Preparation and characterization of polybenzoxazine involving various additives

Hisar Telli, Ayşegül
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.


Effect of aromatic boronic acids on thermal characteristics of polybenzoxazine derivatives and composites
İpek, Halil; Hacaloğlu, Jale; Department of Polymer Science and Technology (2019)
Polybenzoxazines, a class of phenolics offering excellent mechanical and physical properties, have been developed to overcome the shortcomings of the traditional phenolic resins. These materials possess low water absorption, low melt viscosity, near-zero shrinkage upon curing and releasing no by-products. In addition, molecular design flexibility of benzoxazine monomers gives opportunity to adjust the properties of the polybenzoxazines according to the application area making them advantageous for various i...
Synthesis and characterization of metal functional polybenzoxazines /
Orhan Lekesiz, Tuğba; Hacaloğlu, Jale; Kayran, H. Ceyhan; Department of Chemistry (2014)
Polybenzoxazines possessing excellent mechanical and physical properties has been developed to overcome the shortcomings associated with the use of traditional phenolics. Various approaches for performance improvement of polybenzoxazine were examined. These approaches include alloying with other high performance polymers, hybridization with inorganics, and designing of novel monomers as well as high molecular weight polymeric precursors. In the first part of this work, benzoxazines based on phenol and anili...
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Preparation of block and graft copolymers of conducting polymers with insulating polymers with good mechanical properties have been attempted in order to improve their mechanical properties. Yet, complete structural characterization is still limited due to the insolubility of the polymer samples. In this work, direct insertion pyrolysis mass spectrometry technique had been applied for structural and thermal characterization of a polymer prepared by electrochemical polymerization of pyrrole on a poly(2-(N-py...
Synthesis and Characterization of Zirconium based Bulk Amorphous Alloys
Saltoğlu, İlkay; Akdeniz, Mahmut Vedat; Mehrabov, Amdulla (2005-09-28)
In recent years, bulk amorphous alloys and nanocrystalline materials have been synthesized in a number of ferrous and non-ferrous based alloys systems, which have gained some applications due to their unique physico-chemical and mechanical properties. In the last decade, Zr-based alloys with a wide supercooled liquid region and excellent glass forming ability have been discovered. These systems have promising application fields due to their mechanical properties; high tensile strength, high fracture toughne...
Synthesis and analysis of thermal characteristics of polybenzoxazine based on phenol and 3-Amino phenyl boronic acid
İPEK, HALİL; Hacaloğlu, Jale (2019-07-12)
In this work, 3-amino phenyl boronic acid (AB) was used as an aniline derivative in the preparation of polybenzoxazine based on phenol. In order to investigate the effect of boronic acid on thermal characteristics, polybenzoxazines based on pure aniline and 50% aniline and AB mixture were also prepared and analyzed. Significant improvements in thermal characteristics, increase in thermal stability and char yield, was recorded for the polymers based on AB or its mixture. This behavior was associated with cro...
Citation Formats
A. Hisar Telli, “Preparation and characterization of polybenzoxazine involving various additives,” Ph.D. - Doctoral Program, Middle East Technical University, 2021.