Thermally Stable Polymers: Syntheses and Properties |
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Page 107
... acetone to dissolve the monomer . The precipitated polymers are washed with acetone and dried . 5.1-6 Novel Polyimides from Less Common Dianhydrides To this point all imide systems were derived from maleic or phthalic anhy- dride ...
... acetone to dissolve the monomer . The precipitated polymers are washed with acetone and dried . 5.1-6 Novel Polyimides from Less Common Dianhydrides To this point all imide systems were derived from maleic or phthalic anhy- dride ...
Page 169
... acetone ; and the yellow precipitate is collected , washed with acetone , and extracted for 1 day with ethanol and for 1 day with benzene . PBI is dried at 120 ° C in vacuo to yield 7.70 g ( 100 % ) of yellow solid with inherent ...
... acetone ; and the yellow precipitate is collected , washed with acetone , and extracted for 1 day with ethanol and for 1 day with benzene . PBI is dried at 120 ° C in vacuo to yield 7.70 g ( 100 % ) of yellow solid with inherent ...
Page 202
... acetone and collected by filtration . While on the filter , the product is rinsed with 250 ml of acetone and then washed seven times in the blendor with successive 500 - ml portions of water . The polymer is again collected by ...
... acetone and collected by filtration . While on the filter , the product is rinsed with 250 ml of acetone and then washed seven times in the blendor with successive 500 - ml portions of water . The polymer is again collected by ...
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