Abstract
The oleic acid polyester macromer was synthesized from 40 parts of oleic acid, 34 parts of phthalic anhydride and 26 parts of glycerol. It might be copolymerized with MMA in toluene solution using a free radical initiator. The ratio between the macromer and MMA monomer was varied and the effect on the copolymers properties such as the glass transition temperature, molecular weight, thermal stability and film properties were studied. H-NMR spectroscopy was used to provide evidence of the reaction between the macromer and MMA during the copolymerization. Increasing the amount of macromer led to a decrease in the polymerization rate. On the other hand, increasing the amount of MMA leads to increasing molecular weight and higher Tg value. The coating obtained with the highest ratio of MMA exhibited the best overall physico-chemical properties. Results further reveal that the alkali and water resistance improved significantly with the increase in MMA content in the copolymer.
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