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Organic silicon grafted and modified polyphenylene sulphide material and preparation method thereof

A polyphenylene sulfide and modified material technology, which is applied in the field of organosilicon grafted polyphenylene sulfide modified material and its preparation, can solve the problems of increasing the rigidity of the polymer chain, limiting the scope of application, low molecular weight, etc. The effect of uniform grafting, simple operation and few reaction steps

Inactive Publication Date: 2012-06-20
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, PPS also has deficiencies: due to the low relative molecular weight of PPS, and the large number of benzene rings on the main chain of PPS increases the rigidity of the polymer chain, making it brittle and poor in impact toughness. limits its scope of application
So far, the research on polyphenylene sulfide grafted with silicone has not been reported

Method used

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  • Organic silicon grafted and modified polyphenylene sulphide material and preparation method thereof
  • Organic silicon grafted and modified polyphenylene sulphide material and preparation method thereof
  • Organic silicon grafted and modified polyphenylene sulphide material and preparation method thereof

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Effect test

Embodiment 1

[0024] (1) Under the protection of nitrogen, 20g of polyphenylene sulfide powder, 200ml of methylene chloride, 32.52g of anhydrous aluminum trichloride powder, 15ml of acetyl chloride, reacted in an ice-water bath for 1.5 hours, then heated up to 38°C, and reacted for 3.5 hours, cooled to room temperature, transferred all the reaction solution into glacial hydrochloric acid (50ml hydrochloric acid+50g ice) for decomposition, suction filtration, washing, and vacuum drying to obtain acetylated polyphenylene sulfide.

[0025] (2) Under nitrogen protection, 5.2g of acetylated polyphenylene sulfide powder, 100ml of toluene, 10ml of 3-aminopropyltriethoxysilane, 0.5ml of acetic acid, 2g of 4A molecular sieves were reacted at 80°C for 8 hours, Suction filtration, separation, Soxhlet extraction with ethanol solution for 24 hours, and vacuum drying to obtain polyphenylene sulfide powder modified by organosilicon grafting, with a grafting rate of 5.4%. The grafting rate is calculated by...

Embodiment 2

[0029] (1) Under nitrogen protection, 20g of polyphenylene sulfide powder, 200ml of methylene chloride, 16.26g of anhydrous aluminum trichloride powder, and 7.5ml of acetyl chloride were reacted in an ice-water bath for 1.5 hours, then heated to 38°C, and then After reacting for 3.5 hours, transfer all the reaction solution into glacial hydrochloric acid (50ml hydrochloric acid + 50g ice) for decomposition, suction filtration, washing, and vacuum drying to obtain acetylated polyphenylene sulfide.

[0030] (2) Under nitrogen protection, 5.2g of acetylated polyphenylene sulfide powder, 100ml of toluene, 10ml of 3-aminopropyltriethoxysilane, 0.5ml of acetic acid, 2g of 4A molecular sieves were reacted at 100°C for 2 hours, Suction filtration, separation, Soxhlet extraction with ethanol solution for 24 hours, and vacuum drying to obtain polyphenylene sulfide powder modified by organosilicon grafting, with a grafting rate of 3.4%.

Embodiment 3

[0032] In embodiment 1 (1), dichloromethane is changed into 1,2 dichloroethanes, and all the other are with embodiment 1.

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Abstract

The invention discloses a preparation method of organic silicon grafted and modified polyphenylene sulphide. The preparation method comprises the following steps of: reacting polyphenylene sulphide powder, acetylchloride and anhydrous AlC13 powder in methylene dichloride or ethylene dichloride to obtain acetylation polyphenylene sulphide modified powder; and then reacting acetylation modified polyphenylene sulphide, an organic silicon monomer containing amino, acetic acid and molecular sieve in anhydrous toluene or ethanol under the protection of nitrogen at 70-110 DEG C for 0.5-36 h so as toobtain the organic silicon modified polyphenylene sulphide. The organic silicon grafted and modified polyphenylene sulphide disclosed by the invention has the significant advantages of being cheap inraw material, few in reaction step, simple for operation and uniform for grafting; simultaneously, because an organic silicon oxygen chain has the characteristics of heat stability and flexibility, the improvement on toughness of polyphenylene sulphide makes the most sense and is also beneficial to being compatible with other reinforcing materials and increasing composite properties thereof; and the grafted and modified polyphenylene sulphide still can be widely applied to the high-temperature resistant fields, such as electronic and electrical, automobile, national defence military and the like.

Description

technical field [0001] The invention relates to a silicone-grafted polyphenylene sulfide modified material and a preparation method thereof. Background technique [0002] Polyphenylene sulfide, the full name of polyphenylene sulfide, is a macromolecular linear rigid structure formed by connecting benzene rings with sulfur atoms in the para position. It is a semi-crystalline thermoplastic special engineering plastics. It was first produced by Phillips Corporation Industrial production was realized in 1973. PPS has many excellent properties: good heat resistance, flame retardancy, high mechanical strength, good fatigue and wear resistance, strong corrosion resistance, good dimensional stability, excellent electrical properties and easy molding. Due to its excellent performance, PPS is widely used in the fields and industries of electronics, automobiles, precision machinery, chemicals, aviation, and aerospace. [0003] However, PPS also has deficiencies: due to the low relati...

Claims

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Application Information

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IPC IPC(8): C08G75/02C08G75/029
Inventor 周晓东狄鑫杰范传杰林群芳
Owner EAST CHINA UNIV OF SCI & TECH
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