Polyethylene-like degradable copolyester as well as preparation method and application thereof

Through the oxalic acid short-chain oligopolymer-assisted polycondensation method, the problem of difficult growth of the molecular weight of polyethylene-like polyester during the polycondensation process is solved, and the high molecular weight growth and controllable degradation effect of polyethylene-like degradable copolyester is achieved, effectively controlling plastic pollution.

CN119661818AActive Publication Date: 2025-03-21NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI
4 Cites 0 Cited by

Patent Information

Application Number
CN202411836661.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-12
Publication Date
2025-03-21
Estimated Expiration
2044-12-12

AI Technical Summary

Technical Problem

The existing polyethylene-like polyester is difficult to achieve high molecular weight during the polycondensation process, and the oxalic acid structure has poor thermal stability at high temperatures, making it difficult to react with long-chain dibasic acid or its esterides to form high molecular weight PE-like polyester.

Method used

By using the method of assisted polycondensation of oxalic acid short-chain oligomers, polyethylene-like degradable copolyesters with a main chain containing long-chain methylene structure and oxalate bonds were prepared.

Benefits of technology

The high molecular weight growth of polyethylene-like degradable copolyester has been achieved, its mechanical properties and crystallization capabilities have been optimized, and the controllable degradation effect has been achieved by regulating the length of methylene and the number of oxalic acid unit structures has been achieved, effectively controlling plastic pollution.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses polyethylene-like degradable copolyester as well as a preparation method and application thereof. The structural formula of the polyethylene-like degradable copolyester is as follows: # imgabs0 #-R1-is a structural unit of long-chain binary acid or ester thereof,-O-R2-O-is a structural unit of long-chain dihydric alcohol, m is equal to 1-10, n is equal to 1-10, and x is equal to 10-100; and the molar ratio of-R1 <-> to # imgabs 1 # is (3: 2)-(19: 1). The problem that long-chain dihydric alcohol is not easy to remove during polycondensation is solved by adopting an oxalic acid short-chain oligomer-assisted polycondensation method, the oxalic acid content is accurately regulated and controlled, and the main chain of the prepared polyethylene-like degradable copolyester contains a long-chain methylene structure and an oxalate bond, so that the polyethylene-like degradable copolyester has excellent mechanical properties and crystallization capacity, and can be used for preparing polyethylene-like degradable copolyester. The controllable degradation of the controllable polyethylene-like polyester can be realized by regulating and controlling the length of methylene and the number of oxalic acid structures, and the controllable polyethylene-like polyester can be widely applied to plastic products to meet the requirements of different application scenes on the stability and degradation rate of degradable materials.
Need to check novelty before this filing date? Find Prior Art