Mechanical, Thermal and Surface Properties of a New Kind of Polybenzoylthiourea

A new kind of polybenzoylthiourea polymer (PBTU) was synthesized through a polycondensation reaction between 3,5-diamino-1,2,4-triazole and tereftaloyl diisothiocyanate inpoly(ethyleneglycol)dimethylether (PEG) as the phase transfer catalyst. Obtained highly soluble in organic solvents including dimethyl formamide (DMF) dimethylsulfoxide (DMSO) contrast to insoluble nature similar benzoylthiourea polymers reported literature. Solubility obtained allowed us measure molecular weight samples by gel permeation chromatography (GPC) analysis. GPC analysis results interestingly showed bimodal distribution probably due oligomeric PEG residuals during work up procedure. Structure characterized 1H NMR, 13C NMR elemental The glass transition temperature (Tg) melting (Tm) observed at 229oC 304oC, respectively. Total pore volume surface area were calculated 0.292 cm3/g 17.773 m²/g, Hardness elastic modulus PBTU capsule measured respectively 2.353 GPa 0.136 using nanoindentation technique.