Application of salen manganese complexes in tandem catalytic reactions involving unsaturated anhydride-epoxy copolymers

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, achieve good environmental and economic advantages, improve utilization value, expand performance and Applied effect

Active Publication Date: 2021-08-13
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes the Salen manganese catalyst lack of competitive advantages, and also fails to play the utilization value of Salen manganese as a catalyst capable of catalyzing multiple reactions

Method used

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  • Application of salen manganese complexes in tandem catalytic reactions involving unsaturated anhydride-epoxy copolymers
  • Application of salen manganese complexes in tandem catalytic reactions involving unsaturated anhydride-epoxy copolymers
  • Application of salen manganese complexes in tandem catalytic reactions involving unsaturated anhydride-epoxy copolymers

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 present invention relates to the application of the Salen manganese complex as a tandem catalyst in a tandem catalytic reaction involving an unsaturated anhydride-epoxy copolymer, the tandem catalytic reaction comprising the synthesis and epoxidation modification of an unsaturated anhydride-epoxy copolymer And subsequent cross-linking curing or aryl amination modification, wherein the Salen manganese complex is only used in the first step of synthesizing the copolymer by ring-opening copolymerization of unsaturated anhydrides and epoxides The saturated acid anhydride is added in an amount of 5-20% by weight, and is used for the subsequent series reaction without separation during the whole process of the series catalytic reaction. The present invention simplifies the operation of the series reaction by adding the Salen manganese complex at one time in a specific amount as the series catalyst, improves the utilization value of the catalyst, and simultaneously expands the performance and application of the unsaturated anhydride-epoxy copolymer.

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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Patent Type & Authority Patents(China)
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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