A Simple Approach to Distinguish Classic and Formaldehyde-Free Tannin Based Rigid Foams by ATR FT-IR

<div>ATR FT-IR spectra of polyfurfuryl alcohol (red dot) tannin-formaldehyde polymer (green dots) and classic tannin based rigid foam (dark blue).</div>

Journal of Spectroscopy

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Figure 1

Figure 1: A Simple Approach to Distinguish Classic and Formaldehyde-Free Tannin Based Rigid Foams by ATR FT-IR 