Thermally Stable Polymers: Syntheses and Properties |
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Page 69
... NH - C - NH C - NH - R- O = U -NH - C -N 5020 Softens at 140-260 ° C . Stable to 340 ° C . Soluble . C - NH - R Thermal properties are lowered by sulfone group . N - SO2 - R - SO2 Stable to 300 ° C . Acid - soluble . 2 N N = CH- CH = CH - C ...
... NH - C - NH C - NH - R- O = U -NH - C -N 5020 Softens at 140-260 ° C . Stable to 340 ° C . Soluble . C - NH - R Thermal properties are lowered by sulfone group . N - SO2 - R - SO2 Stable to 300 ° C . Acid - soluble . 2 N N = CH- CH = CH - C ...
Page 237
... C - NH COCI NHANH2 NMP or DMAC +0.01 Ar -NH - C - 0 NH27 O Ar NH - C - NH CH302C Ar NH - C - NH CO2CH3 な N H Ar P - C6H4 , or Ar'is : or H CH302C NH2 CO2CH3 1 Bulk , 120 ° , 12 hr -200H C - NH - Ar - NH - C vacuum 200-300 ° 4 hr " NHANH C ...
... C - NH COCI NHANH2 NMP or DMAC +0.01 Ar -NH - C - 0 NH27 O Ar NH - C - NH CH302C Ar NH - C - NH CO2CH3 な N H Ar P - C6H4 , or Ar'is : or H CH302C NH2 CO2CH3 1 Bulk , 120 ° , 12 hr -200H C - NH - Ar - NH - C vacuum 200-300 ° 4 hr " NHANH C ...
Page 324
... NH - C - NH- NH - C - R- C - NH - NH - C - NH C6H5 NHIỆM + n The phosphonylureas are obtained in yields of generally 77-96 % , with intrinsic viscosities of 0.05-0.12 d1 / g in formic acid , and possess soft- ening points of 165-280 ° C ...
... NH - C - NH- NH - C - R- C - NH - NH - C - NH C6H5 NHIỆM + n The phosphonylureas are obtained in yields of generally 77-96 % , with intrinsic viscosities of 0.05-0.12 d1 / g in formic acid , and possess soft- ening points of 165-280 ° C ...
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