Synthesis and characterization of the copolymer of dodecyl methacrylate/styrene containing an amidine functional group

摘要

A copolymer of dodecyl methacrylate/styrene (DMA/St) containing the amidine functionality was synthesized and characterized. The one-step solution copolymerization process was carried out using a mixed solvent, high temperature, and a functional azo initiator, 2,2'-azobis[N,N'-dimethylene isobutyramidme]. Copolymers with different compositions (DMA/St 10/1 to 1/2), molecular weight (M-n 2000-9000), and functionality (1.0-2.0) were prepared and characterized by NMR, FTIR, DSC, and elemental analysis. The molecular weight of the copolymers could be controlled by the amount of the initiators. Co-polymer composition depends oil the feed molar ratio of comonomers. The amidine functionality of the copolymers was determined by elemental analysis. It was found that 72%. of the polymer chain has one functionality. The T-g of the copolymer depends on the feed molar ratio, This copolymer could be used as a potential dispersant for lubricant oil. (C) 2002 Wiley Periodicals Inc. [References: 48]