Thermally Stable Polymers: Syntheses and Properties |
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Page 161
... intermediate which was soluble in DMAC and DMF ( intrinsic viscosity 0.16 d1 / g in DMF ) . то SO2NH2 C - NH 11 n The poly ( carboxylic amide ) as an intermediate is more reasonable than the polysulfonamide in view of the higher ...
... intermediate which was soluble in DMAC and DMF ( intrinsic viscosity 0.16 d1 / g in DMF ) . то SO2NH2 C - NH 11 n The poly ( carboxylic amide ) as an intermediate is more reasonable than the polysulfonamide in view of the higher ...
Page 270
... intermediates , al- though a one - step process is possible . Note that the first intermediate , a poly ( amide acid amine ) , is similar to amic acid intermediates available in the polyimide and polybenzimidazole syntheses ...
... intermediates , al- though a one - step process is possible . Note that the first intermediate , a poly ( amide acid amine ) , is similar to amic acid intermediates available in the polyimide and polybenzimidazole syntheses ...
Page 282
... intermediate which suffers thermal rearrangement : HS SH + S HCI H2N- NH2 HCI 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 ...
... intermediate which suffers thermal rearrangement : HS SH + S HCI H2N- NH2 HCI 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 ...
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