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Preparation method of aramid polypropylene beta nucleating agent

A beta nucleating agent, polypropylene technology, applied in the field of polymer additive modification, can solve problems such as unsatisfactory refinement effect and limited methods

Active Publication Date: 2020-07-31
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a given nucleating agent, the smaller the size of the nucleating agent, the better the nucleation performance, but the industrial methods to control the size of the nucleating agent are limited and the refinement effect is not ideal

Method used

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  • Preparation method of aramid polypropylene beta nucleating agent
  • Preparation method of aramid polypropylene beta nucleating agent
  • Preparation method of aramid polypropylene beta nucleating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for dissolving an aromatic amide PPβ nucleating agent at room temperature by using concentrated sulfuric acid, and then precipitating through an anti-solvent to regulate the size and shape of the nucleating agent. The specific steps are as follows:

[0041] 1. Dissolving aromatic amide PPβ nucleating agent

[0042] Add 10 g of commercial TMB-5 into 200 ml of concentrated sulfuric acid, stir until the solution is clear and transparent, and obtain a uniform nucleating agent concentrated sulfuric acid solution.

[0043]Two, the nucleating agent in the solution in the anti-solvent precipitation step one

[0044] Slowly add 50ml of the solution prepared in step 1 into 1000ml of deionized water, stir for 10min, filter, and dry the obtained sample in an oven at 70°C for 24h;

[0045] The morphology of the prepared nucleating agent was observed by JSM-5900LV scanning electron microscope (SEM). The morphology observation results of the prepared nucleating agent are as...

Embodiment 2

[0047] A method for dissolving an aromatic amide PPβ nucleating agent at room temperature by using concentrated sulfuric acid, and then precipitating through an anti-solvent to regulate the size and shape of the nucleating agent. The specific steps are as follows:

[0048] 1. Dissolving aromatic amide PPβ nucleating agent

[0049] Add 10g of TMB-5 into 200ml of concentrated sulfuric acid and stir until the solution is clear and transparent to obtain a uniform nucleating agent concentrated sulfuric acid solution.

[0050] Two, the nucleating agent in the solution in the anti-solvent precipitation step one

[0051] Slowly add 50ml of the solution prepared in step 1 into 1000ml of ethanol, stir for 10min, filter, and dry the obtained sample in an oven at 70°C for 24h;

[0052] The morphology of the prepared nucleating agent was observed by JSM-5900LV scanning electron microscope (SEM). The morphology observation results of the prepared nucleating agent are shown in the attached...

Embodiment 3

[0054] A method for dissolving an aromatic amide PPβ nucleating agent at room temperature by using concentrated sulfuric acid, and then precipitating through an anti-solvent to regulate the size and shape of the nucleating agent. The specific steps are as follows:

[0055] 1. Dissolving aromatic amide PPβ nucleating agent

[0056] Add 10g of TMB-5 into 200ml of concentrated sulfuric acid and stir until the solution is clear and transparent to obtain a uniform nucleating agent concentrated sulfuric acid solution.

[0057] Two, the nucleating agent in the solution in the anti-solvent precipitation step one

[0058] Slowly add 50ml of the solution prepared in step 1 into 1000ml of dimethyl sulfoxide, stir for 10 minutes, filter, and dry the obtained sample in an oven at 70°C for 24 hours;

[0059] The morphology of the prepared nucleating agent was observed by JSM-5900LV scanning electron microscope (SEM). The morphology observation results of the prepared nucleating agent are ...

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Abstract

The invention relates to a preparation method of an aramid-based polypropylene beta nucleating agent, belonging to the field of polymer additive modification. The invention provides a method for preparing an aramid-based polypropylene β-nucleating agent. The preparation method is as follows: firstly, the existing aramid-based polypropylene β-nucleating agent is dissolved at room temperature or at 60-200° C. A nucleating agent solution is obtained, the nucleating agent in the nucleating agent solution is precipitated by an anti-solvent to obtain a suspension or an emulsion, and finally the solid obtained by filtering the suspension or emulsion is dried to obtain a modified aramid polypropylene beta nucleating agent. The preparation method of the invention can produce polypropylene beta nucleating agents of various shapes and sizes; and the shape and size of the aramid polypropylene beta nucleating agent can also be regulated by the method.

Description

technical field [0001] The invention relates to a preparation method of an aramid-based polypropylene beta nucleating agent, belonging to the field of polymer additive modification. Background technique [0002] PP materials mainly composed of β crystals (including composite materials based on PP) have higher impact strength and greater ductility than α-type PP materials, and have higher heat distortion temperatures than rubber-modified PP composite materials. and greater rigidity. In summary, β-type polypropylene has a balance of rigidity and toughness in terms of mechanical properties and a high heat distortion temperature, so it is a widely used polypropylene variety. The methods for obtaining β-type polypropylene mainly include quenching method, temperature gradient method, shearing or tensile deformation method, and adding β-nucleating agent method. Among them, the method of adding β-nucleating agent is the most effective and best method to obtain PP with high content...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K9/00C08K5/20
CPCC08K5/20C08K9/00C08L23/12
Inventor 牛艳华罗国君李光宪
Owner SICHUAN UNIV
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