Authors: O.I. Volkova, N.A. Zolotukhina

Title of the article: The selection of emulsifier and blowing agent to obtain a porous copolymer

Year: 2019, Issue: 2, Pages: 72-76

Branch of knowledge: 05.17.04 Technology of organic substances

Index UDK: 541.64

DOI: 10.26730/1999-4125-2019-2-72-76

Abstract: Obtaining a porous copolymer is a promising development in expanding the application of ion exchange. Macroporous ionites based on a porous copolymer have good kinetic characteristics, ion-exchange capacity and specific volume, compared with gel [1]. The aim of this work is to obtain porous polymer matrices with a specific volume of more than 4.5 cm³/g, with the copolymerization of styrene and divinylbenzene (DVB) in the presence of various blowing agents and emulsifiers. The article describes a method for obtaining copolymers using different types of emulsifiers and blowing agents (with different content of substances). On the basis of experimental data, the optimal concentrations of emulsifiers and blowing agents were identified, the temperature regime was established and the results of the specific volume of copolymers were presented. It is established that the emulsifier culminal allows the pellets to stick together during the process due to the tight enveloping individual granules. When using the emulsifiers of polyvinylbutyral (PVA) and starch, in some cases, the obtained copolymer with a specific amount less than the specified or stick together in one big granule. The optimum amount of blowing agent was 80% of the total matrix. When the amount of less than 80% copolymer is strong, but not porous, and with a high content there are many pores, the walls of the matrix matrix of the copolymer are thinned.

Key words: porous copolymer blowing agent emulsifier

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