Summary
An approach to synthesis of hyperbranched phenol-formaldehyde resins involving alternating polycondensation is described. Three generations of hyperbranched novolaks were synthesized and characterized. They are enriched in o-p’methylene bridges and therefore well distinguished from normal novolaks by thermogravimetry, IR and NMR spectroscopy measurements.
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Maciejewski, M., Kedzierski, M. & Bednarek, E. Hyperbranched phenol-formaldehyde resins. Polymer Bulletin 38, 613–620 (1997). https://doi.org/10.1007/s002890050096
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DOI: https://doi.org/10.1007/s002890050096