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Preparation and properties of cardanol‐based polybenzoxazine/SiO 2 hybrids by sol‐gel technique
Author(s) -
Li Shengfang,
Zou Tao,
Feng Li,
Liu Xianli,
Tao Min
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.38607
Subject(s) - cardanol , thermal stability , materials science , monomer , chemical engineering , yield (engineering) , polymer chemistry , wetting , nuclear chemistry , polymer , composite material , chemistry , epoxy , engineering
A new cardanol‐based benzoxazine monomer containing a hydroxyl group (CBZ) was synthesized and characterized by FT‐IR and 1 H NMR spectroscopy. The formation mechanism of cardanol‐based polybenzoxazine/SiO 2 hybrids from CBZ and tetraethoxysilane (TEOS) by sol‐gel technique was invested by FT‐IR analysis. FT‐IR and SEM confirmed that there were many SiO 2 particles formed and embedded in the cardanol‐based polybenzoxazine. A phase separation occurred when the ratio (wt) of TEOS to CBZ was not less than 3 : 5. TGA results illuminated the thermal stability and char yield of cardanol‐based polybenzoxazine could be enhanced due to the formation of SiO 2 particles in the polybenzoxazine matrix. Incorporation of SiO 2 could improve the surface de‐wetting and anti‐ultraviolet properties of the films. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013