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Synthesis of Terpolymers at Mild Temperatures Using Dynamic Sulfur Bonds in PolyS-Divinylbenzene

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Published on: May 20, 2019

Poly(oxime-ester) Vitrimers with Catalyst-Free Bond Exchange.

Changfei He¹, Shaowei Shi¹, Dong Wang¹

¹Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology , Beijing 100029 , China.

Journal of the American Chemical Society

|August 22, 2019

Summary

New poly(oxime-ester) vitrimers enable catalyst-free reactions and recycling. These sustainable plastics offer high stretchability and malleability without compromising mechanical properties after reuse.

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Published on: May 20, 2019

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Predicting Catalyst Extrudate Breakage Based on the Modulus of Rupture

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Published on: May 13, 2018

Area of Science:

Polymer Chemistry
Materials Science

Background:

Vitrimers are network polymers with temperature-dependent associative bond exchange.
Catalysts are often needed to lower the exchange threshold in conventional vitrimers, but can lead to leaching and deactivation.
This limits the reusability and sustainability of existing vitrimer materials.

Purpose of the Study:

To develop catalyst-free vitrimers by modifying the polymer backbone.
To synthesize and characterize novel poly(oxime-ester) (POE) vitrimers.
To evaluate the recyclability and mechanical properties of the new POE vitrimers.

Main Methods:

Synthesis of POE vitrimers utilizing thiol-ene click chemistry.
Characterization of polymer network structure and properties.
Mechanical testing to assess stretchability, malleability, and recyclability.

Main Results:

Successfully synthesized POE vitrimers that exhibit catalyst-free bond exchange reactions.
Achieved high stretchability and malleability in the synthesized POE vitrimers.
Demonstrated efficient recycling with minimal degradation of mechanical properties.

Conclusions:

Oxime-ester linkages enable catalyst-free vitrimer behavior, overcoming limitations of traditional polyesters.
POE vitrimers offer a sustainable alternative for plastics with excellent recyclability and preserved mechanical integrity.
This work opens avenues for designing advanced, reusable polymer networks.