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Method for preparing fiber-loaded beta nucleating agent and application thereof in modified polypropylene

A beta nucleating agent and polypropylene technology, which is applied to the preparation of fiber-loaded beta nucleating agent and its application in modified polypropylene, can solve the problems of poor toughness and low tensile strength of polypropylene, and achieve cost Low, less reaction process, simple process effect

Inactive Publication Date: 2010-01-06
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a preparation method of a uniquely designed fiber-loaded β-nucleating agent, and provides the application of this fiber-loaded β-nucleating agent in modified polypropylene, which can overcome the poor toughness of polypropylene and the existing modification Non-resilient polypropylene suffers from low tensile strength

Method used

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  • Method for preparing fiber-loaded beta nucleating agent and application thereof in modified polypropylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (6) 0.5g of carbon fiber was added to 40ml of 68% concentrated nitric acid solution at room temperature, and treated for 2 hours;

[0031] (7) Rinse the carbon fiber of surface functionalization repeatedly with distilled water to pH value is neutral, and grind;

[0032] (8) Accurately weigh 0.5 g of calcium stearate, prepare a 2% calcium stearate ethanol solution, and leave it to stand for later use; accurately weigh 0.5 g of pimelic acid, prepare a 2% pimelic acid ethanol solution, and leave it to stand for use. set aside;

[0033] (9) adding the carbon fiber obtained in the (7) step to the calcium stearate ethanol solution, stirring and mixing together, and being heated to 80° C. at a stirring speed of 2000 rpm to disperse, and reacting 1 under this temperature range Hour;

[0034] (10) pimelic acid ethanol solution is added in the product of the (9) step, at 80 DEG C, react with the stirring speed of 1000rpm, and the time is 1 hour;

[0035] (11) After the product...

Embodiment 2

[0037] (12) at room temperature, 0.5g carbon nanotubes are added to the mixed solution of 20ml 68% concentrated nitric acid and concentrated sulfuric acid, the volume ratio of concentrated nitric acid and concentrated sulfuric acid is 1:3, and processed for 1 hour;

[0038] (13) repeatedly rinsing the surface functionalized carbon nanotubes to pH neutrality with distilled water and grinding;

[0039] (14) Accurately weigh 0.5g calcium stearate, prepare 2% calcium stearate ethanol solution, and let stand for standby; accurately weigh 0.5g pimelic acid, prepare 2% pimelic acid ethanol solution, and keep it at rest. set aside;

[0040](15) the carbon nanotubes obtained in the (13) step are added to the calcium stearate ethanol solution, stirred and mixed together, and at a stirring speed of 1500 rpm, be warming up to 100° C. to disperse, and react in this temperature range 1 hour;

[0041] (16) adding pimelic acid ethanol solution to the product of the (15) step, and reacting a...

Embodiment 3

[0044] (18) 0.5g of carbon nanofibers was added to 30ml of 98% concentrated sulfuric acid solution at room temperature, and treated for 3 hours;

[0045] (19) repeatedly rinse the carbon nanofibers of surface functionalization with distilled water to a pH of 7 and grind;

[0046] (20) Accurately weigh 0.5g calcium stearate, prepare a 2% calcium stearate ethanol solution, and leave it to stand for later use; accurately weigh 0.5g pimelic acid, prepare a 2% pimelic acid ethanol solution, and keep it at rest. set aside;

[0047] (21) the carbon nanofibers that the (19) step obtains are added in the calcium stearate ethanolic solution, stir and mix together, and be warming up to 80 ℃ under the stirring speed of 1800rpm and make it disperse, and under this temperature range, react 2 Hours;

[0048] (22) pimelic acid ethanol solution is added in the product of the (21) step, at 80 DEG C, react with the stirring speed of 900rpm, and the time is 2 hours;

[0049] (23) After the pro...

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Abstract

The invention discloses a method for preparing a fiber-loaded beta nucleating agent and application thereof in modified polypropylene. The method comprises the following steps: functionalizing a fiber filling by a strong oxidizing acid solution and preparing a fatty acid salt solution and a dibasic organic acid solution with certain concentration; after the prepared fatty acid salt solution and the functionalizing ground fiber filling are mixed and react, adding the dibasic organic acid solution to a primary reactant to obtain grey white powdered solid after centrifuging and drying; and finally, adding the fiber-loaded beta nucleating agent to polypropylene according to a certain proportion by melt blending processing to obtain a final product. The fiber-loaded beta nucleating agent can obviously improve the toughness and the ductility of the polypropylene without reducing the yield strength and the flexural modulus of the polypropylene and has fewer reaction processes, small toxicity, simple process, easy operation, low cost and no pollution to environment.

Description

technical field [0001] The invention relates to the preparation of a fiber-supported polypropylene beta nucleating agent and its application in modified polypropylene. Background technique [0002] As a general-purpose plastic, polypropylene (PP) has the advantages of good tensile strength, hardness, excellent heat resistance, chemical resistance, electrical insulation, and easy processing and molding. However, there are still many deficiencies when used as structural materials, especially poor toughness and high low temperature brittleness. This greatly limits the further expansion of the application field of PP, so the modification of PP has important theoretical significance and broad commercial space. [0003] At present, the toughening modification of polypropylene mainly adopts copolymerization toughening, blending toughening, inorganic rigid particle toughening and adding β crystal nucleating agent. [0004] Copolymerization is a modification carried out at the poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/00C08L23/12
Inventor 杨伟王市伟杨鸣波谢邦互
Owner SICHUAN UNIV
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