Thermally Stable Polymers: Syntheses and Properties |
From inside the book
Results 1-3 of 76
Page 31
... washed with benzene , stirred with dilute HC1 and ice , filtered , and triturated repeatedly with boiling HC1 to yield a colorless filtrate . The polymeric residue was then boiled in 2 M sodium hydroxide and again triturated in boiling ...
... washed with benzene , stirred with dilute HC1 and ice , filtered , and triturated repeatedly with boiling HC1 to yield a colorless filtrate . The polymeric residue was then boiled in 2 M sodium hydroxide and again triturated in boiling ...
Page 33
... washed well with concentrated HC1 to remove iron impurities , washed with water , and dried in a vacuum oven at 100 ° C , to give 0.6 g of product . Crosslinking Into a 50 - ml flask equipped with a magnetic stirrer and a reflux ...
... washed well with concentrated HC1 to remove iron impurities , washed with water , and dried in a vacuum oven at 100 ° C , to give 0.6 g of product . Crosslinking Into a 50 - ml flask equipped with a magnetic stirrer and a reflux ...
Page 210
... washed with chloroform , and dried . It is then puri- fied by dissolution in H2SO4 and reprecipitation into water . It is collected , washed well with water , and dried in vacuo at 100 ° C to yield 1.1 g ( 88.7 % ) of white powder , mp ...
... washed with chloroform , and dried . It is then puri- fied by dissolution in H2SO4 and reprecipitation into water . It is collected , washed well with water , and dried in vacuo at 100 ° C to yield 1.1 g ( 88.7 % ) of white powder , mp ...
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