Date of Award
Bachelor of Science
Copolymers of styrene and B- pinene were synthesized at 30 degrees Celcius in methylene dichloride, carbon tetrachloride, and nitrobenzene. NMR analysis was used to determine the mole percent of styrene and B-pinene in the copolymer. These data were used to calculate monomer reactivity ratios in the three different solvents. It was also found that the styrene reactivity ratio increased when solvents with low dielectric constants were used. The B-pinene reactivity ratio also increased as the dielectric constant of the solvent increased. Pyrolysis and gas chromatography indicated that copolymerization may not have occurred in nitrobenzene and carbon tetrachloride if the mole percent styrene in the feed was 50% or less. However, solvent extraction with acetone on the 1:1 molar feed polymer synthesized in nitrobenzene indicated that copolymerization did occur.
Paik, George Yusun, "Cationic copolymerization of styrene and beta-pinene: the effect of solvent on monomer reactivity ratios" (1983). Honors Theses. 1893.