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Process for preparing polyolefin and vinyl monomer graft copolymer

A vinyl monomer and graft copolymer technology, which is applied in the synthesis field of polyolefin and vinyl monomer graft copolymer, can solve the problems of high energy consumption, high reaction temperature and slow reaction speed in the production process, and achieve Improve the rate of grafting reaction, overcome the effects of high reaction temperature and shortened production cycle

Inactive Publication Date: 2007-02-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention overcomes the disadvantages of high reaction temperature, slow reaction speed, long reaction time, high energy consumption in the production process and pollution to the environment during the synthesis of existing polyolefin and vinyl monomer graft copolymers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The weight fraction consumption of each component is as follows:

[0033] 100g powdered polyethylene

[0034] Methyl methacrylate 10g

[0035] Dibenzoyl peroxide 0.05g

[0036] water 250g

[0037] Put the various raw materials in the above formula into a microwave-specific reaction bottle with a stirring and reflux device in turn, and carry out the aqueous phase suspension grafting reaction for 10 minutes under the microwave radiation power of 2000 watts to obtain polyethylene grafted methyl Methyl acrylate copolymer. Under the same formula, when the graft copolymer is synthesized by aqueous phase suspension grafting using the traditional thermal heating method, it needs to be reacted at 100°C for 4 hours. The product performance comparison is shown in Table 1:

[0038] indicators

[0039] It can be seen that the reaction time of the polyethylene grafted methyl methacrylate copolymer prepared by the microwave-assisted synthesis technology of the present in...

Embodiment 2

[0041] The weight fraction consumption of each component is as follows:

[0042] 100g high density polyethylene

[0043] Methyl methacrylate 50g

[0044] Glycidyl methacrylate 50g

[0045] Dicumyl peroxide 2.5g

[0046] water 600g

[0047] Put the various raw materials in the above formula into a microwave-specific reaction bottle with stirring and reflux devices in turn, and carry out the aqueous phase suspension grafting reaction for 120 minutes under the microwave radiation power of 150 watts to obtain polyethylene grafted methyl Copolymer of methyl acrylate and glycidyl methacrylate. Under the same formula, when the graft copolymer is synthesized by solid-phase grafting using the traditional thermal heating method, it needs to be reacted at 100°C for 3 hours. The product performance comparison is shown in Table 2:

[0048] indicators

[0049] It can be seen that the polyethylene graft methyl methacrylate and glycidyl methacrylate copolymer prepared by the mi...

Embodiment 3

[0051] The weight fraction consumption of each component is as follows:

[0052]100g low density polyethylene

[0053] Methyl methacrylate 50g

[0054] Maleic anhydride 25g

[0055] Dibenzoyl peroxide 1.5g

[0056] water 500g

[0057] Put the various raw materials in the above formula into a microwave-specific reaction bottle with a stirring and reflux device in turn, and carry out a water-phase suspension grafting reaction for 150 minutes under a microwave radiation power of 100 watts to obtain polyethylene grafted methyl Copolymer of methyl acrylate and maleic anhydride. Under the same formula, when the graft copolymer is synthesized by solid-phase grafting using the traditional thermal heating method, it needs to be reacted at 100°C for 2.5 hours. The product performance comparison is shown in Table 3:

[0058] indicators

[0059] Visible, adopt the polyethylene graft methyl methacrylate and the maleic anhydride copolymer prepared by microwave-assisted synthe...

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PUM

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Abstract

The invention relates to a method for synthesizing a graft copolymer of polyolefin and vinyl monomers, which comprises: mixing the polyolefin, vinyl monomers, initiator with water homogeneously, proceeding with suspension grafted reaction in water phase for 10-150 min in a microwave irradiation range of 100-2000 W to get the copolymer of polyolefin and vinyl monomers. Using suspension grafted reaction in water phase and microwave auxiliary synthetic technique to make copolymer of polyolefin and vinyl monomers in the invention, and the polymerization reaction rate improves clearly, reaction period decreases greatly and cost decreases sharply.

Description

technical field [0001] The invention relates to the technical field of microwave synthesis, in particular to a synthesis method of polyolefin and vinyl monomer graft copolymer. Background technique [0002] Polyolefins—such as the most common large-scale plastics polypropylene (PP) and polyethylene (PE), have the advantages of low price, good comprehensive performance, and wide application range. Their chemical composition and molecular structure determine that PP and PE are both Non-polar materials, resulting in poor coloring, printing, electroplating, hydrophilic, antistatic and other properties of such materials, as well as poor blending, filling, and bonding properties with other materials, which limit their application to a certain extent. To modify the existing polyolefin plastic varieties, so that the mechanical properties, thermal properties or other properties of this material with large output and wide application range can reach or exceed the performance indicator...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02C08F4/04
Inventor 刘芳贾志欣贾德民罗远芳
Owner SOUTH CHINA UNIV OF TECH