Aliphatic polycarbonate having long chain branch and aromatic polyester copolymer thereof

一种芳香族聚酯、聚碳酸酯的技术，应用在具有长支链的脂肪族聚碳酸酯及其芳香族共聚酯领域，能够解决慢增加、最终聚合物分子量限制等问题

Active Publication Date: 2016-06-15
LOTTE CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these reactions are usually slow and limited in increasing the molecular weight of the final polymer

Method used

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  • Aliphatic polycarbonate having long chain branch and aromatic polyester copolymer thereof
  • Aliphatic polycarbonate having long chain branch and aromatic polyester copolymer thereof
  • Aliphatic polycarbonate having long chain branch and aromatic polyester copolymer thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～11

[0045] Embodiment 1~11. have the preparation (condensation reaction of the compound of formula 1a and the compound of 2a~2d and DMC and dimethyl terephthalate) with long-chain branched aliphatic polycarbonate-aromatic polyester copolymer

[0046] Step 1: 1,4-butanediol (Formula 1a, 10.0 g, 110 mmol) and each of the compounds of Formulas 2a~2d were placed in a three-necked flask and NaOH (0.222 mmol, 0.2 mol%) was added thereto. As shown in Table 1, the compounds of formulas 2a-2d are used in an amount of 0.2 mol%-0.7 mol%. After further addition of toluene (10 ml), a mechanical stirrer was attached to one neck of the bottle, a manifold with vacuum and nitrogen lines attached was connected to the other neck of the bottle, and a Dean- A Stark cold trap was attached to the remaining neck of the bottle. After the reaction vial was immersed in a constant temperature bath, moisture in the mixture was removed by azeotropic distillation with reflux with toluene. After 2 hours, the m...

Embodiment 12～20

[0053] Embodiment 12~20. have the preparation (condensation reaction of the compound of formula 1a and the compound of 2a~2d and DMC) of long-chain branched aliphatic polycarbonate

[0054] Step 1: Repeat the process of Examples 1-11 until moisture is removed from the mixture. Thereafter, the addition of dimethyl terephthalate was omitted and instead the amount of DMC was increased to 15.7 g (174 mmol). After the reaction, the three-necked flask was immersed in a 120° C. constant temperature bath, and the reaction was carried out for 1 hour while distilling off formed methanol and a part of DMC under normal pressure. After heating to 190°C, the reaction was continued while removing volatiles under reduced pressure at 570 mmHg for 0.5 hour, 380 mmHg for 1 hour, and 190 mmHg for 2 hours. Thereafter, the reaction was allowed to proceed for an additional 2 hours while removing volatiles under high vacuum (maintained using a vacuum pump) of 0.3 mmHg. The experimental results are ...

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Abstract

Provided is an aliphatic polycarbonate-aromatic polyester copolymer having a long chain molecule, comprising a repeating unit of -OAO- and a repeating unit of Z(O-)a, wherein the repeating unit of -OAO- and the repeating unit of Z(O-)a are linked via carbonyl[-C(O)-] and -C(O)YC(O)- linking groups. Also provided is an aliphatic polycarbonate copolymer having a weight average molecular weight of at least 30,000, comprising a repeating unit of -OAO- and a repeating unit of Z(O-)a, wherein the repeating unit of -OAO- and the repeating unit of Z(O-)a are linked via a carbonyl[-C(O)-] linking group.

Description

technical field [0001] The present disclosure relates to a novel structure of an aliphatic polycarbonate with long chain branches, an aromatic copolyester of the aliphatic polycarbonate, and a method of preparing the polymer. Background technique [0002] Aliphatic polycarbonates are biodegradable, eco-friendly polymers. The most suitable method for large-scale production of aliphatic polycarbonates is related to the condensation of dimethyl carbonate (DMC) and various diols (reaction 1). [0003] (reaction 1) [0004] [0005] DMC has long been prepared from toxic phosgene. DMC is currently produced on a large scale at low cost from carbon monoxide or more environmentally friendly carbon monoxide. There are many literature reports on the condensation reaction of DMC and diols. However, these reactions are generally slow and limited in increasing the molecular weight of the final polymer. In contrast, macroglycol oligomers with a molecular weight of several thousand ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/64C08G64/02
CPCC08G64/02C08G64/305C08G63/64C08G63/83C08G64/0241C08G64/0208C08G64/1608
Inventor 李泍烈李定宰黄恩英田钟烨鱼性赞
Owner LOTTE CHEM CORP
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