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Organized calcium based montmorillonite loaded polylactic acid crystal nucleating agent and preparation method thereof

A technology of crystallization nucleating agent and organic calcium, which is applied in the field of biodegradable polymer materials, can solve the problems of low thermal deformation temperature and long crystallization time, and achieve the effects of simple preparation process, low cost and avoiding poor toughness

Inactive Publication Date: 2017-04-19
HUBEI GUANGHE BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of long crystallization time and low heat distortion temperature during the processing of polylactic acid, and improve the molding performance of polylactic acid products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The organic calcium-based montmorillonite and phenylphosphonic acid were placed in 100 o Dry at C for 4 hours, mix the dried organic calcium-based montmorillonite and phenylphosphoric acid at a weight ratio of 5:1 at room temperature, and heat up to 170 o C, the phenyl phosphoric acid is completely melted, and reacted at this temperature for 10 minutes, and then lowered to room temperature to obtain an organic calcium-based montmorillonite-supported polylactic acid crystallization nucleating agent.

[0021] Add 2.5 parts by weight of the prepared organic calcium-based montmorillonite-loaded polylactic acid crystallization nucleating agent and 100 parts by weight of polylactic acid with a weight average molecular weight of 300,000, and add them to the internal mixer, at 180 ° C, 50 The mixture was mixed for 5 minutes under the condition of rpm, and the mixed sample was directly cooled in air at room temperature to obtain a polylactic acid crystal sample.

[0022] The po...

Embodiment 2

[0024] The organic calcium-based montmorillonite and phenylphosphonic acid were placed in 100 o Dry at C for 4 hours, mix the dried organic calcium-based montmorillonite and phenylphosphoric acid at a weight ratio of 10:1 at room temperature, and heat up to 180 o C, the phenyl phosphoric acid is completely melted, and reacted at this temperature for 5 minutes, and then lowered to room temperature to obtain an organic calcium-based montmorillonite-loaded polylactic acid crystallization nucleating agent.

[0025] 5 parts by weight of the prepared organic calcium-based montmorillonite-loaded polylactic acid crystallization nucleating agent and 100 parts by weight of polylactic acid with a weight average molecular weight of 100,000 were added to the internal mixer, at 180 ° C, 50 The mixture was mixed for 6 minutes under the condition of rpm, and the mixed sample was directly cooled in air at room temperature to obtain a polylactic acid crystal sample.

[0026] The polylactic aci...

Embodiment 3

[0028] The organic calcium-based montmorillonite and phenylphosphonic acid were placed in 100 o Dry at C for 4 hours, mix the dried organic calcium-based montmorillonite and phenylphosphoric acid at a weight ratio of 50:1 at room temperature, and heat up to 185 o C, the phenyl phosphoric acid is completely melted, and reacted at this temperature for 1 minute, and then lowered to room temperature to obtain an organic calcium-based montmorillonite-supported polylactic acid crystallization nucleating agent.

[0029] 8 parts by weight of the prepared organic calcium-based montmorillonite-loaded polylactic acid crystallization nucleating agent and 100 parts by weight of polylactic acid with a weight average molecular weight of 400,000 were added to the internal mixer, at 180 ° C, 50 The mixture was mixed for 5 minutes under the condition of rpm, and the mixed sample was directly cooled in air at room temperature to obtain a polylactic acid crystal sample.

[0030] The polylactic a...

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PUM

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Abstract

The invention provides an organized calcium based montmorillonite loaded polylactic acid crystal nucleating agent and a preparation method thereof. The organized calcium based montmorillonite loaded polylactic acid crystal nucleating agent comprises the following raw materials: organized calcium based montmorillonite and phenylphosphonic acid, wherein the weight ratio of the organized calcium based montmorillonite to the phenylphosphonic acid is (5-100): 1. The preparation method comprises the following steps: uniformly mixing the organized calcium based montmorillonite with the phenylphosphonic acid at room temperature, then carrying out heating to 165 to 185 DEG C until the phenylphosphonic acid is completely molten, carrying out stirring at 165 to 185 DEG C for 1 to 10 minutes, and carrying out cooling to room temperature so as to obtain the organized calcium based montmorillonite loaded polylactic acid crystal nucleating agent, wherein a preferred treatment temperature is 170 to 180 DEG C. The organized calcium based montmorillonite loaded polylactic acid crystal nucleating agent provided by the invention has the following advantages: the organized calcium based montmorillonite is used as a carrier, and calcium phenylphosphate generated by a reaction of the phenylphosphonic acid with the organized calcium based montmorillonite is highly dispersed on the surface of the organized calcium based montmorillonite, so formed effective nucleation points are increased, and nucleation efficiency is improved.

Description

technical field [0001] The invention relates to a polylactic acid crystallization nucleating agent, in particular to an organic calcium-based montmorillonite loaded polylactic acid crystallization nucleating agent and a preparation method thereof, belonging to the technical field of biodegradable polymer materials. Background technique [0002] As a bio-based polymer material, polylactic acid (PLA) is renewable, biocompatible, biodegradable, high mechanical strength and modulus, and highly transparent compared with traditional petroleum-based polymers. And machinability, has become a research hotspot in the field of new materials. It is of great significance to apply it to the field of general plastics in reducing environmental pollution and saving oil resources. However, the slow crystallization rate and low crystallinity of polylactic acid lead to low heat distortion temperature, long molding cycle, and low transparency are particularly prominent, which largely limits the...

Claims

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Application Information

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IPC IPC(8): C08K9/12C08K3/34C08K5/5317C08L67/04
CPCC08K9/12C08K3/346C08K5/5317C08K2201/018C08L67/04
Inventor 谢招旺
Owner HUBEI GUANGHE BIO TECH
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