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Further analysis by pyrolysis--gas chromatography--mass spectrometry showed that merbau wood liquid extract was dominated by resorcinol compounds, especially 1,3-benzenediol.
After copolymerization, the band peaks indicated phenolic polymer derivatives dominated by 1,3-benzenediol,4,5-dimethylresorcinol with 24.
Based on qualitative analysis using UV-vis spectroscopy, FTIR spectroscopy, and Py-GCMS and physical analysis using DTA, XRD, and IV-meter intrinsic viscosity, merbau wood waste liquid extract is predominantly 1,3-benzenediol resorcin, or resorcinol.