Browsing by Author "Dimitrov R."
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Item STUDY OF ADHESION-COHESION INTERACTIONS BETWEEN POLYMERS IN ADHESIVE COMPOSITIONS ÉTUDE DES INTERACTIONS D’ADHÉSION ET D’COHÉSION ENTRE LES POLYMÈRES DANS LES COMPOSITIONS ADHÉSIVES STUDIUL INTERACȚIUNILOR DE ADERENȚĂ-COEZIUNE DINTRE POLIMERI ÎN COMPOZIȚIILE ADEZIVE(2023-01-01) Zheleva D.; Dimitrov R.The results of the research prove that adhesives based on chloroprene rubber can be obtained not only in combination with phenol-formaldehyde resins, but also with other polymers. Selected chlorobutyl rubber (CIIR) and high styrene rubber (KER) proved to be substitutes for phenolic resins, which were used to obtain adhesive compositions with good properties. Despite the existing opinion on the same polarity of the components of the adhesive composition, guaranteeing the most favorable properties, it was shown that compositions with different polarity have all the parameters of quality adhesives. Components with different polarity also show the effect of mutual reinforcement, which determines the alignment, orientation ability of macromolecular chains and occurrence of cohesion and adhesion interactions. The observed textures obtained after mechanical impact proved this claim. Adhesives with more developed textures have better adhesive properties. The selected research methods successfully predict the properties of the components and facilitate their selection and amount.Item STUDY OF ADHESION-COHESION INTERACTIONS BETWEEN POLYMERS IN ADHESIVE COMPOSITIONS ÉTUDE DES INTERACTIONS D’ADHÉSION ET D’COHÉSION ENTRE LES POLYMÈRES DANS LES COMPOSITIONS ADHÉSIVES STUDIUL INTERACȚIUNILOR DE ADERENȚĂ-COEZIUNE DINTRE POLIMERI ÎN COMPOZIȚIILE ADEZIVE(2023-01-01) Zheleva D.; Dimitrov R.The results of the research prove that adhesives based on chloroprene rubber can be obtained not only in combination with phenol-formaldehyde resins, but also with other polymers. Selected chlorobutyl rubber (CIIR) and high styrene rubber (KER) proved to be substitutes for phenolic resins, which were used to obtain adhesive compositions with good properties. Despite the existing opinion on the same polarity of the components of the adhesive composition, guaranteeing the most favorable properties, it was shown that compositions with different polarity have all the parameters of quality adhesives. Components with different polarity also show the effect of mutual reinforcement, which determines the alignment, orientation ability of macromolecular chains and occurrence of cohesion and adhesion interactions. The observed textures obtained after mechanical impact proved this claim. Adhesives with more developed textures have better adhesive properties. The selected research methods successfully predict the properties of the components and facilitate their selection and amount.