Fiber-reinforced polypropylene composition and foamed polypropylene composite material and preparation method thereof

A polypropylene composition and fiber reinforcement technology, applied in the field of modified polypropylene, can solve the problems of complex preparation method and high cost, and achieve the effects of excellent compressive performance, high compressive stress and high compressive rebound rate

Active Publication Date: 2022-01-21
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to improve the strength of existing fiber reinforced foam plastics, special fibers and additives are usually added, which leads to complex preparation methods and high costs for fiber reinforced foam plastics with high mechanical properties; otherwise, they can only be used as other composite materials Additive use of (e.g. films, pipes)

Method used

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  • Fiber-reinforced polypropylene composition and foamed polypropylene composite material and preparation method thereof
  • Fiber-reinforced polypropylene composition and foamed polypropylene composite material and preparation method thereof

Examples

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preparation example Construction

[0020] In the present invention, the preparation method of the polypropylene modifier comprises: contacting the polar monomer-grafted polypropylene in combination I or combination II with component A for reaction extrusion granulation, and then drying. Combination I or combination II consists of polar monomer grafted polypropylene and component A respectively.

[0021] In the combination I, the polar monomer in the polar monomer-grafted polypropylene is selected from maleic anhydride, acrylic acid, acrylate, methacrylic acid, methacrylate, vinyl tertiary carbonate, glycidyl methacrylate At least one of ester, dimethylamino methacrylate, epoxy acrylate, isocyanurate and acrylamide; said component A is selected from at least one of polyisocyanate and polyethylene oxide One; and the selected polar monomer is used in conjunction with the selected component A, which needs to undergo a chemical reaction during the reactive extrusion process.

[0022] Preferably, the acrylate is at ...

Embodiment approach

[0026] According to a specific embodiment, the first compound is 4,4'-diaminodiphenyl ether, phenoxyaniline, 3,4'-diaminodiphenyl ether and 3,3',4,4' - one or more tetraaminodiphenyl ethers, preferably phenoxyaniline and / or 3,3',4,4'-tetraaminodiphenyl ether.

[0027] In the present invention, the second compound may be one of alkylene diamine, alkylene diamine, alkylene triamine, alkylene tetramine, alkylene pentamine and aryl diamine or Various, such as C2-12 alkylene diamine, C2-12 alkylene diamine, C2-C12 alkylene triamine, C2-C12 alkylene tetramine, C2-C12 alkylene One or more of base pentamine and C6-C18 aryl diamine.

[0028] According to a specific embodiment, the second compound is tetraethylenepentamine, triethylenediamine, diethylenetriamine, triethylenetetramine, p-phenylenediamine, m-phenylenediamine, One or more of 1,8-octanediamine, 1,9-diaminononane, 1,10-diaminodecane and 1,12-diaminododecane.

[0029] In the present invention, in Combination I and Combinat...

Embodiment 1

[0058] (1) Preparation of polypropylene modifier

[0059] Weigh 99 parts of acrylic acid-grafted polypropylene (graft rate: 1.2%, MI 52 g / 10min, the same below), and 1 part of 2,4-xylene diisocyanate and mix well. Put the fully mixed raw materials into the HAAKE twin-screw extruder, the extrusion temperature is set at 190°C, the extruder speed is 50r / min, and the feeding speed is 3Hz. Extrude and granulate, and dry the obtained product at 90°C for 60 minutes to obtain a polypropylene modifier. The polypropylene modifier sample preparation is carried out infrared analysis, in the infrared spectrogram, 3350cm -1 and 1540cm -1 The carbamate characteristic peak generated after the reaction of -NCO and -OH appears, and -OH is at 3400cm -1 -3500cm -1 The characteristic peak at 1727cm -1 The characteristic peak at is significantly enhanced, indicating that acrylic acid reacts with isocyanate, and the prepared product is the target product.

[0060] (2) Preparation of foamed pol...

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Abstract

The invention relates to the field of modified polypropylene, and discloses a fiber-reinforced polypropylene composition, a foamed polypropylene composite material and a preparation method thereof. The fiber-reinforced polypropylene composition contains polypropylene, a polypropylene modifier, glass fibers, a foaming agent and a compatibilizer; the preparation method of the polypropylene modifier comprises: combining the poles in combination I or II The grafted polypropylene with permanent monomer is contacted with component A to react and extruded to pelletize. The fiber-reinforced polypropylene composition provided by the present invention can prepare foamed polypropylene composite materials with a relatively high expansion ratio, and the prepared foamed polypropylene composite materials have both high compression resilience and compressive stress at the same time, That is, it has excellent compression properties and can be used as a cushioning material.

Description

technical field [0001] The invention relates to the field of modified polypropylene, in particular to a fiber-reinforced polypropylene composition, a foamed polypropylene composite material and a preparation method thereof. Background technique [0002] Polymer foam materials have excellent properties such as light weight, low thermal conductivity, heat insulation, sound insulation and cushioning, and are widely used in daily use, packaging, transportation, construction and other fields. However, compared with the performance of ordinary solid polymers, the comprehensive mechanical properties of foamed plastics are relatively poor. The cell diameter of ordinary foamed plastics is generally greater than 50 μm. The existence of internal cells reduces the effective load-bearing cross-sectional area of ​​the material, resulting in the preferential rupture of the foamed material when the external force is applied, thereby reducing the overall performance of the foamed plastics. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L51/06C08K7/14C08J5/04C08J9/10C08J9/08C08J9/12
CPCC08J5/043C08J9/103C08J9/0061C08J9/0085C08J9/08C08J9/122C08J2203/04C08J2203/02C08J2203/06C08J2203/08C08J2323/12C08J2451/06C08K7/14
Inventor 于芳梁文斌马伊刘国刚张志成王曙光
Owner CHNA ENERGY INVESTMENT CORP LTD
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