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한철,손준연,김희선,윤두수,최재곤 조선대학교 생산기술연구소 2007 生産技術硏究 Vol.29 No.1
Polyhydroxyamides(PHAs) having ether linkages in the polymer backbone were synthesized by solution polycondensation at low tmperature. The PHAs were studies by FT-IR, ^(1)H-NMR, DSC, and TGA. The inherent viscosities of the PHAs showed in the range of 0.5-1.1 dL/g at 35℃ in DMAc solution. Solubility of the PHAs were soluble in DMAc, DMF, DMSO, NMP, and pyhdine, but the PBOs were nearly insoluble in a variety of solvents. PHAs were converted to polybenzoxazoles(PBOs) by thermal cyclization reaction with heat of endotherm. The degradation temperatures of the polymers were recorded in the ranges of 591-683℃ in N₂.