Date of Award
Master of Science in Chemistry (MSChem)
Charles Jody Neef
INVESTIGATION INTO THE ADDITION OF BENZOIC ACID AND STYRENE OXIDE & EFFECT OF PHOSPHONIUM SALTS FOR FLAME RETARDANCY IN POLYURETHANE FILMS
An Abstract of the Thesis by
The thesis will be divided into two sections. First, the synthesis of a 1,2-hydroxy ester was performed using styrene oxide and benzoic acid using several different catalysts and solvents. This project was chosen because there is a limited number of studies in literature and they did not report a systematic study. Various catalysts will be used in this study such as tetrabutylammonium bromide, tetrabutylammonium chloride, tetrabutylammonium fluoride, tetrabutylammonium iodide to determine the effects of the halide on the reaction. The solvents chosen for this research were toluene, isopropanol, butanol and THF to determine solvents effects. Samples were analyzed by Fourier-transform infrared (FT-IR) spectroscopy and Nuclear magnetic resonance (NMR) spectroscopy. FTIR was used to determine reaction completion and NMR was used to determine the ratio of the regioisomers.
The second part of the research is the study of the effects of novel phosphonium salts on flame retardancy. New flame resistant materials are required industrially to replace halogenated flame retardants since these compounds have a negative environmental impact. In this study, phosphonium salts and triphenyl phosphate were incorporated into polyurethane films. FT-IR was used to characterize the polymer. Polyurethane films containing phosphonium salts and triphenyl phosphate were characterized by a burn test and thermogravimetric analysis (TGA) to determine their effect on flame retardancy and thermal stability.
Mahbub, Salehin, "INVESTIGATION INTO THE ADDITION OF BENZOIC ACID AND STYRENE OXIDE & EFFECT OF PHOSPHONIUM SALTS FOR FLAME RETARDANCY IN POLYURETHANE FILMS" (2020). Electronic Thesis Collection. 347.