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Preparation method for nano particle-modified polypropylene composite sheet

A composite sheet and nanoparticle technology, applied in the field of composite material manufacturing, can solve the problems of heat resistance and mechanical properties of foamed materials, large loss of tensile strength of modified materials, and difficulty in foaming molding, etc., to achieve increased Effects of crosslink density, improvement of mechanical properties and heat resistance, and ease of handling

Active Publication Date: 2016-10-12
JIN BAOLI TECH SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The impact strength of polypropylene is poor, and the low temperature brittleness is particularly prominent. Currently, ethylene-propylene-diene monomer (EPDM) and ethylene-octene copolymer (POE) are used to modify the notched impact strength of polypropylene, but the modified material Greater loss of tensile strength
Due to the sharp drop in viscosity and low melt strength of polypropylene when it melts, foam molding is very difficult. Cross-linking technology can be used to increase the melt viscosity of the system to prepare foamed polypropylene. Degradation and crosslinking will occur simultaneously during the process, which will affect the final heat resistance and mechanical properties of the foamed material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method of nanoparticle modified polypropylene composite sheet, the steps are as follows: 1Kg ethyl cyanoacrylate, 800g phenyl benzoate, 10g sodium dodecylsulfonate, 80g nanoporous nickel oxide and 300g tributyl phosphate Add the ester to the first extruder and extrude at 90°C to obtain a modified film; 5Kg homopolypropylene, 1.5Kg alkyl glucose amide, 550g surface-coupled triethylamine nano-silica, 1.5KgAC foaming agent Add it into the second extruder, and extrude at 220°C to obtain a polypropylene foam sheet; hot-press composite modified film and polypropylene foam sheet to obtain a nanoparticle-modified polypropylene composite sheet; the heat distortion temperature is 158°C, tensile strength 38.8Mpa, bending strength 52.6MPa.

Embodiment 2

[0020] A preparation method of nanoparticle modified polypropylene composite sheet, the steps are as follows: 1Kg ethyl cyanoacrylate, 800g phenyl benzoate, 10g sodium dodecylsulfonate, 80g nanoporous nickel oxide and 300g tributyl phosphate Add the ester to the first extruder and extrude at 90°C to obtain a modified film; 5Kg homopolypropylene, 1.5Kg alkyl glucose amide, 550g surface-coupled triethylamine nano-silica, 1.5KgAC foaming agent Add it into the second extruder, and extrude at 240°C to obtain a polypropylene foam sheet; hot-press composite modified film and polypropylene foam sheet to obtain a nanoparticle-modified polypropylene composite sheet; the heat distortion temperature is 154°C, tensile strength 38.1Mpa, bending strength 52.1MPa.

Embodiment 3

[0022] A preparation method of nanoparticle modified polypropylene composite sheet, the steps are as follows: 1Kg ethyl cyanoacrylate, 800g phenyl benzoate, 10g sodium dodecylsulfonate, 80g nanoporous nickel oxide and 300g tributyl phosphate Add the ester to the first extruder and extrude at 100°C to obtain a modified film; 5Kg homopolypropylene, 1.5Kg alkyl glucose amide, 550g nano-silica with triethylamine coupled to the surface, 1.5KgAC foaming agent Add it into the second extruder, and extrude at 220°C to obtain a polypropylene foam sheet; hot-press composite modified film and polypropylene foam sheet to obtain a nanoparticle-modified polypropylene composite sheet; the heat distortion temperature is 155°C, tensile strength 38.1Mpa, bending strength 52.4MPa.

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Abstract

The invention discloses a preparation method for a nano particle-modified polypropylene composite sheet. The preparation method comprises the following steps: adding a modifying composition into a first extruding machine, and extruding at 90 to 120 DEG C to obtain a modified thin film; adding a polypropylene composition into a second extruding machine, and extruding at 220 to 240 DEG C to obtain a polypropylene foamed sheet; compounding the modified thin film and the polypropylene foamed sheet to obtain the nano particle-modified polypropylene composite sheet, wherein the modifying composition consists of ethyl cyanoacrylate, phenyl benzoate, sodium dodecyl sulphate, nano porous nickel oxide and tributyl phosphate; the polypropylene composition consists of homo-polypropylene, N-acyl-N-methyl glucamine, nanosilicon dioxide of which the surface is coupled with triethylamine, and a foaming agent. According to the preparation method, the compositions are molten by adopting simple extruding machines and are extruded to obtain a main body and a modifying body material; a composite plastic sheet is prepared by utilizing a multilayer compounding manufacturing method; the operation is easy and convenient; the produced composite sheet has the characteristics of good heat resistance, mechanical properties and the like.

Description

technical field [0001] The invention relates to a method for manufacturing a composite material, in particular to a method for preparing a nanoparticle-modified polypropylene composite sheet, which can obtain a polypropylene sheet with excellent performance. Background technique [0002] Polypropylene has the advantages of good mechanical properties, non-toxicity, low relative density, chemical resistance, easy processing and molding, etc. It also has transparency and gloss, and can be widely used in medical syringes, food containers, microwave cookers and other occasions. The impact strength of polypropylene is poor, and the low temperature brittleness is particularly prominent. Currently, ethylene-propylene-diene monomer (EPDM) and ethylene-octene copolymer (POE) are used to modify the notched impact strength of polypropylene, but the modified material The loss of tensile strength is large. Due to the sharp drop in viscosity and low melt strength of polypropylene when it ...

Claims

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Application Information

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IPC IPC(8): B32B37/06B32B37/10B32B27/30B32B27/32B32B27/18B32B27/08C08L23/12C08L33/08C08K13/04C08K7/24C08K5/523C08K5/42C08K5/105C08K9/04C08K3/36C08J9/10
CPCB32B27/065B32B27/08B32B27/18B32B27/308B32B27/32B32B37/06B32B37/10B32B2250/02B32B2307/306C08J9/103C08J2203/04C08J2323/12C08K3/36C08K5/105C08K5/42C08K5/523C08K7/24C08K9/04C08K13/04C08K2201/011C08L2201/08C08L33/08C08L23/12
Inventor 李明华
Owner JIN BAOLI TECH SUZHOU
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