , polymer science , core (optical fiber) , polymer chemistry , star polymer , materials science , chemistry , physics , copolymer , astrophysics , composite material , polymer
A series of CB[6]‐based macroinitiators with “n” bromo‐initiation sites on the “equator” of CB[6] is developed for the synthesis of CB[6]‐star poly( N ‐isopropylacrylamide) (CB[6]‐star PNIPAM) by atom transfer radical polymerization. By taking advantage of the exceptional binding affinity of the CB[6] core, CB[6]‐star PNIPAM is used as a host macromolecule to construct large compound vesicles in the presence of protonated n‐butylamine at pH 5.63. The deprotonated n‐butylamine is detached from the CB[6] core at pH 11.1, which destructs the vesicular structures. For CB[6]‐star PNIPAM, the thermoresponsive properties can be adjusted by simply changing the formation and destruction of the inclusion complexes of the CB[6] core with n‐butylamine. These results suggest that the prepared CB[6]‐star PNIPAM shows pH and temperature responsiveness, which has great potential for the design of a dual response smart material.