Preparation method of polypropylene nano composite material

A technology of nanocomposite materials and polypropylene, which is applied in the field of polymer materials, can solve problems such as no method for solving nanoparticle agglomeration, and achieve the effects of reducing agglomeration, enhancing modification effects, and improving toughness

Active Publication Date: 2011-06-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN101020775A discloses a method for obtaining high-strength and high-toughness polypropylene modified materials by adding a reinforcing agent and a toughening agent, wherein the reinforcing agent can be nanoparticles, and the toughening agent can be a β-crystal nucleating agent, but it does not propose to solve the problem of nanoparticle and method of agglomeration of nucleating agents in polypropylene matrix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 50 grams of β crystal nucleating agent zinc phthalate (the dibasic carboxylic acid organic class β crystal nucleating agent of the IIB group element), 300 grams of organically modified nano-calcium carbonate (the brand is YH306) and 2 grams respectively Antioxidant (1010 and 168 are respectively 1 gram) mix, add respectively to 1000 grams of maleic anhydride grafted polypropylene (brand is PP-G-1, melt flow rate 2.16g / 10min, grafting rate 0.8%) , mixed uniformly in a high mixer, extruded and granulated with a twin-screw extruder, and respectively made into a masterbatch with a nucleating agent content of 5% and a masterbatch with a nano calcium carbonate content of 30%. Then respectively take by weighing 20 grams of maleic anhydride grafted polypropylene masterbatch adding PA-01 and 217 grams of maleic anhydride grafted polypropylene masterbatch adding nano-calcium carbonate, and 763 grams of polypropylene (homopolymer, trade mark T30S Melt flow rate 2.5g / 10min, density...

Embodiment 2

[0053] Step is identical with embodiment 1, wherein matrix homopolypropylene is changed into block copolymerization polypropylene (brand C180, melt flow rate 0.3g / 10min (230 ℃, 2.16kg)), the content of the nano calcium carbonate of organic modification 35%. In the mixture, the weight percentages of nucleating agent and nano-calcium carbonate are 2% and 3.5% respectively, and the properties of the obtained material are as follows: the notched impact strength is 785.4J / m, the flexural modulus is 1010MPa, and the heat distortion temperature is 106°C .

[0054] As a comparison, the notched impact strength of pure copolymerized polypropylene is 486.7J / m, the flexural modulus is 903MPa, and the heat distortion temperature is 84°C.

Embodiment 3

[0056] The steps are the same as in Example 1, wherein the β crystal nucleating agent is replaced by NABW (amide β crystal nucleating agent), and the content is 5%; the content of organically modified nano-calcium carbonate is 20%. In the mixture, the weight percent concentrations of the nucleating agent NABW and the organically modified nano-calcium carbonate are 0.1% and 5% respectively. The properties of the obtained material are as follows: the notched impact strength is 37.2 J / m, the flexural modulus is 1088 MPa, and the heat distortion temperature is 98°C.

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Abstract

The application of the invention discloses a preparation method of a polypropylene nano composite material, which comprises the following steps of: (1) proportionally fusing and blending inorganic nano particles and maleic anhydride grafted polypropylene on an internal mixer, an open mill or a screw extruder to obtain a reinforcing agent master batch; (2) proportionally fusing and blending a beta crystal type nucleating agent and the maleic anhydride grafted polypropylene on the internal mixer, the open mill or the screw extruder to obtain a flexibilizer master batch; and (3) proportionally diluting and dispersing the reinforcing agent master batch and the flexibilizer master batch in a polypropylene high-polymer substrate, and carrying out injection molding to obtain the polypropylene nano composite material. With the preparation method, the technical problem that the nano particles and the nucleating agent agglomerate in the polypropylene substrate is well solved; when the flexibility of the modified polypropylene material is greatly improved, strength, rigidity, heat deflection temperature and other parameters are also improved to a certain extent, and simultaneously the density of the material is hardly increased so that a series of high-strength, high-flexibility and high-heat resistance modified polypropylene materials can be prepared.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a polypropylene nanocomposite material. Background technique [0002] Polypropylene (PP) has been widely used because of its low density, excellent electrical properties, corrosion resistance, hygiene, moisture resistance, and good processability. However, polypropylene also has disadvantages such as poor toughness (especially low notched impact strength), insufficient high-temperature strength rigidity, and low heat resistance, which limit its use in wider fields, especially as engineering materials in automobiles, manufacturing, and construction. , chemical pipelines and other high-end applications. It is of great application value to carry out high-performance modification research on polypropylene to improve the comprehensive performance of polypropylene, thereby extending the application of polypropylene to certain fields of tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/10C08L53/00C08L51/06C08J3/22
Inventor 蔡智辛忠赵世成倪杰徐娜王涛刘明清徐盛虎王忠罗光
Owner CHINA PETROLEUM & CHEM CORP
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