A kind of polypropylene-based composite material and preparation method thereof

A composite material, polypropylene-based technology, applied in the field of polypropylene-based composite materials and their preparation, can solve the problems of low grafting rate, uncontrollable internal reaction, complex system, etc. Large-scale industrial production, the effect of simple and convenient preparation process

Active Publication Date: 2021-04-09
义乌斌泰工艺品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to use styrene as the second grafting monomer and polyfunctional esters as the third grafting monomer. The system is complicated and the internal reaction is uncontrollable; and the melting grafting process and subsequent purification process are relatively tedious and difficult. To meet the needs of industrialization
[0007] At present, the compatibilizer used in PP / PA composites or glass fiber reinforced polypropylene composites is generally the traditional maleic anhydride grafted polypropylene compatibilizer (PP-g-MAH), while the traditional PP functionalized graft The method generally has disadvantages such as low grafting rate and high residual amount of maleic anhydride monomer, which inhibits the compatibilization effect of functionalized grafted polypropylene to a certain extent, and the mechanical properties of composite materials are therefore limited to a certain extent.

Method used

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  • A kind of polypropylene-based composite material and preparation method thereof
  • A kind of polypropylene-based composite material and preparation method thereof
  • A kind of polypropylene-based composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Preparation of maleic anhydride grafted polypropylene compatibilizer (marked as A):

[0067] Add 100 g of polypropylene powder (brand PP-H-GD320), 20 g of benzoyl peroxide, and 150 ml of xylene as a surfactant into the reactor replaced by high-purity nitrogen, first raise the temperature to 80°C and swell for 1 h, then Adjust the temperature to 100°C for degradation for 1 hour to obtain high-fluidity polypropylene powder, then add 10 g of azobisisobutyronitrile and 15 g of maleic anhydride into the above-mentioned reactor containing high-fluidity polypropylene, and adjust The temperature was raised to 80°C for 5 h. After the reaction, the obtained sample was separated and purified with acetone and dried by suction filtration;

[0068] Through melt flow index measurement, the melt flow index of gained polypropylene compatibilizer is 56 g / 10 min, figure 1 It is the infrared absorption spectrum of the maleic anhydride grafted polypropylene compatibilizer, from which it ca...

Embodiment 2

[0070] Preparation of glycidyl methacrylate grafted polypropylene compatibilizer (labeled B):

[0071] Add 100 g of polypropylene (grade PP-H-GD320), 10 g of di-tert-butyl peroxide, and 150 ml of xylene as a surfactant into the reactor, first raise the temperature to 60°C and swell for 1 hour, then adjust the temperature to 80°C Perform degradation for 2 hours to obtain high-fluidity polypropylene, then add 15 g of azobisisoheptanonitrile and 100 ml of glycidyl methacrylate into the above-mentioned reactor containing high-fluidity polypropylene, and adjust the temperature to 90°C for reaction After 3 h, the obtained sample was separated and purified with acetone and dried by suction filtration.

[0072] According to the melt flow index measurement, the melt flow index of the obtained polypropylene compatibilizer was 82 g / 10 min. figure 2 It is the infrared absorption spectrum of glycidyl methacrylate grafted polypropylene compatibilizer, from which it can be observed that gl...

Embodiment 3

[0074] Preparation of maleic anhydride grafted polypropylene compatibilizer (marked as C):

[0075] Add 100 g of polypropylene (grade PP-H-GD320), 15 g of di-tert-butyl peroxide, and 30 ml of n-hexane as a surfactant into the reactor, first raise the temperature to 80°C and swell for 1 hour, then adjust the temperature to 90°C Perform degradation for 3 hours to obtain high-fluidity polypropylene, then add 8 g of azobisisoheptanonitrile and 50 g of maleic anhydride into the above-mentioned reactor containing high-fluidity polypropylene, and adjust the temperature to 90 ° C for 6 h, After the reaction, the obtained sample was separated and purified with acetone and dried by suction filtration.

[0076] The melt flow index was measured by the melt flow index, and the melt flow index of the obtained polypropylene compatibilizer was 97g / 10 min, and the maleic anhydride grafting rate was further determined to be 1.06%.

[0077] Preparation Technology of Polypropylene-Based Composit...

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Abstract

The invention discloses a polypropylene-based composite material and a preparation method thereof. The polypropylene-based composite material is composed of the following materials, based on 100 parts by weight of polypropylene, 10-100 parts of polyamide, functionalized polypropylene 2~30 parts of compatibilizer, 0.5~5 parts of lubricant, 0.5~5 parts of plasticizer, 0.01~1 part of stabilizer. The addition of the new functional polypropylene compatibilizer can promote the mutual mixing of polypropylene and polyamide, and the compatibilization effect is obvious. The synthesis of functional polypropylene compatibilizer can keep the original shape of polypropylene powder and reduce the The steps of subsequent material reprocessing and molding, the adjustment of the temperature of each heating section and the rotation speed of the screw during the blending and extrusion of polypropylene-based composite materials can greatly promote the dispersion of functional polypropylene compatibilizers in polypropylene and polyamide , so as to well demonstrate the compatibilizing effect of the functionalized polypropylene compatibilizer, the preparation process is simple and convenient, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a polypropylene-based composite material and a preparation method thereof, belonging to the field of polymer material modification technology and application. Background technique [0002] Polypropylene (PP) has a simple synthesis method, low price, light weight, low water absorption, outstanding stress crack resistance, wear resistance, and easy processing and molding. It is a general-purpose plastic that is widely used. However, polypropylene products have poor weather resistance, high static electricity, poor dyeability, printability and adhesion, low low-temperature impact strength, and poor creep resistance. [0003] Combining PP with other plastics or inorganic fillers can effectively improve its performance and expand the application range of polypropylene products. However, since PP is a non-polar polymer, there is always the problem of poor compatibility when PP is compounded with other materials. Adding a compatibili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L77/02C08L51/06C08L23/06C08L91/00C08K5/134
CPCC08L23/12C08L2205/035C08L2205/08C08L77/02C08L51/06C08L23/06C08L91/00C08K5/1345
Inventor 于翔曹伟娜李俊徐茜丁宁王延伟
Owner 义乌斌泰工艺品有限公司
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