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- W835752904 abstract "Polyhydroxyamides(PHAs) having poly(ethylene glycol)methyl ether (MPEG) and/or dimethylphenoxy pendant groups were synthesized by solution polycondensation at low temperature. The inherent viscosities of the PHAs measured at in DMAC or DMAc/LiCl solution were in the range of . This precursor polymers were studied by FT-IR, , DSC, and TGA. Solubility of the precursors with higher MPEG unit was increased, especially the polymer having MPEG was soluble or partially soluble in ethanol, methanol, and water as well as aprotic solvents, 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. In case of the precursors having MPEG nit, the precursor polymers with a higher were fully cyclized at a lower temperature than one with a lower ." @default.
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- W835752904 date "2005-01-01" @default.
- W835752904 modified "2023-09-27" @default.
- W835752904 title "Syntheses and Characterization of PBO Precursors Containing Dimethylphenoxy and/or MPEG Pendant Groups" @default.
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