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Direct Polymerization Approach to Synthesize Acid-Degradable Block Copolymers Bearing Imine Pendants for Tunable pH-Sensitivity and Enhanced Release.

Author(s): Hu X, Oh JK

The development of effective approaches to synthesize smart amphiphilic block copolymers (ABPs) exhibiting acid-responsive degradation through the cleavage of acid-labile imine bonds is extensively explored for controlled release of encapsulated biomolecule...

Article GUID: 32964550
Reduction-Responsive Sheddable Carbon Nanotubes Dispersed in Aqueous Solution.

Author(s): An SY, Sun S, Oh JK

Macromol Rapid Commun. 2016 Apr;37(8):705-10 Authors: An SY, Sun S, Oh JK

Article GUID: 26890479
Multiblock Copolymer-Based Dual Dynamic Disulfide and Supramolecular Crosslinked Self-Healing Networks.

Author(s): An SY, Noh SM, Oh JK

Macromol Rapid Commun. 2017 Apr;38(8): Authors: An SY, Noh SM, Oh JK

Article GUID: 28221703
Thermally Labile Self-Healable Branched Gel Networks Fabricated by New Macromolecular Engineering Approach Utilizing Thermoreversibility.

Author(s): Jung S, Patel T, Oh JK

Macromol Rapid Commun. 2018 Mar;39(5): Authors: Jung S, Patel T, Oh JK

Article GUID: 29210490
PLA-Based Triblock Copolymer Micelles Exhibiting Dual Acidic pH/Reduction Responses at Dual Core and Core/Corona Interface Locations.

Author(s): Bawa KK, Jazani AM, Shetty C, Oh JK

Macromol Rapid Commun. 2018 Dec;39(24):e1800477 Authors: Bawa KK, Jazani AM, Shetty C, Oh JK

Article GUID: 30286258
Title:Thermally Labile Self-Healable Branched Gel Networks Fabricated by New Macromolecular Engineering Approach Utilizing Thermoreversibility.
Authors:Jung S,  Patel T,  Oh JK
Link:https://www.ncbi.nlm.nih.gov/pubmed/29210490?dopt=Abstract
Category:Macromol Rapid Commun
PMID:29210490
Dept Affiliation: CHEMBIOCHEM
1 Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec, H4B 1R6, Canada.

Description:

Thermally Labile Self-Healable Branched Gel Networks Fabricated by New Macromolecular Engineering Approach Utilizing Thermoreversibility.

Macromol Rapid Commun. 2018 Mar;39(5):

Authors: Jung S, Patel T, Oh JK

Abstract

A new approach based on macromolecular engineering through thermoreversibility is reported to fabricate the engineered gel networks of thermally labile branched polymers exhibiting robust self-healing. This approach centers on the synthesis of linear polymers having Diels-Alder cycloadducts in the backbones (DALPs) through A2 + B2 step-growth polymerization of a difunctional furan and a difunctional maleimide. Reactive mixtures of the resulting DALP with a polyfuran at elevated temperature allow for the formation of engineered gel networks through random dissociation of backbone DA linkages of the DALPs by retro-Diels-Alder reaction, followed by their reconstruction in the presence of polyfuran (with functionality > 2) by Diels-Alder reaction. Optimizing the ratio of furan to DA linkages in the reactive mixtures yields thermally labile networks exhibiting excellent thermoreversibility. Effective self-healing demonstrated with reconstruction from two separate pieces and complete void filling on surface cuts as well as recovery of healing viscoelasticity suggest that the new macromolecular engineering approach offers versatility toward the development of thermally mendable thermosets.

PMID: 29210490 [PubMed - indexed for MEDLINE]