Application of Salen manganese complex in tandem catalytic reaction involving unsaturated anhydride-epoxy copolymer

A technology of epoxy copolymers and manganese complexes, which is applied in the field of tandem catalytic chemistry, can solve the problems of lack of competitive advantages and failure to utilize the value of Salen manganese, and achieve simplification of the overall operation process, improvement of utilization value, and expansion of performance and application Effect

Active Publication Date: 2020-08-18
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This makes the Salen manganese catalyst lack of competitive advantages, and also fails to pl...

Method used

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  • Application of Salen manganese complex in tandem catalytic reaction involving unsaturated anhydride-epoxy copolymer
  • Application of Salen manganese complex in tandem catalytic reaction involving unsaturated anhydride-epoxy copolymer
  • Application of Salen manganese complex in tandem catalytic reaction involving unsaturated anhydride-epoxy copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment J1

[0102] Cross-linking and curing example J1: The epoxy modified product is cross-linked and cured to obtain a thermosetting Vitrimer material

[0103] In the absence of catalyst separation, 1.5 grams of the epoxidized modified copolymer EP2 obtained in the above epoxidized modification examples was added to a flask, and 8.5 grams of bisphenol A diglycidyl ether was added. 5.7 grams of dianhydride was completely dissolved in acetone. The acetone was then removed by rotary evaporation at room temperature. The resulting viscous mixture was vacuum-dried at room temperature for 24 hours, then transferred to a polytetrafluoroethylene mold, and cured in a constant temperature oven according to the curing conditions of 100°C / 2h+150°C / 2h+170°C / 2h+190°C / 1h curing in. Use silicone grease as a release agent. After curing, cool to room temperature, and then take out the sample, so as to obtain the desired thermosetting Vitrimer material.

Embodiment Z1

[0104] Reprocessing Recycling Example Z1: Thermoset Vitrimer Material Reprocessed into Recyclable Reusable Material

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Abstract

The invention relates to application of a Salen manganese complex as a tandem catalyst in a tandem catalytic reaction involving an unsaturated anhydride-epoxy copolymer. The tandem catalytic reactioncomprises synthesis and epoxidation modification of the unsaturated anhydride-epoxy copolymer, and subsequent cross-linking curing or arylamine modification of the unsaturated anhydride-epoxy copolymer; the Salen manganese complex is added only in an amount of 5 to 20 wt% relative to unsaturated acid anhydride used in the first step of synthesizing the copolymer by the ring-opening copolymerization of the unsaturated acid anhydride and an epoxide, and the Salen manganese complex is used for a subsequent tandem reaction without being separated throughout the tandem catalytic reaction. Accordingto the method, the Salen manganese complex is added at a time according to a specific addition amount to serve as a tandem catalyst, so that the operation of the tandem reaction is simplified, the utilization value of the catalyst is improved, and meanwhile, the performance of the unsaturated anhydride-epoxy copolymer is improved, and the application of the unsaturated anhydride-epoxy copolymer is expanded.

Description

technical field [0001] The invention relates to the field of tandem catalytic chemistry of polymer synthesis, polymer modification and polymer processing, in particular to the application of a Salen manganese complex as a tandem catalyst in a tandem catalytic reaction involving an unsaturated anhydride-epoxy copolymer. Background technique [0002] Aliphatic polyester is one of the most promising degradable polymer materials and biomedical materials. Among them, aliphatic anhydride / epoxy copolymers have the advantages of rich and diverse sources of monomers, and the properties of polymers can be adjusted through different monomer combinations, etc., and have been widely concerned and studied in recent years. Anhydride / epoxy copolymers are mainly obtained by anhydride / epoxy copolymerization catalyzed by metal complexes such as porphyrin metal complexes and Salen metal complexes. Among them, the metals involved include chromium, manganese, cobalt, aluminum and so on. Among t...

Claims

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Application Information

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IPC IPC(8): C08G65/26
CPCC08G65/2615C08G65/266
Inventor 陈昶乐谭忱
Owner UNIV OF SCI & TECH OF CHINA
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