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Thermal synthesis process for preparing grafted polyvinyl-maleic anhydride copolymer in solvent

A technology of grafting copolymer and maleic anhydride, applied in the field of polymer science, can solve the problems of difficult mass production, affecting processability, low grafting rate, etc. The effect of high branch rate

Inactive Publication Date: 2003-01-22
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Melt grafting is easy for continuous production and the process is simple, but the grafting rate is low, and the cross-linking side reaction occurs more seriously, which affects the processability; the grafting rate of solution grafting is higher, but the amount of waste liquid is large, and it is not easy to Large-scale production; the solid-phase grafting process is simple, but the grafting rate is not high, and it is only suitable for powdery polymers; both radiation and plasma require a light source, and the equipment is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Put 50ml of xylene in the autoclave, add 10g of PE resin, 0.6g of maleic anhydride, and 150mg of BPO, tighten the lid of the autoclave and place it in an oven at 160°C for 8 hours, then cool it with water, open the autoclave, and dissolve the solution Pour in the acetone of 300ml, stir (rotating speed 200 revs / min) on magnetic stirrer 1 hour, to remove unreacted substance, then suction filtration, the powder that suction filtration obtains is dried 12 hours in 80 ℃ of vacuum ovens, That is, a PE-g-MAH graft copolymer with a graft ratio of 2.2%wt was obtained. Embodiment 2: the preparation of PE-g-MAH graft copolymer

Embodiment 2

[0014] Put 50ml of xylene in the autoclave, add 8g of PE resin, 2g of maleic anhydride, 120mg of DCP and 0.5g of acrylamide, tighten the lid of the autoclave and place it in an oven at 180°C for 10 hours, then cool it with water and turn on the high pressure kettle, pour the solution into 300ml of acetone, stir on a magnetic stirrer (rotating speed 200 rpm) for 1 hour to remove unreacted substances, then suction filter, and put the powder obtained by suction filtration in a vacuum oven at 80°C After drying for 12 hours, a PE-g-MAH graft copolymer with a graft ratio of 2.7%wt was obtained. Embodiment 3: the preparation of PE-g-MAH graft copolymer

Embodiment 3

[0015] Put 50ml of decahydronaphthalene in the autoclave, add 5g of PE resin, 1.5g of maleic anhydride, 150mg of DCP and 1ml of xylene, tighten the lid of the autoclave and put it in an oven at 180°C for 10 hours, then cool it with water, Open the autoclave, pour the solution into 300ml of acetone, stir on a magnetic stirrer (rotating at 200 rpm) for 1 hour, to remove unreacted substances, then suction filter, and vacuum the powder obtained by suction filtration at 80°C Dry in an oven for 12 hours to obtain a PE-g-MAH graft copolymer with a graft ratio of 3.1%wt. Embodiment 4: the preparation of ABS-maleic anhydride graft copolymer

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Abstract

The present invention provides a thermal synthesis process for preparing grafted polyvinyl-maleic anhydride copolymer in solvent. It features that inside one high pressure reactor, polyethylene resin, maleic anhydride, dispersant, initiator and conjugated monomer are dissolved in solvent and reacted at certain temperature for certain period, and the product is then washed and dried to obtain grafted polyvinyl-maleic anhydride copolyer. The copolymer may be used as adhesive for composite polyethylene and metal pipe or plate; compatibilizer for polymer alloy to raise its compatibility and compatizier for polyethylene and inorganic communication material to raise the tensile strength without change in compact toughness. The process is simple, high in grafting rate and suitable for large-scale production.

Description

Technical field: [0001] The invention relates to a method for preparing polyethylene (PE)-maleic anhydride graft copolymer (PE-g-MAH), in particular to a method for preparing functionalized polyethylene by solvothermal synthesis in an autoclave new method. This invention is in the field of polymer science. Background technique: [0002] Polyethylene is a general-purpose plastic with a wide range of uses. It is widely used in various plastic products because of its low molecular polarity, high crystallinity, low price, and convenient processing. However, non-polar polyethylene has low adhesion to other materials, poor compatibility with polar polymers, and low heat resistance, which limits its application range. In order to expand its application range and improve the performance of original materials, functionalized polyethylene can be prepared by grafting polyethylene with other polar monomers. These polar monomers mainly include: maleic anhydride (MAH), dibutyl maleate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02
Inventor 戚嵘嵘金星陈哲峰周持兴
Owner SHANGHAI JIAO TONG UNIV
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