Thermally Stable Polymers: Syntheses and Properties |
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Page 112
... DMAC , NMP , m - cresol , dichloroacetic acid , and H2SO4 . TGA of these materials shows that the sulfide linkage is weaker in thermooxidation than the methylamino . The former shows a 10 % weight loss at 350 ° C and the latter at 440 ...
... DMAC , NMP , m - cresol , dichloroacetic acid , and H2SO4 . TGA of these materials shows that the sulfide linkage is weaker in thermooxidation than the methylamino . The former shows a 10 % weight loss at 350 ° C and the latter at 440 ...
Page 171
... DMAC ( or DMF , NMP , or DMSO ) is heated at reflux under nitrogen for 5 hr . Then about 65 ml of DMAC is removed by vacuum distillation , and the residue is poured into 100 ml of water to precipitate a cream - colored polymer . The ...
... DMAC ( or DMF , NMP , or DMSO ) is heated at reflux under nitrogen for 5 hr . Then about 65 ml of DMAC is removed by vacuum distillation , and the residue is poured into 100 ml of water to precipitate a cream - colored polymer . The ...
Page 282
... DMAC , 25 ° toxxxpot - taxxo ) to H N H S H N H and / or vacuum 200 ° , 7.5 hr or 250 ° , 3 min חי H and / or tox S N H H of Both intermediate and final products are soluble in DMAC , pyridine , or DMSO , and the former gives an ...
... DMAC , 25 ° toxxxpot - taxxo ) to H N H S H N H and / or vacuum 200 ° , 7.5 hr or 250 ° , 3 min חי H and / or tox S N H H of Both intermediate and final products are soluble in DMAC , pyridine , or DMSO , and the former gives an ...
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