Thermally Stable Polymers: Syntheses and Properties |
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Page 211
... condensation with aluminum chloride of aromatic diamines and dinitriles , followed by ( 2 ) a cyclization of the amidine intermediate [ 181 ] . The product exhibits a quite rigid backbone but is soluble in DMF ( inherent viscosity of ...
... condensation with aluminum chloride of aromatic diamines and dinitriles , followed by ( 2 ) a cyclization of the amidine intermediate [ 181 ] . The product exhibits a quite rigid backbone but is soluble in DMF ( inherent viscosity of ...
Page 270
... condensation of an aromatic tetraacid with an aromatic tetraamine via two intermediates , al- though a one - step process is possible . Note that the first intermediate , a poly ( amide acid amine ) , is similar to amic acid ...
... condensation of an aromatic tetraacid with an aromatic tetraamine via two intermediates , al- though a one - step process is possible . Note that the first intermediate , a poly ( amide acid amine ) , is similar to amic acid ...
Page 389
... condensation of 4,4 ' - biphenylene diazonium salts , 40 crosslinked , 40 crosslinking of , 32 by Diels - Alder reaction , 33 by Friedel - Crafts condensation of benzene , 40 with phenyl pendant groups , preparation of , by direct ...
... condensation of 4,4 ' - biphenylene diazonium salts , 40 crosslinked , 40 crosslinking of , 32 by Diels - Alder reaction , 33 by Friedel - Crafts condensation of benzene , 40 with phenyl pendant groups , preparation of , by direct ...
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