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Recyclable polymer based on six-membered ring delta-valerolactone and preparation method of recyclable polymer

A polymer, valerolactone technology, applied in the field of polymer materials, can solve the problems of harsh degradation conditions and poor selectivity

Pending Publication Date: 2021-09-10
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the problems of harsh degradation conditions and poor selectivity of traditional δ-valerolactone polymer materials

Method used

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  • Recyclable polymer based on six-membered ring delta-valerolactone and preparation method of recyclable polymer
  • Recyclable polymer based on six-membered ring delta-valerolactone and preparation method of recyclable polymer
  • Recyclable polymer based on six-membered ring delta-valerolactone and preparation method of recyclable polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] At 20°C, add 10 μmol catalyst La(OCH 2 C 6 h 5 ) 3 , 5 mL of toluene, stirred for 5 minutes, added 2 mmol 2,2'-diethyl-δ-valerolactone monomer, stirred for 10 minutes under the condition of nitrogen protection, added 1 mL of methanol acidified with hydrochloric acid to terminate the polymerization reaction, added 100 mL of methanol , filter to obtain polymer, wash with 10mL methanol each time, wash 3 times, dry to constant weight in vacuum oven, obtain 0.30 gram white powder, measure the average molecular weight of polymer by gel chromatography 15300g / mol, molecular weight distribution is 1.19, DSC test showed that the melting point of the polymer was 134°C.

Embodiment 2

[0037] Using the same experimental equipment as in Example 1 and under the same conditions, the temperature was lowered to -10°C. After 30 minutes, 1 ml of methanol acidified with hydrochloric acid was added to terminate the polymerization reaction, 10 ml of methanol was added, and the polymer was obtained by filtration, each time with 10 ml Washed with methanol, washed 3 times, dried in a vacuum oven to constant weight, to obtain 0.30 g of polymer, the average molecular weight of the polymer was determined by gel chromatography to be 18300, and the molecular weight distribution was 1.10. The DSC test showed that the melting point of the polymer was 135°C.

Embodiment 3

[0039] Using the same experimental apparatus as in Example 1, under the same conditions, just add initiator benzyl alcohol 10 μ mol, after 10 minutes, obtain polymer 0.29 gram, measure the average molecular weight 9500 of polymer by gel chromatography, and molecular weight distribution is 1.15.

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Abstract

The invention belongs to the field of high polymer materials, and discloses a recyclable polymer based on six-membered ring delta-valerolactone and a preparation method of the recyclable polymer. According to the recyclable polymer based on six-membered ring delta-valerolactone, delta-valerolactone at least containing two non-hydrogen atom substituent groups is polymerized under the action of a catalyst to form a polyester material, and the polyester material can be degraded into a polymer precursor under thermal degradation or chemical degradation. The polyester material provided by the invention has the advantages of easiness in obtaining, capability of being quantitatively degraded into a polymeric monomer and the like.

Description

technical field [0001] The invention relates to a six-membered cyclopentalactone-based recyclable polymer and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Polymers are a necessity of modern life. Polymer recycling is an important way to solve polymer pollution. In order to achieve the goal of circular plastic economy, people have realized the recycling of polymers through four ways, and achieved certain results: 1) Using renewable resources to prepare polymer monomers, renewable resources as raw materials can effectively reduce the cost of producing polymer raw materials The pollution produced, but cannot solve the pollution problem of the polymer itself; 2) Biodegradable polymers, biodegradable polymers can indeed solve polymer pollution solutions, but the polymers are eventually converted into worthless by-products; 3) polymers Physical Recycling: Mechanical reprocessing of polymers allows the polymer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/08C08G63/84
CPCC08G63/08C08G63/823
Inventor 徐铁齐李欣蕾安海艳
Owner DALIAN UNIV OF TECH