Thermally Stable Polymers: Syntheses and Properties |
From inside the book
Results 1-3 of 46
Page 32
... methanol for 10 hr , and the dark brown product is extracted with benzene . The filtrate is treated with petroleum ether to precipi- tate the polymer in a yield of 65 % . 2.1-2 By Poly ( cyclohexadiene ) Aromatization The second ...
... methanol for 10 hr , and the dark brown product is extracted with benzene . The filtrate is treated with petroleum ether to precipi- tate the polymer in a yield of 65 % . 2.1-2 By Poly ( cyclohexadiene ) Aromatization The second ...
Page 146
... methanol which contains 10 ml of conc . HC1 . The precipitate is collected and washed by stirring in another batch of methanol - HC1 and finally with methanol alone . The polymer is isolated and dried under vacuum at room temperature to ...
... methanol which contains 10 ml of conc . HC1 . The precipitate is collected and washed by stirring in another batch of methanol - HC1 and finally with methanol alone . The polymer is isolated and dried under vacuum at room temperature to ...
Page 286
... methanol to precipitate the polymer , which is washed with methanol , vacuum - dried , and reprecipitated from methanesulfonic acid into methanol . When washed with methanol and dried again , the polymer is received in 97 % yield ( 1.11 ...
... methanol to precipitate the polymer , which is washed with methanol , vacuum - dried , and reprecipitated from methanesulfonic acid into methanol . When washed with methanol and dried again , the polymer is received in 97 % yield ( 1.11 ...
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