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Polylactic acid flexibilizer and preparation method thereof and modified polylactic acid and preparation method thereof

A technology of polylactic acid and toughening agent, which is applied in the field of polymer composite materials, can solve the problems of increased use of toughening agent and poor compatibility of soft monomers, and achieves reduction of added amount, good toughening effect and compatibility. improved effect

Active Publication Date: 2012-09-19
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, polylactic acid tougheners generally use soft monomers, but the compatibility between soft monomers and polylactic acid is poor, and if some hard monomers with good compatibility with polylactic acid are added to the toughener, it will Greatly increase the usage of toughening agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The present embodiment provides a kind of preparation method of polylactic acid toughening agent, comprises the following steps:

[0048] (1), 1.2g of sodium oleate and 2g of sodium bicarbonate were dissolved in 210g of water and stirred, dispersed evenly to obtain a solution, and 45g of methyl acrylate and 1.5g of methyl methacrylate were added to the solution and fully stirred obtain the first mixture;

[0049] (2), add the first initiator to the first mixture in step (1), continue to stir, and control the reaction temperature to be 85°C, react for 1 hour and cool down to 82°C, remove the condensate generated in the reaction, and obtain The second mixture, the first initiator is 20g of water dissolved 0.3g of K 2 S 2 o 8 The resulting solution;

[0050] (3), in the second mixture in step (2), add the sodium oleate of 0.2g, then slowly add the 3rd mixture, described 3rd mixture is made of the methyl acrylate of 90g, the acetone of 12g, the oil of 0.9g Sodium acid,...

Embodiment 2

[0056] The present embodiment provides a kind of preparation method of polylactic acid toughening agent, comprises the following steps:

[0057] (1), the sodium oleate of 1g and the sodium bicarbonate of 1.25g are dissolved in the water of 90g and stir, disperse uniformly to obtain the solution, add the methyl acrylate of 60g and the methyl methacrylate of 4g in this solution and fully stir to obtain the first mixture;

[0058] (2), add the first initiator to the first mixture in step (1), continue to stir, and control the reaction temperature to be 95°C, cool down to 85°C after 2 hours of reaction, remove the condensate generated in the reaction, and obtain The second mixture, the first initiator is 20g of water dissolving 0.15g of (NH 4 ) 2 S 2 o 8 The resulting solution;

[0059] (3), in the second mixture in step (2), add the sodium oleate of 0.1g, then slowly add the 3rd mixture, described 3rd mixture is made of the methyl acrylate of 80g, the acetone of 5g, the oil ...

Embodiment 3

[0062] The present embodiment provides a kind of preparation method of polylactic acid toughening agent, comprises the following steps:

[0063] (1), the sodium oleate of 1.5g and the sodium bicarbonate of 1g are dissolved in the water of 180g and stir, disperse evenly to obtain the solution, add the methyl acrylate of 50g and the methyl methacrylate of 2g in this solution and fully stir to obtain the first mixture;

[0064] (2), add the first initiator to the first mixture in step (1), continue to stir, and control the reaction temperature to be 93°C, cool down to 78°C after 1.5 hours of reaction, remove the condensate generated in the reaction, and obtain The second mixture, the first initiator is 20g of water dissolving 0.25g of (NH 4 ) 2 S 2 o 8 The resulting solution;

[0065] (3), in the second mixture in step (2), add the sodium oleate of 0.05g, then slowly add the 3rd mixture, described 3rd mixture is made of the methyl acrylate of 82g, the acetone of 7g, the oil ...

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Abstract

The invention provides a polylactic acid flexibilizer and a preparation method thereof and a modified polylactic acid and a preparation method thereof. The preparation method of the polylactic acid flexibilizer includes the steps: firstly, adding methyl acrylate and methyl methacrylate into a first emulsifier to obtain a first mixture; secondly, adding a first initiator into the first mixture for initiation reaction, and removing aggregate generated in the reaction to obtain a second mixture; thirdly, adding a second emulsifier into the second mixture and adding a third mixture to continue reacting to obtain emulsion, wherein the third mixture is composed of methyl acrylate, dispersing agent, the second emulsifier, a second initiator and water; and fourthly, diluting the emulsion, adding demulsifying agent, heating for coagulation, and drying precipitates to obtain the polylactic acid flexibilizer. The preparation method is simple, the obtained polylactic acid flexibilizer is well compatible to polylactic acid, additives used by modified polylactic acid prepared from the polylactic acid flexibilizer are reduced, and utilization rate of polylactic acid is increased.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a polylactic acid toughening agent and a preparation method thereof, a modified polylactic acid and a preparation method thereof. Background technique [0002] With the depletion of petrochemical resources (such as petroleum and coal) and the increasing white pollution caused by the extensive use of petroleum-based products, degradable and renewable polyester materials have gradually become the focus of attention. [0003] As an aliphatic polyester, polylactic acid is a renewable biomass resource. It not only gets rid of the dependence on petroleum resources, but also has no pollution in the production process and can be biodegraded. Therefore, it is an ideal green polymer material. In recent years, the application of polylactic acid in the fields of automotive interior, textile, packaging and medicine has made great progress. Due to its non-toxicity, good ...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F2/24C08F6/22C08L67/04C08L33/08B29C47/92B29C48/92
CPCB29C48/04B29C48/40
Inventor 张正光陈效华唐少俊
Owner CHERY AUTOMOBILE CO LTD
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