Abstract
AbstractThe infrared spectra of several alcohols and aminoalcohols were measured in bulk and in dilute solution in the 2800–4000 cm.−1 region to determine the nature of hydrogen bonding in these compounds. An epoxy resin was cured with both an aliphatic monoamine and a diamine, and the OH‐stretching bands of the polymers were studied in the temperature range 30–200°C. It is concluded that the hydroxyl groups in the polymers are extensively involved in long‐range hydrogen bonding, particularly of the OHN type, at room temperature. The shift in the bonded OH band to lower frequency with increasing temperature is attributed to a shift from long range to short range bonds. Even at 200°C. there are relatively few free hydroxyl groups in these polymers.
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