Ethylene-vinyl acetate copolymer-polystyrene resin and preparation method thereof

A technology of ethylene vinyl acetate copolymer and ethylene vinyl acetate, which is applied in the field of ethylene vinyl acetate copolymer-polystyrene resin and its preparation method, can solve problems such as side reactions such as cross-linking, gel phenomenon, etc., and achieve impact Improved properties, improved high and low temperature resistance, and good grafting effect

Inactive Publication Date: 2012-07-04
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of small molecule initiators, this method is prone to side re

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1: In an air atmosphere, an ethylene vinyl acetate copolymer with a vinyl acetate mass percentage of 15% was pre-irradiated with β rays on an electron accelerator device, and the irradiation dose was 5 kGy.

[0018] The pre-irradiated ethylene vinyl acetate copolymer is 5 parts by mass, 8 parts by mass of styrene, 100 parts by mass of deionized water, 0.1 part by mass of sodium dodecylbenzene sulfonate, and 0.1 part by mass of calcium hydroxyphosphate. Parts, 0.01 part of ferrous sulfate, add it to the reactor equipped with a stirrer, thermometer, reflux condenser, nitrogen introduction tube and heating device, pour in nitrogen, heat and stir, raise the temperature of the reactor to 60°C to make the temperature constant After reacting for 6 hours, the reaction is terminated, and the reaction product is filtered, washed, and dried to obtain an ethylene vinyl acetate copolymer-polystyrene resin with a grafting rate of 50.2% by mass.

[0019] The mass percentage of graf...

Example Embodiment

[0032] Example 2: In an air atmosphere, ethylene vinyl acetate copolymer with 28% vinyl acetate mass percentage was pre-irradiated with β rays on the electron accelerator device, and the irradiation dose was 60 kGy.

[0033] The above-mentioned pre-irradiated ethylene vinyl acetate copolymer 25 parts by mass, 20 parts by mass of styrene, 200 parts by mass of deionized water, 1 part by mass of sodium dodecylbenzene sulfonate, and 1 part by mass of calcium hydroxyphosphate Part, 0.1 part by mass of ferrous sulfate, add it to a reactor equipped with a stirrer, a thermometer, a reflux condenser, a nitrogen introduction tube and a heating device, and pass nitrogen into it, heat and stir. The temperature of the reactor was raised to 90°C, the temperature was kept constant, and the reaction was conducted for 10 hours to complete the reaction. The reaction product was filtered, washed, and dried to obtain an ethylene vinyl acetate copolymer-polystyrene resin.

[0034] The grafting rate of ...

Example Embodiment

[0035] Example 3: In an air atmosphere, the mass percentage of vinyl acetate is 20% ethylene vinyl acetate copolymer. 60 Co was used as the irradiation source, and gamma rays were used for pre-irradiation, and the irradiation dose was 40kGy.

[0036] The above-mentioned pre-irradiated ethylene vinyl acetate copolymer 10 parts by mass, 12 parts by mass of styrene, 120 parts by mass of deionized water, 0.3 parts by mass of sodium dodecylbenzene sulfonate, and 0.6 parts by mass of calcium hydroxyphosphate Parts, 0.08 parts by mass of ferrous sulfate, add it to a reactor equipped with a stirrer, a thermometer, a reflux condenser, a nitrogen introduction tube and a heating device, pour in nitrogen, heat and stir, and raise the reactor temperature to 70°C to make The temperature is constant, the reaction is 7 hours, the reaction is finished, and the reaction product is filtered, washed, and dried to obtain an ethylene vinyl acetate copolymer-polystyrene resin.

[0037] The grafting rate ...

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Abstract

The invention discloses ethylene-vinyl acetate copolymer-polystyrene resin and a preparation method thereof. The method comprises the following steps of: pre-irradiating an ethylene-vinyl acetate copolymer with beta rays or gamma rays, adding the pre-irradiated ethylene-vinyl acetate copolymer, a functional monomer, a dispersant, an emulsifier, a nucleating agent and a homopolymerization inhibitor into a reactor, and undergoing a suspension graft polymerization reaction; and filtering a suspension grafting product, washing and drying to obtain the ethylene-vinyl acetate copolymer-polystyrene resin. The pre-irradiated ethylene-vinyl acetate copolymer is used for generating a large molecular peroxide for serving as an initiator, so that side reactions such as homopolymerization of a monomer caused by a small molecular initiator, crosslinking of the ethylene-vinyl acetate copolymer and the like are avoided; through the suspension graft polymerization reaction, the grafting rate mass percentage is up to 80.2 percent, and a good grafting effect is achieved; the grafting product has the technical properties of high strength, high flexibility and impact resistance; and the ethylene-vinyl acetate copolymer-polystyrene resin has the characteristics of an ethylene-vinyl acetate copolymer and polystyrene.

Description

technical field [0001] The invention relates to an ethylene vinyl acetate copolymer-polystyrene resin and a preparation method thereof. Background technique [0002] Both ethylene vinyl acetate copolymer and polystyrene are widely used polymer materials. Ethylene vinyl acetate copolymer is a thermoplastic polymer formed by high-pressure bulk polymerization of non-polar, crystalline ethylene monomer and highly polar, non-crystalline vinyl acetate monomer in the presence of an initiator. It is a highly branched High-strength random copolymer with good impact resistance and flexibility. As the content of vinyl acetate increases, crystallinity, hardness, rigidity and heat distortion temperature gradually decrease, while gloss, transparency, impact resistance, flexibility, stress crack resistance, solubility in solvents, heat shrinkage, etc. improved to varying degrees. [0003] Polystyrene is one of the general-purpose plastic varieties. It has a wide range of applications an...

Claims

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Application Information

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IPC IPC(8): C08F255/02C08F112/08C08F2/18
Inventor 李文斐姚占海袁悦李轩姚睿翔孟玥谢磊
Owner CHANGCHUN UNIV OF SCI & TECH
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