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Surface solid phase graft modified PVDF (Polyvinylidene Fluoride) and preparation method thereof

A technology for modifying and grafting monomers, which is applied in the field of surface solid-phase grafting modified PVDF and its preparation, can solve problems such as environmental pollution, and achieve the effects of solvent-free recovery, low reaction temperature, and expansion of application fields.

Active Publication Date: 2012-07-25
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] One of the purposes of the present invention is to provide a kind of preparation method of modified PVDF (polyvinylidene fluoride) that can be used for a long time, is not easy to pollute, and grafting efficiency is high for the environmental pollution problem that existing PVDF modification method exists, is Preparation of functional polymers grafted on the surface of PVDF by surface solid-phase grafting

Method used

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  • Surface solid phase graft modified PVDF (Polyvinylidene Fluoride) and preparation method thereof
  • Surface solid phase graft modified PVDF (Polyvinylidene Fluoride) and preparation method thereof
  • Surface solid phase graft modified PVDF (Polyvinylidene Fluoride) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Weigh 100 parts of PVDF 6008 powder in 1mol / L KOH solution, boil for 1h, cool at room temperature, wash until neutral, and dry at 50°C.

[0037] (2) 100 parts of PVDF powder obtained by step (1) and 10 parts of glycidyl methacrylate are placed in a reactor with a stirring device, and 10 parts of hot dimethylformamide and 20 parts of Acetone, pre-mixed at 100°C for 60 minutes, after the pre-mixing time is over, use a vacuum pump to remove the acetone.

[0038] (3) Under the protection of nitrogen, the temperature was raised to 120°C, and 2 parts of benzoyl peroxide were added to the reaction kettle with a stirring device, and the stirring was stopped after 40 minutes. The product was washed with acetone and then dried in a vacuum oven.

Embodiment 2

[0040] (1) Weigh 100 parts of PVDF 6008 powder in 3mol / L KOH solution, boil for 2 hours, cool at room temperature, wash until neutral, and dry at 50°C.

[0041] (2) 100 parts of PVDF powder obtained by processing step (1) and 5 parts of glycidyl methacrylate and 5 parts of maleic anhydride are placed in a reactor with a stirring device, and the added hot dimethylformamide and 20 parts of acetone, premixed at 120°C for 50 minutes, and after the premixing time was over, the acetone was extracted with a vacuum pump.

[0042] (3) Under the protection of nitrogen, heat up to 120°C, add 2 parts of benzoyl peroxide into the reaction kettle with a stirring device, stop stirring after 60min, and put the product in a vacuum drying oven to dry after being washed with acetone.

Embodiment 3

[0044](1) Weigh 100 parts of PVDF 6008 powder in 1mol / L NaOH solution, boil for 2 hours, cool at room temperature, wash until neutral, and dry at 60°C.

[0045] (2) 100 parts of PVDF powders and 10 parts of maleic anhydride obtained by step (1) are placed in the reactor with stirring device, add 20 parts of hot dimethylformamide and 40 parts of acetone, Pre-mix at 80°C for 50 minutes. After the pre-mixing time is over, use a vacuum pump to remove the acetone.

[0046] (3) Under the protection of nitrogen, heat up to 120°C, add 2 parts of lauryl peroxide into the reaction kettle with a stirring device, stop stirring after 60 minutes, wash the product with acetone and put it in a vacuum drying oven to dry.

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Abstract

The invention relates to a preparation method of a surface solid phase graft modified PVDF (Polyvinylidene Fluoride). The preparation method comprises the following steps of: performing strong alkali treatment on PVDF; mixing with graft monomer and a bonding agent; and adding an initiator under the protection of nitrogen to react to prepare the surface solid phase graft modified PVDF. The surface solid phase graft modified PVDF is prepared by the method. The PVDF modification method has the characteristics of low reaction temperature, short reaction time, no solvent recovery, low pollution and high grafting efficiency.

Description

technical field [0001] The invention relates to a surface solid phase grafting modified PVDF and a preparation method thereof. Background technique [0002] PVDF (polyvinylidene fluoride) is a new type of material with excellent performance. The long-term use temperature is -40°C to 150°C. The processing temperature range is wide, and it can still maintain good strength under certain temperature and pressure. At the same time, because PVDF has excellent anti-ultraviolet and weather aging resistance, it will not crack after being placed outdoors for more than ten years. Therefore, PVDF has an extremely wide range of applications. For example, PVDF resin can be made into integral or lined corrosion-resistant valves, corrosion pumps, pipes, pipe fittings, storage tanks and heat exchangers. Fabrics can be used as filter cloths, so in some airports, chemical industry Places such as factories and sports fields can use PVDF coatings for a long time. [0003] However, the extremel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F259/08
Inventor 陶国良夏艳平章锋戴宏程纪波印
Owner CHANGZHOU UNIV
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