【摘 要】
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Cross-linked polyamides (cPAs) were prepared through direct bulk Michael addition and subsequent polycondensation.Several mixed hexanediamine multi-esters (HDAM
【机 构】
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Key Laboratory of Carbon Fiber and Functional Polymers(Beijing University of Chemical Technology), M
论文部分内容阅读
Cross-linked polyamides (cPAs) were prepared through direct bulk Michael addition and subsequent polycondensation.Several mixed hexanediamine multi-esters (HDAMEs) were generated through the Michael addition of 1,6-hexanediamine (HDA) and methyl acrylate (MA) at 50 ℃ with different HDA/MA molar ratios.Melt polycondensation of HDAMEs then proceeded at 150 or 170 ℃ in flasks to obtain viscous fluids,and curing was continued in tetrafluoroethylene molds to obtain cPA films.The Michael addition was monitored on the basis of FTIR and ESI-MS spectra.The cPA films were characterized by DSC,TGA,dynamic mechanical analysis,and tensile test.These directly prepared cPAs exhibited Tg of 1-39 ℃,tensile strength of up to 45 MPa,and strain at break from 18% to 40%.The cPAs with high tensile strength and good toughness were successfully synthesized through the direct bulk Michael addition from HDA and MA followed with polycondensation.
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