采用流变学方法研究聚酰胺酸6FDA-TFDB溶液的降解行为-高分子学报.PDF,第 9 期高分子学报 No. 9 2017 年 9 月 ACTA POLYMERICA SINICA Sep., 2017 采用流变学方法研究聚酰胺酸6FDA-TFDB溶液的降解行为* 1,3 2,3 1 1 1 2 2 1** 张恩菘 代学民 刘学 杨文轲 刘巍 董志鑫
通过沉淀分级获得高分子量(390,000 g/mol)的6FDA-TFDB聚酰亚胺样品,采用流变手段研究聚酰亚胺在环己酮溶液中的溶胶-凝胶转变.动态流变结果表明,在高于某一浓度时溶液表现出凝胶行为.稳态剪切实验中,当浓度高于接触浓度C*时,由于链内缔合逐渐转化为链间缔合,可以观察到剪切变稀和剪切增稠行为.基于Winter和Chambon方法...
Influence of molecular weight on scaling exponents and critical concentrations of one soluble 6FDA-TFDB polyimide in solutionPOLYIMIDESMOLECULAR weightsSOLUTION (Chemistry)TEMPERATURE effectELECTROSPINNINGPolyimde (PI) samples with different molecular weights were synthesized. Based on SEC...
Deposition of fluorinated polyimide consisting of 6FDA and TFDB into microscale trenches using supercritical carbon dioxideDeposition of fluorinated polyimide consisting of 6FDA and TFDB into microscale trenches using supercritical carbon dioxideFluorinated polyimideDeposition...
Influence of molecular weight on scaling exponents and critical concentrations of one soluble 6FDA-TFDB polyimide in solutionSoluble polyimideScaling exponentCritical concentrationMolecular weightPolyimde (PI) samples with different molecular weights were synthesized. Based on SEC coupled with multidetectors ...