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Recyclable polyester material with main chain containing active double bonds as well as preparation method and application thereof

A polyester material, a lively technology, applied in the field of recyclable polyester materials, can solve the problems of non-recyclable and difficult to obtain, and achieve the effect of mild reaction conditions

Active Publication Date: 2018-11-16
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the problem that traditional double bond-containing polyester materials are difficult to obtain or cannot be recycled

Method used

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  • Recyclable polyester material with main chain containing active double bonds as well as preparation method and application thereof
  • Recyclable polyester material with main chain containing active double bonds as well as preparation method and application thereof
  • Recyclable polyester material with main chain containing active double bonds as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]

[0029] At 20°C, add 10 μmol of catalyst 1 and 5 mL of toluene to a pre-dried 25 mL round-bottomed flask, then add 20 μmol of benzyl alcohol, stir for 5 minutes, add 1 mmol of α-methylene-β-valerolactone, and place under nitrogen protection Stir for 2 hours under certain conditions, add 1ml of hydrochloric acid acidified methanol to terminate the polymerization reaction, add 100mL of n-hexane, filter to obtain the polymer, wash with 30mL of n-hexane each time, wash 3 times, and dry in a vacuum oven to constant weight , to obtain 0.2 g of white powder, the average molecular weight of the polymer measured by gel chromatography is 8000, the molecular weight distribution is 1.10, 100% of the double bonds in the NMR determination polymer are retained, and the DSC test shows that the melting point of the polymer is 72 ° C.

Embodiment 2

[0031] In the same experimental apparatus used in Example 1, under the same conditions, only the temperature was reduced to -30 ° C for 3 hours to obtain 0.21 grams of polymer, and the average molecular weight of the polymer measured by gel chromatography was 12000, and the molecular weight distribution was 1.11. 100% of the double bonds in the polymer are retained as determined by NMR, and the melting point of the polymer is 73° C. according to the DSC test.

Embodiment 3

[0033] In the same experimental apparatus used in Example 1, under the same conditions, only the amount of benzyl alcohol was changed to 50 μmol, after 2 hours, 0.19 grams of polymer was obtained, and the average molecular weight of the polymer was determined by gel chromatography 6000, and the molecular weight distribution was 1.15 100% of the double bonds in the polymer are retained as determined by NMR, and the melting point of the polymer is 72° C. according to the DSC test.

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Abstract

The invention belongs to the field of high polymer materials, and relates to a recyclable polyester material with a main chain containing active double bonds. According to the polyester material, 2-vinyl-delta-valerolactone is polymerized under the action of a catalyst so as to form the recyclable polyester material, and the polyester material can be degraded into the 2-vinyl-delta-valerolactone under the action of the catalyst. The polyester material has the advantages of being easy to obtain, capable of being quantitatively degraded into polymeric monomers and the like.

Description

technical field [0001] The invention relates to a recyclable polyester material whose main chain contains active double bonds, a preparation method and application, and belongs to the technical field of polymer materials. Background technique [0002] Polymer materials widely exist in our lives, and now they have become indispensable materials for people's production and life. However, common polymers are discarded in nature after use and cannot be degraded and reused, causing "white pollution". After the function is completed, it can be degraded into polymerized monomers for reuse, which can not only avoid white pollution, but also reduce the cost of polymer use. Therefore, the preparation of recyclable polymers is a work of great significance. [0003] A recyclable polymer is one that degrades into polymerizable monomers. At present, the reported recyclable polymers are polyester compounds obtained by ring-opening of lactones. Hoye et al. reported that the polyester comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/08C08G63/87C07D309/32
CPCC07D309/32C08G63/08C08G63/87
Inventor 徐铁齐吕小兵张学敏
Owner DALIAN UNIV OF TECH
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