Thermally Stable Polymers: Syntheses and Properties |
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Page 146
... room temperature to yield 4.92 g ( 99.5 % ) of pale yellow solid ; intrinsic viscosity 1.44 d1 / g in o - dichlorobenzene at 120 ° C . The dry polydiethynylbenzene decomposes violently with . shock , spark , or heat . Furthermore , it ...
... room temperature to yield 4.92 g ( 99.5 % ) of pale yellow solid ; intrinsic viscosity 1.44 d1 / g in o - dichlorobenzene at 120 ° C . The dry polydiethynylbenzene decomposes violently with . shock , spark , or heat . Furthermore , it ...
Page 163
... room temperature , and 1.08 g ( 10 mmol ) of p - phenylene diamine is added with stirring . The temperature rises to 40 ° C and a precipitate forms . The mixture is cooled to room temperature and stirred for 4 hr . The DMF is removed by ...
... room temperature , and 1.08 g ( 10 mmol ) of p - phenylene diamine is added with stirring . The temperature rises to 40 ° C and a precipitate forms . The mixture is cooled to room temperature and stirred for 4 hr . The DMF is removed by ...
Page 198
... air to form the polythiazole is done using the following schedule : room temperature to 250 ° C at 4 ° / min ; 250-300 ° C at 1 ° / min ; 300 ° C for 1 hr ; 300-350 ° C at 1 ° / min ; 350 ° for 1-1 / 4 hr ; 350-375 ° C at 1 ° / min ...
... air to form the polythiazole is done using the following schedule : room temperature to 250 ° C at 4 ° / min ; 250-300 ° C at 1 ° / min ; 300 ° C for 1 hr ; 300-350 ° C at 1 ° / min ; 350 ° for 1-1 / 4 hr ; 350-375 ° C at 1 ° / min ...
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