Thermoplastic copolyester composition with thermally reversible chemical crosslinking properties and preparation method and application thereof

A thermoplastic copolyester and chemical crosslinking technology, which is applied to thermoplastic copolyester compositions with thermally reversible chemical crosslinking properties and their preparation and application fields, can solve the problem of affecting the secondary processing and utilization of polymer recycling and restricting applications. It can achieve the effect of excellent thermo-mechanical properties, favorable material properties, and commercialization.
CN105153409AActive Publication Date: 2015-12-16ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2015-12-16

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Abstract

The invention discloses a thermoplastic copolyester composition with thermally reversible chemical crosslinking properties and a preparation method and application thereof. The copolyester contains a side functional group, namely 2-furfuryl sulfenyl, and is prepared from dibasic acid or dibasic acid ester containing 2-furfuryl sulfenyl, dibasic acid and dibasic alcohol by a melting copolycondensation method. The 2-furfuryl sulfenyl of the copolyester and a crosslinking agent containing maleimide can carry out Diels-Alder cycloaddition reaction at 50-70 DEG C to realize chemical crosslinking and can realize decrosslinking at high temperature, thereby being convenient for recovery and secondary processing and utilization of the materials and realizing a self-repairing or shape memory function of the materials. The thermally reversible crosslinking copolyester designed in the invention has a saturated main chain structure, has excellent thermal stability and mechanical properties, is not easy to generate an irreversible crosslinking structure in thermal processing and life-time service processes of the materials, and can realize thermoplastic processing many times and keep the mechanical properties unchanged.
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Description

technical field

[0001] The present invention relates to a thermoplastic copolyester composition with thermally reversible chemical crosslinking properties and its preparation method and application, especially relates to utilizing the thermally reversible properties of Diels-Alder cycloaddition reaction to realize 2-furfurylsulfanyl side groups Thermally reversible crosslinking between the copolyester and the crosslinking agent containing maleimide groups to prepare a thermally reversible chemically crosslinked thermoplastic with good mechanical properties, recyclable reprocessing and self-healing Copolyester compositions. Background technique

[0002] For polymers, chemical crosslinking structure and thermoplasticity are often a pair of contradictions, and it is difficult to coexist. Chemically crosslinked thermosetting polymers, the most common such as vulcanized rubber, have excellent mechanical properties and heat resistance, but the existence of chemically crosslinked ...

Claims

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