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Effects of denaturing acid on the self-association behaviour of poly(ethylene glycol)-block-poly(γ-benzyll-glutamate)-graft-poly(ethylene glycol) copolymer in ethanol

✍ Scribed by Guo-Quan Zhu; Qiao-Chun Gao; Fa-Gang Wang; Guo-Chang Li; Ping Wang

Book ID
111491461
Publisher
Versita
Year
2011
Tongue
English
Weight
242 KB
Volume
65
Category
Article
ISSN
0366-6352

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✦ Synopsis

Abstract

Poly(ethylene glycol)-block-poly(γ-benzyl l-glutamate)-graft-poly(ethylene glycol) (PEG-b-PBLG-g-PEG) copolymer was synthesised by the ester exchange reaction of PEG-block-PBLG copolymer with mPEG. The self-association behaviour of PEG-b-PBLG-g-PEG in mixtures of ethanol, chloroform, and trifluoroacetic acid as denaturing acid was investigated by transmission electron microscopy, nuclear magnetic resonance spectroscopy, FT-IR spectroscopy, dynamic light scattering, and viscometry. It was revealed that the increase in denaturing acid content in the mixed system not only promoted the critical micelle concentration but also changed the morphology of the polymeric micelles from elliptical to spherical.

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