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Application of aliphatic polyester/copolyester to water body degradation material

A technology for aliphatic polyesters and degradable materials, applied in the field of degradable polymer materials, can solve problems such as ocean plastic pollution, differences in enzymatic and non-enzymatic hydrolysis performance of aliphatic polyesters and copolyesters, water pollution, etc.

Inactive Publication Date: 2017-07-28
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different degradation environments and degradation conditions lead to significant differences in the enzymatic and non-enzymatic hydrolysis properties of aliphatic polyesters and copolyesters. The research results of polyester biodegradable materials cannot be directly applied to seawater to effectively solve marine plastic pollution. question
Although the current research on the preparation of polyester materials and their degradation properties has been very extensive, most of these studies have been carried out under air and compost conditions. The non-enzymatic degradation properties of aliphatic polyesters in water and their use as a water degradation material There are no reports of applications in packaging, disposable tableware, etc. to alleviate marine pollution
[0006] Therefore, it is necessary to develop materials that can degrade by themselves in seawater to overcome the problem of water pollution caused by traditional refractory or non-degradable plastic products such as PP, PE, and PA.

Method used

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  • Application of aliphatic polyester/copolyester to water body degradation material
  • Application of aliphatic polyester/copolyester to water body degradation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of polyethylene succinate: a total of 360 g of aliphatic ethylene glycol and aliphatic succinic acid in a molar ratio of 1:1 is placed in a reaction device, and the temperature is 150 ° C for normal pressure esterification. When the temperature is 205°C, add 0.36g of p-benzenesulfonic acid, reduce the pressure to 30Pa for polycondensation, and react for 8 hours to obtain polyethylene succinate with a weight average molecular weight Mw of 65,000 and a molecular weight distribution Mw / Mn of 2.0.

[0037] The prepared polyethylene succinate was directly injected into a standard spline in an injection molding machine. Put them into No. 1-6 water bodies in the above Table 1 respectively for degradation performance test. In several kinds of water bodies, the spline firstly showed molecular weight decrease, mechanical property decrease, weight loss and finally disintegrated. The disintegration periods of the spline were: 23W, 26W, 16W, 13W, 28W, 17W.

Embodiment 2

[0039]Commercially available polybutylene succinate (the weight-average molecular weight Mw is 121,000, and the molecular weight distribution Mw / Mn is 1.7) is directly injected into a standard spline in an injection molding machine. Put them into No. 1-6 water bodies in the above Table 1 for degradation performance test. In several kinds of water bodies, the spline firstly showed molecular weight decrease, mechanical property decrease, weight loss and finally disintegrated. The periods of disintegration were: 32W, 30W, 26W, 27W, 32W, 27W.

Embodiment 3

[0041] Commercially available polycaprolactone (weight-average molecular weight Mw is 146,000, molecular weight distribution Mw / Mn is 1.8) is directly injected into a standard spline in an injection molding machine. Put them into No. 1-6 water bodies in the above Table 1 for degradation performance test. In several kinds of water bodies, the spline firstly showed molecular weight decrease, mechanical property decrease, weight loss and finally disintegrated. The periods of disintegration were: 22W, 20W, 19W, 16W, 24W, 18W.

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Abstract

The invention discloses the application of aliphatic polyester / copolyester as a water body degradation material. The aliphatic polyester / copolyester can be hydrolyzed in water, so it can overcome the problem of water pollution caused by traditional plastic products such as PP, PE, PA, etc. etc. have potential applications.

Description

technical field [0001] The invention relates to the field of degradable polymer materials. More specifically, it relates to the application of an aliphatic polyester / copolyester as a water body degradable material. Background technique [0002] In recent years, there have been endless cases about the death of marine life caused by a large number of plastic particles, which has aroused more and more people's attention and thinking about water bodies, especially ocean plastic pollution. The most fundamental and only effective way to solve the current problem of plastic pollution in seawater is to develop seawater-degradable materials that can degrade themselves in seawater to replace PP, PE, PA and other refractory plastic products. [0003] At present, the commercialized aliphatic polyester mainly includes polylactic acid (PLA), polybutylene succinate (PBS) and its copolyester polybutylene terephthalate adipate (PBAT), polycaprolactone esters (PCL) and polyhydroxyalkanoates...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04
CPCC08L67/02C08L67/04
Inventor 王格侠季君晖卢波周玉杨
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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