A kind of preparation method of heat-resistant polyphenylene sulfide
A technology of polyphenylene sulfide and heat resistance, which is applied in the field of material preparation and can solve the problems of poor heat resistance of polyphenylene sulfide and the like
Active Publication Date: 2021-07-30
NORTHWEST NORMAL UNIVERSITY
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Problems solved by technology
However, polyphenylene sulfide with these structures has poor heat resistance, which limits its application
Method used
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[0013] The preparation, morphology, and the like of a hollow spherical polyphenylene sulfide of the present invention will be further described below by specific examples.
[0014] (1) Preparation of anhydrous sodium sulfide: 1.79.5 g of sodium sodium sulfide of nine hydride, added to 180 ml of N-dimethylpyrrolidone, continuously accessing nitrogen isolation oxygen protection (nitrogen flow rate at 10 mL / min), 150 ~ 160 ° C Reaction 1 h, gave green anhydrous sodium sulfide solution, poured into the reactor after cooling;
[0015] (2) Preparation of Combined Catalyst: Weigh 5.933 g of no water-free lithium chloride, 1.658 g of water potassium carbonate, 1.732 g sodium anhydrous sodium carbonate, mix well, to prevent oxidation and iohed;
[0016] (3) Preparation of hollow ball polyphenylene sulfide: The combined catalyst is dissolved in 230 ml N-dimethylpyrrolidone, and hydrogen is added to the reactor, at room temperature, stirring (40 r / min). Sodium oxide is adjusted to basic ...
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Abstract
The invention provides a method for preparing hollow spherical heat-resistant polyphenylene sulfide. First, sodium sulfide nonahydrate is subjected to high-temperature oxygen barrier treatment to obtain anhydrous sodium sulfide, and then potassium carbonate, sodium carbonate and lithium chloride are used as a combined catalyst , mix with the anhydrous sodium sulfide solution prepared above, adjust the solution to pH=9~10 with sodium hydroxide, then raise the temperature to 220~225°C under nitrogen protection, and react at constant temperature for 6~8 h; wash, filter, and dry , to obtain hollow spherical polyphenylene sulfide. After testing, the melting point of hollow spherical polyphenylene sulfide is 297°C, which has good heat resistance. Moreover, this polyphenylene sulfide has a larger specific surface area and is more compatible with other substances, so Various groups (inorganic macromolecules / metal oxides, etc.) can be easily introduced into the shell, so as to prepare various group-modified polyphenylene sulfide composite materials.
Description
Technical field [0001] The present invention relates to a method of preparing polyphenylene sulfide, and more particularly to a method of preparing a heat-resistant polyphenylene sulfide of a hollow spherical structure, which belongs to the field of material preparation. Background technique [0002] Polyphenylene Sulfide, Abnormal PPS) is a polymer containing the repeating structural unit of phenylene thione ether, which is a new type of functional engineering plastic, widely used in electronics, automotive, machinery and chemical fields. . PPS has the advantages of high mechanical strength, high temperature resistance, high flame retardation, chemical resistant performance; high crystallinity, high refueling, thermal stability, high mechanical strength, excellent electrical performance, and so on. Polyphenylene sulfide is also a two-story substance, which can be seen in the structure of its benzene ring and sulfur atoms, it can be seen that its rigidity is very strong, substant...
Claims
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IPC IPC(8): C08G75/0254C08G75/0209C08J9/28C08L81/02
CPCC08G75/0209C08G75/0254C08J9/28C08J2201/0502C08J2381/02
Inventor 郭瑞斌欧阳美璇莫尊理刘妮娟董奇兵陈颖
Owner NORTHWEST NORMAL UNIVERSITY