Thermally Stable Polymers: Syntheses and Properties |
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Page 72
... HMPA , and HMPA or NMP ) and , of course , an acid acceptor ( tertiary amine ) is employed as in the interfacial method ( similar to the nylon rope trick ) . Method Solution polymerization of m - aminobenzoyl chloride hydro- chloride ...
... HMPA , and HMPA or NMP ) and , of course , an acid acceptor ( tertiary amine ) is employed as in the interfacial method ( similar to the nylon rope trick ) . Method Solution polymerization of m - aminobenzoyl chloride hydro- chloride ...
Page 206
... HMPA . To this vigorously stirred slurry is added a cold solution of 4.060 g ( 0.020 mol ) of isophthaloyl chloride in 24 ml of HMPA over 0.5 hr under nitrogen . The mixture is stirred at 5 ° C for 3 hr and at 25 ° C for 18 hr to result ...
... HMPA . To this vigorously stirred slurry is added a cold solution of 4.060 g ( 0.020 mol ) of isophthaloyl chloride in 24 ml of HMPA over 0.5 hr under nitrogen . The mixture is stirred at 5 ° C for 3 hr and at 25 ° C for 18 hr to result ...
Page 223
... HMPA , and HMPA + 10 % LiC1 ) gave polymers of good yield ( 90 % ) but low molecular weight due to precipitation of the product . OHC H2N CHO -NH2 solvent 25-80 ° E - CH3 CH3C - Ar - C - CH3 Ar is : P - C6H4 KOH / CH3OH 1 , or Ar N The ...
... HMPA , and HMPA + 10 % LiC1 ) gave polymers of good yield ( 90 % ) but low molecular weight due to precipitation of the product . OHC H2N CHO -NH2 solvent 25-80 ° E - CH3 CH3C - Ar - C - CH3 Ar is : P - C6H4 KOH / CH3OH 1 , or Ar N The ...
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