Thermally Stable Polymers: Syntheses and Properties |
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Page 104
... precipitate the polyimide . The polymer is dissolved in DMF and reprecipitated in ethanol to yield a dark yellow solid upon drying . The second approach to the above polymer type is to form a phenylated nucleus first with anhydride ...
... precipitate the polyimide . The polymer is dissolved in DMF and reprecipitated in ethanol to yield a dark yellow solid upon drying . The second approach to the above polymer type is to form a phenylated nucleus first with anhydride ...
Page 146
... precipitate the polymer . The solid is washed free of copper salts and dried to yield 101 % of a yellow powder ; inherent viscosity 0.5 d1 / g in chlorobenzene . 6.2 Poly ( phenylenethiophene ) The polyacetylene discussed above can also ...
... precipitate the polymer . The solid is washed free of copper salts and dried to yield 101 % of a yellow powder ; inherent viscosity 0.5 d1 / g in chlorobenzene . 6.2 Poly ( phenylenethiophene ) The polyacetylene discussed above can also ...
Page 205
... precipitate the polymer . The solid is washed thoroughly with water in a blendor and dried ; inherent viscosity 2.5-3.2 d1 / g ( 5 % in DMSO ) . The solid poly ( m , p- phenylenehydrazide ) is ground to 30 mesh to aid solubility ...
... precipitate the polymer . The solid is washed thoroughly with water in a blendor and dried ; inherent viscosity 2.5-3.2 d1 / g ( 5 % in DMSO ) . The solid poly ( m , p- phenylenehydrazide ) is ground to 30 mesh to aid solubility ...
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