|Sheng, Quan - EX-EMPLOYEE, NCAUR, USDA|
Submitted to: Proceedings of American Chemical Society National Meeting
Publication Type: Proceedings
Publication Acceptance Date: September 1, 1998
Publication Date: N/A
Technical Abstract: Copolymer of dodecyl methacrylate/styrene containing amidine functionality was synthesized and characterized. The one step solution copolymerization process was carried out using mixed solvent, higher temperature and functional azo initiator 2,2'- azobis-N,N'-dimethylene isobutyramidine]. Copolymers with different composition (DMA/St 10/1 to 1/2), molecular weight (Mn 2,000-9,000) and functionality (1.0-2.0) were prepared and characterized by NMR, FT-IR, SEC, DSC and elemental analysis. The molecular weight of copolymers could be controlled by amount of initiators. Copolymer composition depends on feed molar ratio of comonomers. Amidine functionality of copolymers was determined by elemental analysis. It shows 72% of the polymer chain has one functionality. Tg's of copolymer depends on the feed molar ratio. This copolymer could be used as a potential dispersant for lubricant oil.