Abstract
The study concerns composite materials based on polymer mixtures of a styrene-acrylic polymer, glycidyl ether, and a 3-aminopropyltriethoxysilane (APTES) compatibilizer. The use of a silane-type compatibilizer improves the compatibility of the components and has been shown to significantly increase the degree of crosslinking of the composition components. In this work, the structural parameters of the polymer network of the composition components depending on the compatibilizer concentration were researched by the method of equilibrium swelling. The optimal concentration of the compatibilizer was found to maximize the degree of crosslinking with a minimal number of active chains. This fact proves that the crosslinking in the composition is complete and the molecule does not contain active sites that have not reacted with the compatibilizer. The swelling kinetics of the polymer composite films proves that with an increase in the degree of crosslinking, the swelling of the polymer films decreases. Polymer films with a low proportion of active chains practically do not swell after the crosslinking process.The article describes a possible mechanism of compatibilization involving 3-aminopropyltriethoxysilane as well as styrene-acrylic and glycidyl ether polymers. The 3-aminopropyltriethoxysilane compatibilizer has active functional groups that are located on opposite sides of the molecule; these are three active hydroxyl groups and one active amino group. Due to the presence of various functional groups, this compatibilizer can bind the polymers and thereby form strong polymer films.This gives grounds to assert that the control of the compatibilizer concentration and the degree of crosslinking of the composition components provide prospects for the creation of polymer films with high physical and mechanical characteristics due to the high interfacial adhesion of the components in the composition
Highlights
When studying the properties of polymer composite materials, research to assess the impact of each component of a mixture on its structural features and deformation-strength characteristics is of paramount importance
A significant improvement in the interoperability of polymers can be achieved by selecting polymer pairs that would result in a strong intermolecular interaction between them
The aim of the study is to analyse the physical and mechanical characteristics of polymer films based on a mixture of polymers and a 3-aminopropyltriethoxysilane (APTES) compatibilizer
Summary
When studying the properties of polymer composite materials, research to assess the impact of each component of a mixture on its structural features and deformation-strength characteristics is of paramount importance. 6/6 ( 108 ) 2020 plained by the lack of compatibility of most polymer pairs due to the low entropy of their mixing and poor adhesion in the interfacial area The latter circumstance is one of the main causes of phase separation and deterioration of the physical and mechanical characteristics of composite materials. It is important to select methods for regulating the properties of mixtures of polymers using interfacial additives such as compatibilizers – graft copolymers containing active functional groups Such compounds are reactive and form strong bonds with polar polymers, and their use helps to get closer to the problem of improving the quality characteristics of immiscible components of the mixture and finished materials made of polymer compositions [3]. A thorough study can establish preconditions for formation of products with high physical and mechanical characteristics
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