Akademik Veri Yönetim Sistemi
JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.32, sa.1, ss.1-7, 2017 (SCI-Expanded)
In this study, optimal synthesis conditions of important industrial polymer of porous styrene divinylbenzene copolymer (SDVB) beads are investigated in the presence of the ammonia borane in order to increase the porosity of the microspheres. In that purpose, benzoyl peroxide as radical initiator, polyvinyl alcohol (PVA) as stabilization, sodium hydroxide (NaOH), toluene and hexane as organic diluent are used by suspension polymerization. In addition to initiator, different quantities of ammonia borane (AB) are used. In experimental studies, polymerization reaction is carried out under nitrogen atmosphere at 80 degrees C and at atmospheric pressure. As results of parametric studies, copolymer beads are characterized by the surface area and porosity (BET), Fourier transform infrared spectrometry (FTIR), swelling analysis by wet method. It is seen that synthesized copolymers used AB contribute to pore generation and particular size distribution, as DVB percent increases, polymer efficiency increases but swelling percent decreases. By using RSM (Response Surface Method), according to central composite design method, optimum conditions are calculated as 90%DVB; 0, 05 g ammonia borane; 200% solvent quantity and under these conditions, BET surface area of synthesized copolymers is found as156 m(2)/g. As a result of surface modification with acetone, surface area is increased to 274 m(2)/g.