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Nano composite polyformaldehyde material and its preparation

A nano-composite material and technology of composite material, applied in the field of polyoxymethylene nano-composite material and its preparation, can solve the problems of reduced modulus, reduced rigidity, increased cost, etc., and achieve cost reduction, solve processing problems, and simple and easy preparation method Effect

Inactive Publication Date: 2004-11-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the notched impact strength of the elastomer-toughened polyoxymethylene composite materials prepared by the above methods has been greatly improved, on the one hand, direct toughening with rubber elastomers will reduce the modulus and rigidity of the material, and on the other hand, due to The price of the added rubber elastic body is 3 to 4 times that of polyoxymethylene, and the amount is large (30 to 40%), resulting in a substantial increase in cost

Method used

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  • Nano composite polyformaldehyde material and its preparation

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Experimental program
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Effect test

Embodiment 1

[0021] After drying 200 grams of calcium carbonate with a particle size of 50 nanometers at 100°C for 6 hours, stir and mix with 10 grams of isopropyl trioleoyl phthalate at room temperature in a high-speed mixer; then mix with 200 grams at 90°C The polyurethane that has been dried for 5 hours is continuously stirred and mixed evenly in a high-speed mixer at a speed of 1000 rpm, and then melted and blended and extruded through a twin-screw extruder at 130-210°C to obtain a masterbatch: mix 8 grams of the masterbatch with ethylene - Dilute and disperse 10 grams of vinyl acetate copolymer in 382 grams of polyoxymethylene so that the calcium carbonate content is 1.0%, and then melt and blend at 140-200 ° C on a twin-screw extruder to obtain a polyoxymethylene nanocomposite material.

Embodiment 2

[0023] After drying 40 grams of silicon dioxide with a particle size of 80 nm at 130°C for 6 hours, stir and mix with 2 grams of γ-(methacryloxypropyl)trimethoxysilane in a high-speed mixer at room temperature and then continue to mix with 360 grams of polyurethane dried at 90°C for 5 hours in a high-speed mixer at a speed of 1000rpm, and then melt blending and extruding at 130-210°C through a twin-screw extruder to obtain a parent Material: 120 grams of masterbatch and 20 grams of grafted polyurethane are diluted and dispersed in 260 grams of polyoxymethylene, so that the silicon dioxide content is 3%, and then melted and blended at 140-200 ° C on a twin-screw extruder to obtain polyoxymethylene Formaldehyde nanocomposites.

Embodiment 3

[0025] After drying 160 grams of montmorillonite with a particle size of 150 to 200 nanometers at 110 ° C for 6 hours, stir and mix with 2 grams of hexadecyltrimethylammonium bromide in a high-speed mixer at room temperature; then mix with 240 grams of The acrylonitrile-butadiene rubber dried at 90°C for 5 hours is continuously stirred and mixed evenly at a speed of 1000rpm in a high-speed mixer, and then melted and blended and extruded at 130-210°C by a twin-screw extruder to obtain a masterbatch; 50 grams of masterbatch and 20 grams of phenolic resin are diluted and dispersed in 330 grams of polyoxymethylene, so that the content of montmorillonite is 5%, and then melted and blended on a twin-screw extruder at 140-200 ° C to obtain a polyoxymethylene nanocomposite material .

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Abstract

The present invention discloses one kind of nano composite polyformaldehyde material, and the composite contains polyformaldehyde 55-90 wt% and elastomer 2.5-30 wt% as well as characterized inorganic nano stuffing 0.1-10 wt% and compatibilizing agent 0.1-10 wt%. During the preparation, inorganic nano stuffing, compatibilizing agent and elastomer in certain proportion are smelted and mixed to obtain agglomerate; and the agglomerate is then diluted and dispersed in polyformaldehyde or polyformaldehyde / elastomer to obtain the product through further smelting and mixing. The present invention can strengthen and toughen polyformaldehyde while reducing cost.

Description

1. Technical field [0001] The invention belongs to the technical field of polyoxymethylene composite material and its preparation, and in particular relates to a polyoxymethylene nanocomposite material and a preparation method thereof. 2. Background technology [0002] Although polyoxymethylene is used in electronics, household appliances, automobiles, building materials and machinery due to its excellent comprehensive performance, it still has defects such as poor toughness, low notched impact strength, poor thermal stability and acid and alkali resistance, so it is Greatly limit the wider application of POM. Improving the toughness of polyoxymethylene has always been an important topic of polyoxymethylene modification, but the molecular chain of polyoxymethylene is regular, easy to crystallize and the size of spherulites is large; there are no reactive groups on the molecular chain, so the structural modification is difficult to realize. The usual modification method is t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/34C08K7/00C08L61/02
Inventor 傅强高小铃王跃林杨本意渠成
Owner SICHUAN UNIV
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