Thermally Stable Polymers: Syntheses and Properties |
From inside the book
Results 1-3 of 49
Page 33
... filtration and washed well with water and dried in a vacuum oven at 100 ° C . Excessive washing with water results in a loss of product . The degree of sulfonation is 50 % ; i.e. , there is an average of one sulfonic acid group for two ...
... filtration and washed well with water and dried in a vacuum oven at 100 ° C . Excessive washing with water results in a loss of product . The degree of sulfonation is 50 % ; i.e. , there is an average of one sulfonic acid group for two ...
Page 83
... filtration , washed with water , and dried . Inherent viscosities range from 0.2 to 7.8 d1 / g in DMAc / 5 % LiCl solvent at a concentration of 0.1 g / 100 ml . 4.2 Poly ( diphenylamine ) Although amines are generally avoided in high ...
... filtration , washed with water , and dried . Inherent viscosities range from 0.2 to 7.8 d1 / g in DMAc / 5 % LiCl solvent at a concentration of 0.1 g / 100 ml . 4.2 Poly ( diphenylamine ) Although amines are generally avoided in high ...
Page 131
... filtration and then dissolved in hot chloroform . Ethanol is added to the boiling chloroform solu- tion until it turns cloudy , and it is then cooled to room temperature . The red powder , which is collected by suction filtration ...
... filtration and then dissolved in hot chloroform . Ethanol is added to the boiling chloroform solu- tion until it turns cloudy , and it is then cooled to room temperature . The red powder , which is collected by suction filtration ...
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