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Polypropylene foam material with gradient pore structure and preparation method thereof

A polypropylene foam, gradient hole technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., achieves the effects of simple preparation process, mild pressure conditions, and low equipment requirements

Active Publication Date: 2020-11-03
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these reported methods have high requirements on the compatibility of blended materials and the balance of comprehensive properties after blending.

Method used

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  • Polypropylene foam material with gradient pore structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of the polypropylene foam material with gradient cell structure comprises the following steps:

[0036] 1) Weigh three proportions of copolymerized polypropylene (Yanshan Petrochemical PP4220), polyethylene glycol 6000, montmorillonite and antioxidant B215, mix and feed them separately, and multi-layer co-extrude, wire drawing, Pelletizing to obtain polypropylene resin particles distributed in three layers;

[0037] In each proportion, the amount of polyethylene glycol 6000 is 0.8%, 0.2%, 0.04%; the amount of montmorillonite is 0.04%, 0.5%, 0.8%, and the amount of antioxidant added is 0.2wt %;

[0038] 2) Put the three-layer distribution of polypropylene resin particles in the reaction kettle, feed air as a foaming agent, control the pressure in the kettle to 5Mpa, the temperature is 125°C and the saturation time is 1h, and the foaming temperature is 140°C, and the pressure is quickly released to obtain 0.05g / cm 3 The expanded particles with a ...

Embodiment 2

[0040] The preparation method of the polypropylene foam material with gradient cell structure comprises the following steps:

[0041] 1) Weigh three proportions of copolymerized polypropylene (Yanshan Petrochemical PP4220), glycerin, carbon nanotubes (diameter 50-90nm, length 5-10um) and antioxidant B215, mix and feed them separately, and pass through the extruder Extrusion, wire drawing, and pelletizing to obtain three kinds of polypropylene resin particles with different compositions;

[0042] In each proportion, the added amounts of glycerin were 2.7%, 0.1%, and 0.03% respectively; the added amounts of carbon nanotubes were respectively 0.03%, 0.1%, and 0.7%; the added amounts of antioxidants were all 0.2wt%;

[0043] 2) Three kinds of polypropylene resin particles with different compositions were molded into sheets, superimposed in the mold, melted and molded at high temperature to obtain a polypropylene resin sheet with multi-layer distribution, filled into the mold of a ...

Embodiment 3

[0045] The preparation method of the polypropylene foam material with gradient cell structure comprises the following steps:

[0046] 1) Weigh three proportions of polypropylene (Tm=167°C, Daqing Petrochemical T30S), alcohols, talc powder (2500 mesh) and antioxidant B215, mix and feed them separately, extrude through an extruder, and draw , cutting into pellets to obtain polypropylene resin particles with three different compositions;

[0047] Among them, the alcohols are polyethylene glycol and glycerin (weight ratio 1:1, PEG4000), the total addition amount is 3.0%, 0.5%, 0.1% respectively; the addition amount of talcum powder is 0.1%, 0.5%, 1.0% respectively; The addition amount of antioxidant is 0.2wt%;

[0048] 2) Three kinds of polypropylene resin particles with different compositions are molded into sheets respectively, superimposed in the mold, melted and molded at high temperature to obtain a polypropylene resin sheet with multi-layer distribution, filled into the mol...

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Abstract

The invention discloses a polypropylene foam material with a gradient pore structure and a preparation method thereof, belongs to the technical field of foam materials, and solves the problem to provide a preparation method of a foam material, which has the advantages of being simple in process, low in equipment requirement, capable of realizing gradient change of foam and pores in the foam material and meeting the characteristics of different structures and performance requirements in different parts in the material application field. According to the preparation method, polypropylene, alcohols and a nucleating agent are firstly weighed according to different proportions; multi-layered polypropylene resin particles can be obtained by multi-layer co-extruding, drawing and pelletizing, or polypropylene resin particles having various components can be obtained by extrusion by an extruder, drawing and pelletizing, and multi-layered polypropylene resin sheets can be obtained by mould pressing into sheets, superimposing and melting-molding; and finally the multi-layered particles or the multi-layered sheets are foamed to obtain the polypropylene foam material with the gradient pore structure. The preparation method is simple, the operation is convenient, equipment requirement is low, and the gradient of the foam and pores in the foam material can be regulated.

Description

technical field [0001] The invention belongs to the technical field of polymer foam materials, and in particular relates to a polypropylene foam material with a gradient pore structure and a preparation method thereof. Background technique [0002] At present, with the continuous improvement of performance requirements for various functional materials in nuclear energy, electronics, optics, chemistry, electromagnetics, biomedicine and other fields, the design of functionally graded materials provides the possibility for the realization of various material performance preparations. Functionally graded materials are two or more raw materials with different properties, and the elements (composition, structure) that make up the material are continuously changed along a certain direction by using a different composite technology than before, so that the properties and functions of the material are also changed. New materials with gradient changes. As a kind of functionally grade...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08L71/02C08K3/34C08K5/134C08K5/526C08J9/12C08J9/14B32B27/28B32B27/32B32B27/06B32B9/00B32B9/04
CPCB32B9/00B32B9/04B32B27/06B32B27/28B32B27/32C08J9/122C08J9/141C08J2203/14C08J2323/14C08J2471/02
Inventor 唐涛邱健邢海平姜治伟李明罡王凯薛俭
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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