Thermally Stable Polymers: Syntheses and Properties |
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Page 112
... imide backbone impart impact strength as discussed for other systems ( sulfone - containing polyamides and polysulfone ether imides ) . This amide imide sulfone is tractable with a Tg of 270 ° C , tensile modulus 2.6 GPa ( 370,000 psi ) ...
... imide backbone impart impact strength as discussed for other systems ( sulfone - containing polyamides and polysulfone ether imides ) . This amide imide sulfone is tractable with a Tg of 270 ° C , tensile modulus 2.6 GPa ( 370,000 psi ) ...
Page 113
... imides . Another approach to polyamide imides is to use a trimellitic acid derivative which utilizes an imidazolide function as a leaving group and a preformed imide function so that postcuring is unnecessary [ 24,61 ] . ( This reaction ...
... imides . Another approach to polyamide imides is to use a trimellitic acid derivative which utilizes an imidazolide function as a leaving group and a preformed imide function so that postcuring is unnecessary [ 24,61 ] . ( This reaction ...
Page 114
... imide content . Specifically , the polymer with 20 mol % terephthalic acid was least in stability , while that with 100 % pyromellitic was most . It is of interest that the ideal , i.e. , 50:50 , amide imide , being only about 5 ° C ...
... imide content . Specifically , the polymer with 20 mol % terephthalic acid was least in stability , while that with 100 % pyromellitic was most . It is of interest that the ideal , i.e. , 50:50 , amide imide , being only about 5 ° C ...
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