Thermally Stable Polymers: Syntheses and Properties |
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Page 47
... sodium lauryl sulfate detergent , a trace of sodium hydrosulfite antioxidant , and 0.208 g ( .0052 mol ) of sodium hydroxide in 40 ml of deoxygenated water . After 2 min 0.16 g of tetra - n - butylammonium iodide accelerator in 5 ml of ...
... sodium lauryl sulfate detergent , a trace of sodium hydrosulfite antioxidant , and 0.208 g ( .0052 mol ) of sodium hydroxide in 40 ml of deoxygenated water . After 2 min 0.16 g of tetra - n - butylammonium iodide accelerator in 5 ml of ...
Page 85
... sodium cyanide catalysis of the amide in DMF [ 2 ] . A resonance structure to conjugated double bonds was proposed to explain observed conductivity data . CHEC - C - NH2 DMF , NaCN , 135 ° , 14 days or molten Et N for I hr CH = CH - C ...
... sodium cyanide catalysis of the amide in DMF [ 2 ] . A resonance structure to conjugated double bonds was proposed to explain observed conductivity data . CHEC - C - NH2 DMF , NaCN , 135 ° , 14 days or molten Et N for I hr CH = CH - C ...
Page 126
... sodium chloride , and the product is coagulated in a blendor from 2 % sodium hydroxide solution containing 1 % sodium sulfite . The precipi- tated diamine is washed with a hot 1 % solution of sodium sulfite and methanol and dried in a ...
... sodium chloride , and the product is coagulated in a blendor from 2 % sodium hydroxide solution containing 1 % sodium sulfite . The precipi- tated diamine is washed with a hot 1 % solution of sodium sulfite and methanol and dried in a ...
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