The effects of cure temperature history on the stability of hinged structure poly（4,4-oxydiphenylene pyromellitimide）（PMDA-ODA） polyimide were studied by dynamic mechanical analysis.The polyimide films were cured ...The effects of cure temperature history on the stability of hinged structure poly（4,4-oxydiphenylene pyromellitimide）（PMDA-ODA） polyimide were studied by dynamic mechanical analysis.The polyimide films were cured under different curing conditions and peeled off by substrate etching.It was found that a proper cure time and temperature ramp rate improves the stability in terms of higher glass transition temperature.Ninety minutes at 375℃or 200℃is a beneficial high glass transition temperature.The temperature ramp rate should be between 2℃/min and 10℃/min,which is neither too high nor too low.展开更多
基金supported by the National Science and Technology Major Project(No.2009ZX02025-1)
文摘The effects of cure temperature history on the stability of hinged structure poly（4,4-oxydiphenylene pyromellitimide）（PMDA-ODA） polyimide were studied by dynamic mechanical analysis.The polyimide films were cured under different curing conditions and peeled off by substrate etching.It was found that a proper cure time and temperature ramp rate improves the stability in terms of higher glass transition temperature.Ninety minutes at 375℃or 200℃is a beneficial high glass transition temperature.The temperature ramp rate should be between 2℃/min and 10℃/min,which is neither too high nor too low.
