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Process for preparing functional poly propylene material

A polypropylene material and a functionalized technology, which is applied in the field of preparation of functionalized polypropylene materials, can solve the problems of deep product and decreased mechanical properties, and achieve the effects of alleviating degradation reaction, reducing production cost and reducing irradiation treatment cost.

Inactive Publication Date: 2006-08-23
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the prior art method is to use fully irradiated polypropylene resin as the modified base material
The disadvantage is that the polypropylene material will be severely degraded after being irradiated, and the mechanical properties of the final functionalized polypropylene will drop sharply compared with the raw material polypropylene, and the product will also show a darker color.

Method used

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  • Process for preparing functional poly propylene material
  • Process for preparing functional poly propylene material
  • Process for preparing functional poly propylene material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The raw materials are copolymerized polypropylene and pre-irradiated copolymerized polypropylene. The polar unsaturated monomer is acrylic acid. The melt flow rate of the copolymerized polypropylene is 3.3g / 10min. It is isotactic polypropylene and the form is powder. Acrylic acid is a commercial Analytical reagents sold.

[0039] The pre-irradiation treatment of polypropylene is to spread the copolymerized polypropylene powder uniformly in an open container, and then transport it through the radiation area by an automatic conveyor. Under air conditions, it is pre-irradiated with an electron beam. The irradiation dose is 4kGy. Illumination dose rate 10 5 kGy / h, the irradiation time is 0.1s, and the melt flow rate of polypropylene after irradiation is 43.3g / 10min.

[0040] Mechanically mix 5 parts (mass) of the above-mentioned pre-irradiated polypropylene and 95 parts (mass) of unirradiated polypropylene to obtain a first-level pre-mixed resin; then add 0.8% acrylic acid base...

Embodiment 2

[0047] The raw materials are the same as in Example 1, the mass ratio of non-irradiated polypropylene and pre-irradiated polypropylene is changed to 90:10, the amount of polar unsaturated monomer acrylic acid is 0.8%, and the remaining steps are the same as in Example 1.

[0048] The grafting rate of the obtained product is 0.17%, and its melt flow rate is 4.3g / 10min, which is slightly larger than the value of the raw material polypropylene, indicating that there is a partial degradation reaction during the grafting process, and a small amount of low molecular weight products are produced. It is basically the same as the raw material polypropylene. Other physical and mechanical performance test results are shown in Table 1.

Embodiment 3

[0053] The raw materials are the same as in Example 1. The amount of pre-irradiated polypropylene is increased so that the mass ratio of polypropylene to unirradiated polypropylene is 15:85, and the amount of the polar unsaturated monomer acrylic acid is 0.8%. The remaining steps are the same as in Example 1. the same.

[0054] The grafting rate of the obtained product is 0.27%, the melt flow rate is 3.9g / 10min, and the tensile properties and impact strength are lower than that of the raw material. This is because the increase in the amount of pre-irradiated polypropylene produces more degradation , Resulting in a decrease in mechanical properties, which proves that the amount of pre-irradiated polypropylene used as an "initiator" can be easily adjusted to achieve the purpose of controlling the degree of degradation of the product. Other physical and mechanical performance test results are shown in Table 1.

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Abstract

The present invention provides functional polypropylene material preparing process, and adopts small amount of irradiated polypropylene as the initiator for the melt grafting of base polypropylene to prepare functional polypropylene. The present invention has the advantages of reduced degradation reaction, adjustable degradation degree, and lowered production cost. The prepared functional polypropylene has excellent metal adhering performance, and may be used the compatibilizer or main component for preparing polypropylene / polyester, polypropylene / polyamide and other alloy material.

Description

Technical field [0001] The invention belongs to the application of radiation treatment technology to polymer reactive graft modification, and specifically relates to a preparation method of functionalized polypropylene material. Background technique [0002] The graft copolymerization of polar unsaturated functional monomers and polyolefins is the main method of polyolefin modification. This technical process is simple and easy to operate. The polar segments grafted on the polyolefin skeleton give the material many new features. For example, it enhances the adhesion of polyolefins to metals, ceramics and other materials, and improves the surface interaction between polyolefins and other polar polymers (such as polyamides, polyesters, etc.) or inorganic fillers. The realization of graft copolymerization usually uses organic peroxides as initiators, but the half-life of the initiators and the reactivity of the free radicals generated by the decomposition of the initiators with the ...

Claims

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Application Information

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IPC IPC(8): C08L23/10C08J3/28B29C47/00
Inventor 殷敬华蔡传伦朱连超李莉莉尹立刚唐功本
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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