Thermally Stable Polymers: Syntheses and Properties |
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Page 50
... pendant CF3 or CF 30 groups served to lower Tg , the most pronounced effect of this type was realized by injec- tion of the ether function into the backbone . Unfortunately , the service temperature is also lowered in this process but ...
... pendant CF3 or CF 30 groups served to lower Tg , the most pronounced effect of this type was realized by injec- tion of the ether function into the backbone . Unfortunately , the service temperature is also lowered in this process but ...
Page 228
... pendant groups were added . Of course this addition low- ered the thermal stability of the polymer somewhat [ 8 ] . The C14 pendant function yielded a tacky but quite soluble product ( in ethanol , CC14 , pyri- dine , etc. ) . The ...
... pendant groups were added . Of course this addition low- ered the thermal stability of the polymer somewhat [ 8 ] . The C14 pendant function yielded a tacky but quite soluble product ( in ethanol , CC14 , pyri- dine , etc. ) . The ...
Page 389
... pendant groups , 36 by 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 ...
... pendant groups , 36 by 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 ...
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