Suspension polymerization preparation method of polystyrene/silica hydrated particle

Abstract

The invention discloses a suspension polymerization preparation method of a polystyrene / silica hydrated particle, and the method comprises the following steps: (1) surface modification of the silica hydrated: weighing a certain mass of silica hydrated to disperse in ethanol, adding a silane coupling agent for modification, processing the resulting solution by using stearic acid, and then separating the processed solution to put aside for standby use; and (2) synthesis of the polystyrene / silica hydrated particle, 1, dissolving a dispersant, 2, uniformly mixing the modified silica hydrated and styrene monomers, and subjecting the resulting mixture to ultrasonic dispersion; and 3, pouring an evocating agent into a dispersed styrene / silica hydrated suspension to mix uniformly, fast mixing the resulting mixture and the dispersant, and cooling and discharging after complete reaction polymerization to obtain the polystyrene / silica hydrated particle. By adopting the suspension polymerization preparation method provided by the invention, the inorganic mineral material of silica hydrated is compounded to the framework of the macromolecular styrene to improve the strength of the polystyrene particle.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for preparing polystyrene / white carbon black particles by using styrene and white carbon black as raw materials. Background technique [0002] Polystyrene (PS) is a thermoplastic resin. Because of its low price and easy processing and molding, it is often used as the base material of functional materials such as ion exchange resins. At present, there are various methods for preparing PS microspheres. K. Lafferduri, R. Dot et al. contact polystyrene with carbon black and expandable microspheres to form a composition, and expand the microspheres to make the composition Prepare polystyrene white balls (200880100364.X) by foaming. Zhou Leiji Chen Road by adding an organic solvent to the stabilizer, adding styrene to the initiator, mixing the two and then reacting, and adding a hot solution composed of the initiator and styrene at least once during the ...

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Problems solved by technology

And in the preparation process, PS will be co-heated with concentrated sulfuric acid. Since PS itself is brittle and easily broken, and has poor heat resistance, the ion exchange resin prepared by using PS as the matrix has the disadvantage of being easily broken.

During the use of the ion exchange resin prepared by using PS as white balls, due to the brittleness of PS, it is prone to stress cracking, easy to break and pulverize, and block the equipment pipeline, which will have a certain impact on the use process.

In the existing reported method of preparing PS by compounding styrene and inorganic substances, researchers have compounded inorganic substances into PS, but due to the different process methods, the utilization rate of minerals is not high, and some minerals cannot be synthesized during the preparation process. Compounded into PS white balls, it does not fully and effectively improve the strength performance of polymer inorganic composite materials

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