New aromatic poly(azomethine urethane)s containing o-tolidine moiety in the polymer backbone

摘要

A new bisphenol containing azomethine groups,N,N'-bis(4-hydroxy-3-methoxy benzyl-idene)-o-tolidine(I)was synthesized and characterized by ~1H-NMR,FTIR,UV,CHN analysis and mass spectroscopy.The polymerization was carried out with various diisocyanates such as hexamethylene diisocyanate(HDI)(a),methylene-4,4'-diphenyl diisocyanate(MDI)(b)and toluene-2,4-diisocyanate(TDI)(c).The resulting polymers Ia-c were confirmed by ~1H-NMR,FT-IR,UV and CHN analysis.Thermogravimetric analysis(TGA)revealed polymers have high thermal stability.A semicrys-talline behavior was noticed for polymers by wide-angle X-ray diffraction(WAXD)and differential scanning calorimetry(DSC).