Abstract
We have synthesized five dipropargylic compounds containing electron donor and acceptor substituents between the two phenyl groups. Based on physicochemical data obtained it is shown that heat-induced polymerization depends on the nature of the substituent. Thus, reaction kinetics are modified while molten state mechanisms involved remain identical (principal reaction: intramolecular ring formation; secondary reaction: formation of phenolic entities). The physicochemical techniques used to obtain these results were Fourier transform infrared spectroscopy (FT-IR) and 1H and 13C nuclear magnetic resonance (NMR) spectroscopy, correlated with chromatographic separation.
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