Thermally Stable Polymers: Syntheses and Properties |
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Page 39
... polymerization ; i.e. , there is no mobility of the backbone and no liquid state so that neighboring groups cannot suffer hydrogen exchange . As a result free radi- cals are trapped in the polymer , a fact which has been confirmed by ...
... polymerization ; i.e. , there is no mobility of the backbone and no liquid state so that neighboring groups cannot suffer hydrogen exchange . As a result free radi- cals are trapped in the polymer , a fact which has been confirmed by ...
Page 133
... polymer science has been used with polyimides : PMR , meaning polymerization of monomeric reactants . One interesting finding is from the study of model compounds which shows that major impurities are chemically bound solvent residues ...
... polymer science has been used with polyimides : PMR , meaning polymerization of monomeric reactants . One interesting finding is from the study of model compounds which shows that major impurities are chemically bound solvent residues ...
Page 304
... Polymer Chemistry , John Wiley and Sons , New York , 1961 , p . 32 ) , ( 20.381 g , 0.090 mol ) is transferred into the polymerization flask along with toluene ( 30 ml , distilled from Na ) . Additional bis ( dimethylamino ) dimethyl ...
... Polymer Chemistry , John Wiley and Sons , New York , 1961 , p . 32 ) , ( 20.381 g , 0.090 mol ) is transferred into the polymerization flask along with toluene ( 30 ml , distilled from Na ) . Additional bis ( dimethylamino ) dimethyl ...
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