Nano-particle and elastomer reinforcing and toughening polypropylene composite material and preparation method thereof

A technology of nanoparticles and composite materials, which is applied in the field of polypropylene composite materials reinforced and toughened by nanoparticles and elastomers and its preparation, can solve the problems that it is difficult to improve the mechanical properties and anti-aging properties of polypropylene materials at the same time, and achieve Effect of increasing Vicat heat distortion temperature, improving impact resistance and anti-aging performance, and expanding application range

Active Publication Date: 2013-06-12
ZHEJIANG YULONG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, although the modification of polypropylene materials by inorganic nanoparticles or thermoelastomers can improve the strength and toughness of materials, it is difficult to improve the mechanical properties and anti-aging properties of polypropylene materials in the prior art.

Method used

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  • Nano-particle and elastomer reinforcing and toughening polypropylene composite material and preparation method thereof
  • Nano-particle and elastomer reinforcing and toughening polypropylene composite material and preparation method thereof
  • Nano-particle and elastomer reinforcing and toughening polypropylene composite material and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0027] (1) Preparation of surface modified nanoparticles

[0028] Add nanoparticles, surfactants and optional organic antioxidants into a high-speed mixer at a mass ratio of 1.0:0.01-0.05:0-0.05, and stir for 50-100°C at a temperature of 80-150°C min, coating the surfactant on the nanoparticles to form surface-modified nanoparticles; the nanoparticles are composed of organic montmorillonite (OMMT), nano-titanium dioxide and nano-hydrotalcite (LDH);

[0029] (2) Preparation of maleic anhydride grafted polypropylene (PP-g-MAH)

[0030] Polypropylene, maleic anhydride and free radical initiator are mixed in a high-speed mixer according to the mass ratio of 1.0:0.1-0.2:0.01-0.02, melted and blended by a twin-screw extruder, and subjected to reactive extrusion. The extrusion temperature is 180 -230°C, the screw speed is 80-210 rpm to obtain maleic anhydride grafted polypropylene;

[0031] (3) Preparation of polypropylene composite materials

[0032] The surface-modified nanopart...

Embodiment 1

[0039] Step 1: Add nanoparticles with an average particle size of 5-100nm and oleic acid into a high-speed mixer at a mass ratio of 1.0:0.02, and stir for 50-100 minutes at a temperature of 100-120°C to form a surface Modified nanoparticles; the nanoparticles are composed of 40wt% OMMT, 30wt% nano-titanium dioxide, 30wt% LDH; second step: isotactic polypropylene, maleic anhydride and dicumyl peroxide according to 1.0 The mass ratio of 0.1:0.01 is mixed by a high-speed mixer, melted and blended by a twin-screw extruder, and subjected to reactive extrusion. The extrusion temperature is 180-230 ° C, and the screw speed is 80-210 rpm to obtain maleic anhydride grafted Polypropylene; the third step: the surface-modified nanoparticles obtained in the first step, the maleic anhydride grafted polypropylene (PP-g-HAM) obtained in the second step, ethylene-propylene-diene rubber (EPDM) and ethylene- Octene copolymer (POE) and waste polypropylene 1 are mixed in a high-speed mixer accordi...

Embodiment 2

[0041] Step 1: Add nanoparticles with an average particle size of 5-100nm and oleic acid into a high-speed mixer at a mass ratio of 1.0:0.05, and stir for 75-100 minutes at a temperature of 120-150°C to form a surface Modified nanoparticles; the nanoparticles are made up of 50wt% OMMT, 25wt% nano-titanium dioxide, 25wt% LDH; the second step: isotactic polypropylene, maleic anhydride and dicumyl peroxide according to 1.0 The mass ratio of 0.2:0.02 is mixed by a high-speed mixer, melted and blended by a twin-screw extruder, and subjected to reactive extrusion. The extrusion temperature is 180-230 ° C, and the screw speed is 80-210 rpm to obtain maleic anhydride grafted Polypropylene; the third step: the surface-modified nanoparticles obtained in the first step, the maleic anhydride grafted polypropylene (PP-g-HAM) obtained in the second step, ethylene-propylene-diene rubber (EPDM) and ethylene- Octene copolymer (POE) and waste polypropylene 1 are mixed in a high-speed mixer acco...

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Abstract

The invention relates to a preparation method of the nano-particle and elastomer reinforcing and toughening polypropylene composite material, belonging to the technical field of the polypropylene composite material. The preparation method comprises the following steps of: (1) coating nano-particles by using a surface active agent to form surface modified nano-particles, wherein the nano-particles are organic montmorillonite, nano-titanium dioxide and nano-hydrotalcite; (2) forming maleic anhydride grafted polypropylene by using free radical reaction; and (3) melting and blending the surface modified nano-particles, the maleic anhydride grafted polypropylene, ethylene propylene diene rubber, an ethylene-octylene copolymer and polypropylene in a two-screw extruder, thus obtaining the polypropylene composite material. The preparation method has the advantages of being applied to modification of waste polypropylene, being capable of improving the mechanical property and ageing resistance of the waste polypropylene, realizing the cyclic utilization of the waste polypropylene material, being beneficial to environmental protection and reducing the using amount of plastic raw materials; and the performance of the modified waste polypropylene can meet or exceed the standard requirements of PP plastic parts for motorcycles and electric vehicles.

Description

technical field [0001] The invention relates to the technical field of polypropylene composite materials, more specifically, the invention relates to a polypropylene composite material reinforced and toughened by nanoparticles and elastomers and a preparation method thereof. Background technique [0002] Polypropylene (polypropylene PP) is a polymer polymerized by using propylene as a monomer and using N-Z catalysts. As a general-purpose plastic, polypropylene has been widely used in various fields of industrial production and daily life due to its advantages of low density, good rigidity, high strength, low water absorption, high chemical stability, non-toxic, tasteless and excellent processing performance, such as its It has been widely used in motor vehicles, household appliances, daily necessities, fixtures and packaging industries. Although polypropylene has good mechanical properties, it has a large shrinkage rate and poor dimensional stability of the product; and it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L51/06C08L23/16C08L23/08C08K9/10C08K3/34C08K3/22C08K3/26B29C47/92B29C48/92
Inventor 周正富
Owner ZHEJIANG YULONG TECH DEV
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