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Process for preparing functional poly propylene material

A polypropylene material and functionalization technology, which is applied in the field of preparation of functionalized polypropylene materials, can solve the problems of product depth and mechanical property decline, and achieve the effects of reducing degradation reactions, reducing production costs, and reducing radiation treatment costs

Inactive Publication Date: 2009-06-10
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 its form is powder. analytically pure reagents.

[0039] The pre-irradiation treatment of polypropylene is to spread the copolymerized polypropylene powder evenly in an open container, and then transport it through the irradiation area by an automatic conveying device, and pre-irradiate it with electron beams under air conditions. 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] 5 parts (quality) of the above-mentioned pre-irradiated polypropylene and 95 parts (quality) of non-irradiated polypropylene are mechanically mixed to obtain a primary premixed resin; Mechanically mixing with the above primary premix to obtain a secondary premix; th...

Embodiment 2

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

[0048] The graft rate that obtains product is 0.17%, and its melt flow rate is 4.3g / 10min, and the value slightly larger than raw material polypropylene, shows that there is the degradation reaction of part in grafting process, has produced a small amount of low molecular weight product, color It is also basically the same as the raw material polypropylene. The test results of other physical and mechanical properties are shown in Table 1.

Embodiment 3

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

[0054] The grafting ratio of the obtained product is 0.27%, its melt flow rate is 3.9g / 10min, and the tensile properties and impact strength are all lower than those 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, proving that the amount of pre-irradiated polypropylene as the "initiator" can be easily adjusted to control the degree of degradation of the product. The test results of other physical and mechanical properties 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 in polymer reaction grafting modification, and specifically relates to a preparation method of functionalized polypropylene material. Background technique [0002] The graft copolymerization reaction of polar unsaturated functional monomers and polyolefins is the main means of polyolefin modification. This technology is simple and easy to operate. properties, such as enhancing the adhesion of polyolefins to metals, ceramics and other materials, and improving 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 peroxide as initiator, but the half-life of the initiator, the reactivity of free radicals generated by the decomposition of the initiator and the components such as polyolefin substrate, functional monomer and initiator, etc. The sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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