Di̇etanolami̇n Yan Grup İhti̇va Eden Meti̇l Metakri̇lat Kopoli̇meri̇ni̇n Termodi̇nami̇k Özelli̇kleri̇ni̇n İncelenmesi̇

Abstract

ÖZBu çalışmada, P(DEAMSt0.19-ko-MMA)"polimerinin,(polimer-prob) sistemine ait bazı fiziksel ve termodinamik özellikleri ters gaz kromatoğrafisi metoduyla incelendi. Bu amaçla, kopolimer kromosorb-W destek katısı üzerine kaplanarak çelik kolon içine dolduruldu. Çalışmada prob olarak fiziklsel ve kimyasal özellikleri farklı olan bir seri alkol ve alkanlar kullanıldı. 333-473 K aralığında her 10 º C"de bir enjeksiyon yapılarak probların kopolimer üzerindeki spesifik alıkonma süreleri bulundu. Bu sürelerden spesifik alıkonma hacimleri hesaplandı. INVESTIGATION OF THERMODYNAMIC PROPERTIES OF METHYL METHACRYLATE COPOLYMER CONTAINING DIETHANOLAMINE SIDE GROUP ABSTRACTIn this study, some physical and thermodynamic properties of the (polymer-probe) system of P(DEAMSt0.19-co-MMA) polymer were investigated by Inverse gas chromatographic method. For this purpose, the copolymer was coated on the support matrix of Chromosorb-W and filled into a steel column. In this study, a series of alcohols and alkanes with different physical and chemical properties were used as probes. The probes had specific retention times on the copolymer by performing an injection of 10 o C at 333-473 K. The specific retention volumes have been calculated over this period. The glass transition temperature (Tg) of the copolymer from lnVg 0 ;1/T graph was determined to be 110 °C. The heats of the adsorption of the probes on the copolymer were calculated at temperatures below the glass transition temperature. The adsorption heats of the alcohols were higher than those of the alkanes. The values of G1  , partial molar free energy G1  and partial molar temperature H1  were found. These values corresponded to the values found for (polymer-nonsolvent) systems. In addition, the solubility parameters of the copolymer were calculated using the parameter values of the Flory-Huggins interaction. The solubility parameter of the copolymer was found to decrease with temperature. It was determined that the probs was not a solvent for the copolymer under the glass transition temperature.