Thermally Stable Polymers: Syntheses and Properties |
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Page 6
... ladder polymers isolated but not fully cyclized Poly ( p - xylylene ) Low molecular weight polyphenylenes ( a ) Polyoxadiazoles first recognized ( b ) Aromatic polyamides patented Polyphenylenes of high molecular weight ( through 1967 ) ...
... ladder polymers isolated but not fully cyclized Poly ( p - xylylene ) Low molecular weight polyphenylenes ( a ) Polyoxadiazoles first recognized ( b ) Aromatic polyamides patented Polyphenylenes of high molecular weight ( through 1967 ) ...
Page 284
... Ladder Polymers 9.4-1 Poly ( benzimidazobenzophenanthrolines ) The rather complex phenanthroline ladder and near - ladder systems have been investigated almost exclusively by Air Force research laboratories or under their sponsorship ...
... Ladder Polymers 9.4-1 Poly ( benzimidazobenzophenanthrolines ) The rather complex phenanthroline ladder and near - ladder systems have been investigated almost exclusively by Air Force research laboratories or under their sponsorship ...
Page 288
... Ladder Polymers Perhaps the ultimate in rigid , ladder backbones was discovered in 1972 , again in Marvel's laboratory [ 35 ] . A two - step process consisting of a solution condensation and a postcure leads to an insoluble , black ...
... Ladder Polymers Perhaps the ultimate in rigid , ladder backbones was discovered in 1972 , again in Marvel's laboratory [ 35 ] . A two - step process consisting of a solution condensation and a postcure leads to an insoluble , black ...
Common terms and phrases
acetone added air or nitrogen aliphatic amide amine anhydride aramids aromatic backbone benzene C. S. Marvel carborane CHâ‚‚ 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