Remodelable phenolic resin and its composites based on dynamic boronic ester bonds

doi:10.19936/j.cnki.2096-8000.20241228.005

Abstract

Abstract: A novel boron-containing phenolic resin (BNR) with a phenylboronic acid structure as side groups was successfully synthesized using a hydrothermal method to address the issue of none remouldability in traditional phenolic resin-based composites. The BNR resin demonstrated a high yield of 94.1% and could be efficiently prepared. Upon heating at 160 ℃, the BNR resin underwent curing without any curing agents, forming a boronic ester cross-linked phenolic resin with reshaping ability. The cured resin exhibited remarkable thermal stability, with a carbon yield of 66%, making it suitable as a flame-retardant composite matrix. Furthermore, compared to traditional phenolic resins, the phenolic resin with boronic ester cross-linkages displayed complete stress relaxation under heat and imparted excellent remouldability to the composites. These findings highlight the potential of the BNR resin as a promising candidate for the development of advanced and versatile ablative composites.

Key words: phenolic resin, boronic ester, remouldability, ablative composite

CLC Number:

TB332

XING Xiaolong, HUANG Jinxin, ZHANG Jian, LIU Yi, RUAN Yingbo, ZHANG Chengshuang. Remodelable phenolic resin and its composites based on dynamic boronic ester bonds[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(12): 34-42.

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