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A series of dimer acid-based polyamides were synthesized by melt-polycondensation of dimer acid and various aromatic diamines, and were characterized by Fourier transform infrared spectrum (FT-IR) and nuclear magnetic resonance (1H NMR). The physical properties of the polyamides, such as glass transition temperature, melting temperature, decomposition temperature and mechanical properties were also investigated. The polyamides’ intrinsic viscosity ranges from 1.8 dL·g-1 to 2.2 dL·g-1, and the melting temperature ranges from 140 ℃ to 181 ℃. The glass transition temperatures, observed from dynamic mechanical analysis, fall in the range of 34.8-48.2 ℃. The physical and mechanical properties of the resultant polyamides are similar to those of the PA1212. The heat resistance and mechanical properties of poly (4, 4’-diphenylsulfone dimeramide) (PSD) and poly(4, 4’-diphenyl dimeramide) (PPDI) are comparable to those of PA1212.
A series of dimer acid-based polyamides were synthesized by melt-polycondensation of dimer acid and various aromatic diamines, and were characterized by Fourier transform infrared spectrum (FT-IR) and nuclear magnetic resonance (1H NMR). The physical properties of the polyamides , such as glass transition temperature, melting temperature, decomposition temperature and mechanical properties were also investigated. The polyamides’ intrinsic viscosity ranges from 1.8 dL · g-1 to 2.2 dL · g-1, and the melting temperature ranges from 140 ° C to 181 ° C. The glass transition temperatures, observed from dynamic mechanical analysis, fall in the range of 34.8-48.2 ° C. The physical and mechanical properties of the resultant polyamides are similar to those of the PA1212. The heat resistance and mechanical properties of poly , 4’-diphenylsulfone dimeramide (PSD) and poly (4, 4’-diphenyl dimeramide) (PPDI) are comparable to those of PA1212.