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pH-, thermo- and electrolyte-responsive polymer gels derived from a well-defined, RAFT-synthesized, poly(2-vinyl-4,4-dimethylazlactone) homopolymer via one-pot post-polymerization modification

Pei, Y, Sugita, OR, Quek, JY, Roth, PJ and Lowe, AB (2015) pH-, thermo- and electrolyte-responsive polymer gels derived from a well-defined, RAFT-synthesized, poly(2-vinyl-4,4-dimethylazlactone) homopolymer via one-pot post-polymerization modification EUROPEAN POLYMER JOURNAL, 62. pp. 204-213.

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Abstract

Well-defined stimulus-responsive polymer gels were prepared from poly(2-vinyl-4,4-dimethylazlatone) (PVDMA) via one-pot post-polymerization modification. VDMA homo-polymers were reacted with diamine crosslinking agents and functional 1 or 2 amines to form polymer gels that swelled in organic solvents and, in many cases, aqueous solu-tions. A series of functional amine reagents, including N,N-dimethylethylenediamine (DMEDA), N,N-diethylethylenediamine (DEEDA), morpholine, 3-morpholinopropylamine (MPPA) and tetrahydrofurfurylamine (THFA), were chosen as functional amines to produce polymer gels containing environmentally sensitive species. 13C solid-state NMR and FTIR spectroscopic measurements confirmed complete conversion of the reactive scaffolds. pH-dependent swelling behavior at ambient temperature was observed in DMEDA-, DEE-DA- and MPPA-modified hydrogels. Kinetic studies showed the swelling behaviors of DME-DA-modified hydrogels were regulated by cross-linker type and concentration in acidic water (pH = 4) at ambient temperature. The swelling ratio of hydrogels modified by DEE-DA, MPPA and THFA also depended strongly on temperature, indicating successful synthe-sis of thermoresponsive gels. Furthermore, the concentration of added sodium sulfate played a significant role with respect to the swelling properties of MPPA-modified hydro-gels. These smart materials may be of interest in the biomedical field as well as in other applications.

Item Type: Article
Subjects : Chemistry
Authors :
AuthorsEmailORCID
Pei, YUNSPECIFIEDUNSPECIFIED
Sugita, ORUNSPECIFIEDUNSPECIFIED
Quek, JYUNSPECIFIEDUNSPECIFIED
Roth, PJUNSPECIFIEDUNSPECIFIED
Lowe, ABUNSPECIFIEDUNSPECIFIED
Date : 1 January 2015
Identification Number : 10.1016/j.eurpolymj.2014,11.025
Copyright Disclaimer : 2014 Elsevier Ltd. All rights reserved.
Uncontrolled Keywords : Science & Technology, Physical Sciences, Polymer Science, pH-sensitive, Temperature-sensitive, Salt-sensitive, Polymer gels, Post polymerization modification, SCHIZOPHRENIC DIBLOCK COPOLYMER, BLOCK-COPOLYMERS, AQUEOUS-SOLUTION, POSTPOLYMERIZATION MODIFICATION, POLY(ETHYLENE GLYCOL), MICELLE FORMATION, REVERSE MICELLES, HYDROGELS, DELIVERY, KINETICS
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 27 May 2016 10:51
Last Modified : 27 May 2016 10:51
URI: http://epubs.surrey.ac.uk/id/eprint/810467

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