Thermally Stable Polymers: Syntheses and Properties |
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Page 127
... DMSO under nitrogen with stirring at 25 ° C . After 1.5 hr 3 ml of DMSO is added to the viscous solution , and the mixture is poured into 500 ml of chloroform to yield 0.415 g ( 95 % ) of white to pale yellow fibrous polyamic acid ...
... DMSO under nitrogen with stirring at 25 ° C . After 1.5 hr 3 ml of DMSO is added to the viscous solution , and the mixture is poured into 500 ml of chloroform to yield 0.415 g ( 95 % ) of white to pale yellow fibrous polyamic acid ...
Page 153
... DMSO , NMP , or HMPA ) . NMP was the best solvent , and DMF and DMSO promoted crosslinking . A catalyst was necessary for the reaction , however , the nature of which depended on the types of monomers used . These catalysts included ...
... DMSO , NMP , or HMPA ) . NMP was the best solvent , and DMF and DMSO promoted crosslinking . A catalyst was necessary for the reaction , however , the nature of which depended on the types of monomers used . These catalysts included ...
Page 245
... DMSO and uses tertiary amines as catalysts . A poly ( urethane ester ) can be envisioned as an intermediate structure . C6H502 C OCN но- он С6Н5020- NH - C - 0 ( not isolated ) RN , DMSO -CO2C6H5 O - C - NH -C6H5OH חי -NCO な n The ...
... DMSO and uses tertiary amines as catalysts . A poly ( urethane ester ) can be envisioned as an intermediate structure . C6H502 C OCN но- он С6Н5020- NH - C - 0 ( not isolated ) RN , DMSO -CO2C6H5 O - C - NH -C6H5OH חי -NCO な n The ...
Common terms and phrases
acetone added air or nitrogen aliphatic amide amine anhydride aramids aromatic backbone benzene C. S. Marvel carborane CH₂ CH3 CH3 CH3 Chem chloride chloroform condensation cooled copolymer crosslinking crystalline cyclization decomposition diamine dianhydride dl/g DMAC DMSO dried ether fibers films filtration functions groups heated Hergenrother heterocyclic HMPA hydrazide Imai imide inherent viscosity intermediate intrinsic viscosity isolated isothermal Japan Patent ladder m-cresol m-or Macromol materials melt methanol Method mixture is stirred mmol modulus molecular weight monomer NH-C NH2 NH2 NH2 nitrogen oxadiazole oxide P. M. Hergenrother phenyl phenylene poly polyhydrazide polyimides polymerization polyoxadiazoles postcure poured precipitate the polymer Preprints properties pyridine reaction reflux ring room temperature siloxane sodium solid soluble solution solvent structure sulfone sulfuric acid synthesized tensile strength tetraamines thermal stability thiadiazole tion triazole U.S. Patent vacuo vacuum washed weight loss yellow yield