NDLI: New benzoxazines containing polyhedral oligomeric silsesquioxane from eugenol, guaiacol and vanillin

Content Provider	Royal Society of Chemistry (RSC)
Author	Periyasamy, Thirukumaran Muthusamy, Sarojadevi Asrafali, Shakila Parveen
Copyright Year	2015
Abstract	Polybenzoxazine–tethered polyhedral oligomeric silsesquioxane nanocomposites with well-defined architectures were prepared by the reaction of bio-phenols: eugenol, guaiacol, vanillin with POSS-octaamine and paraformaldehyde. FT-IR measurements evidenced the occurrence of a Mannich reaction between phenolic groups of bio-phenols and amino groups of POSS molecules, with the consequent formation of a heterocyclic benzoxazine ring binding POSS in its backbone. Their chemical structures were confirmed using 1H and 13C-NMR analysis. The thermo-mechanical properties and thermal stability of the POSS–polybenzoxazine hybrid networks were determined using DSC, DMA and TGA. SEM, EDX, AFM and TEM micrographs show that POSS–Pbz nanocomposites exhibit featureless morphologies with no discernible phase separation, suggesting that the POSS nanoparticles are dispersed homogeneously throughout the matrix. The homogeneity of these networks with octafunctional POSS is also indicated by their moduli in the range of 2.63 to 2.91 GPa. Moreover, their dielectric values [both dielectric constant (1.85) and dielectric loss (0.28)] and moisture absorption values are very low (<0.01%), which makes them suitable materials for use in microelectronics packaging.
Starting Page	1691
Ending Page	1702
Page Count	12
File Format	HTM / HTML PDF
ISSN	11440546
Volume Number	39
Issue Number	3
Journal	New Journal of Chemistry
DOI	10.1039/c4nj02047b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Paraformaldehyde Relative permittivity Fourier-transform infrared spectroscopy Microelectronics Dielectric Eugenol Composite material Guaiacol Transmission electron microscopy DSC Mannich reaction DMA POSS Vanillin Dimethylacetamide Heterocyclic compound
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Catalysis

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