Ionic Compatibilization of Polymers

ACS Polymers Au, Journal Year: 2022, Volume and Issue: 2(5), P. 299 - 312

Published: July 22, 2022

The small specific entropy of mixing high molecular weight polymers implies that most blends dissimilar are immiscible with poor physical properties. Historically, a wide range compatibilization strategies have been pursued, including the addition copolymers or emulsifiers installing complementary reactive groups can promote in situ formation block graft during blending operations. Typically, such exploits reversible irreversible covalent hydrogen bonds to produce desired copolymer, but there other options. Here, we argue ionic and electrostatic correlations represent an underutilized tool for polymer tailoring materials applications ranging from sustainable alloys organic electronics solid electrolytes. theoretical basis is surveyed placed context existing experimental literature emerging classes functional materials. We conclude perspective on how interactions might be exploited plastic waste upcycling.

Language: Английский

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Phase Separation and Gelation in Solutions and Blends of Heteroassociative Polymers

Macromolecules, Journal Year: 2023, Volume and Issue: 56(14), P. 5661 - 5677

Published: July 10, 2023

An equilibrium statistical mechanical theory for the formation of reversible networks in two-component solutions associative polymers is presented to account phase behavior due hydrogen-bonding, metal–ligand, electrostatic, or other pairwise heterotypic interactions. We derive explicit analytical expressions binding statistics, gelation condition, and free energy, which we consider types A B with many associating groups per chain only A–B association between groups. The energy approximated at mean-field level, considering overlapping polymer chains an ideal gas "stickers" capable intermolecular association. It shown that number associations maximized stoichiometric conditions Accordingly, homogeneous are most easily formed near groups, resulting a re-entrant sol–gel–sol transition as overall composition altered. Association network found be accompanied by tendency separation. These results demonstrate reversibly have large parameter space terms molecular design, mixture compositions. Our predictions expected useful rational design interacting mixtures networks.

Language: Английский

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Upcycling of PET from recycled food packaging trays via vitrimers chemistry

Polymer, Journal Year: 2022, Volume and Issue: 266, P. 125618 - 125618

Published: Dec. 16, 2022

Language: Английский

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Vitrimer-like elastomers with rapid stress-relaxation by high-speed carboxy exchange through conjugate substitution reaction

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Oct. 5, 2024

We report vitrimer-like elastomers that exhibit significantly fast stress relaxation using carboxy exchange via the conjugate substitution reaction of α-(acyloxymethyl) acrylate skeletons. This network design is inspired by a small-molecule model shows even at ambient temperature in presence 1,4-diazabicyclo[2.2.2]octane (DABCO). The and acrylic acid copolymers are cross-linked bis[α-(bromomethyl)acrylates] doped with 10 wt% DABCO, exhibiting processability to obtain transparent film hot pressing. high-speed bond network, validated stress-relaxation tests, allows quick molding household iron. In addition, material applied as an adhesion sheet for plastic metal substrates. Because dynamic cross-linking proposed mechanism can be implemented any polymer bearing carboxyl pendants, our approach versatile backbones, which must thus meaningful practical sense.

Language: Английский

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Temperature- and Time-Dependent Evolution of Hydrogel Network Formed by Thermoresponsive Bcacb Pentablock Terpolymers: Effect of Composition

Published: Jan. 1, 2025

Language: Английский

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