scholarly journals Infrared spectroscopy of aqueous poly(ethylene glycol)-b-poly(n-isopropylacrylamide) through the lower critical solution temperature window

2019 ◽  
Author(s):  
Ryan N. Cruse
Keyword(s):  
Infrared Spectroscopy ◽  
Ethylene Glycol ◽  
Lower Critical Solution Temperature ◽  
Solution Temperature ◽  
Poly Ethylene Glycol ◽  
Critical Solution Temperature ◽  
Temperature Window ◽  
Poly Ethylene

Synthesis and Property of Photo- and Temperature- Dual-Responsive Amphiphilic Block Copolymers

2009 ◽  
Vol 87-88 ◽  
pp. 47-51
Author(s):  
Xin De Tang ◽  
Nian Feng Han ◽  
De Jie Zhou
Keyword(s):  
Block Copolymers ◽  
Ethylene Glycol ◽  
Drug Carrier ◽  
Amphiphilic Block Copolymers ◽  
Solution Temperature ◽  
Poly Ethylene Glycol ◽  
Critical Solution Temperature ◽  
Dual Responsive ◽  
Hexyl Methacrylate ◽  
Poly Ethylene

Photo- and temperature-responsive amphiphilic block copolymers, poly(ethylene glycol)-b-poly{(N-isopropylacrylamide-co-6-[4-(4-methoxyphenylazo)phenoxy]hexyl methacrylate), denoed as PEO-b-P(NIPAM-co-MAZO), were designed and synthesized by atom transfer radical polymerization (ATRP). The macroinitiator based on poly(ethylene glycol) (PEG, Mn = 2000 Da) was utilized to initiate the copolymerization of N-isopropylacrylamide (NIPAM) and 6-[4-(4-methoxyphenylazo)phenoxy]hexyl methacrylate (MAZO). The resultant copolymers, combining photo-responsive moieties with thermal-responsive moieties, possess photo- and temperature- dual-responsive property, among of which, PNIPAM shows lower critical solution temperature (LCST) and PMAZO exhibits reversible trans-cis isomerization under UV/vis irradiation. In selective solution they can form selective micro-tunnel with excellent controlled release, and can be used as drug carrier and controllable membrane.

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