Preparation and characterization of polybenzoxazine involving various additives

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2021-1-12

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Hisar Telli, Ayşegül

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Polybenzoxazines, a class of phenolic offering excellent mechanical and physical properties, have been developed to overcome the shortcomings of the traditional phenolic resins. The features of these polymers such as no requirement for harsh catalysts, releasing no by-product, molecular design flexibility and low melt viscosity make this class of polymers a promising candidate for various industrial and academic applications. Several methods such as preparation of alloys with other high performance polymers, designing of novel monomers and incorporation of additive compounds were employed to improve the performance of polybenzoxazines. In this work, polybenzoxazine composites involving various types of additives namely aromatic diboronic acid, boric acid, clay, zirconium diboride and diglycidyl ether bisphenol-A epoxy resin were prepared to improve thermal properties. In the first part, phenol and aniline based benzoxazine monomer, in the second part, difunctional benzoxazine monomer were synthesized and their composites were prepared. The structural and thermal characteristics of the benzoxazine monomers, polybenzoxazines and polybenzoxazine composites were analyzed by NMR, FTIR, vi DSC, TGA, XRD, DMA and DP-MS techniques. Improvement in the thermal characteristics were recorded by the incorporation of additives of the benzoxazine monomers.

Subject Keywords

Polybenzoxazine, Thermal Properties, Direct Pyrolysis Mass Spectrometry, Aromatic diboronic acid, Boric acid, Clay, Zirconium diboride, Epoxy

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https://hdl.handle.net/11511/89797

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. Hisar Telli, “Preparation and characterization of polybenzoxazine involving various additives,” Ph.D. - Doctoral Program, Middle East Technical University, 2021.