Spectroscopic investigation of the one step synthesis of a model polyimide

TL;DRAbstract

The objective of this dissertation was to examine the factors affecting acylation and cyclization reactions during solution imidization primarily by spectroscopic techniques. The kinetics of a polyimide synthesized from 1,5-diaminonaphthalene (DAN) and 3,3$\\sp\\prime$,4,4$\\sp\\prime$-benzophenonetetracarboxylic dianhydride (BTDA) were studied by a variety of techniques in solution from 25$\\sp\\circ$C to 45$\\sp\\circ$C, 100$\\sp\\circ$C and 210$\\sp\\circ$C. UV-Visible spectra exhibited blue shifts upon reaction from the diamine to the polyimide. Compositional analysis of the UV-Vis spectra by deconvolution revealed possible intermediates present during the reaction at low temperatures. At higher temperatures such as 100$\\sp\\circ$C and 210$\\sp\\circ$C, evidence of three intermediates such as diamic acid, amic acid-imide, and diimide were present. The reaction solvent m-cresol was found to form a complex with the diamine, leading to an equilibrium which was revealed by fluorescenc

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