Thermally Stable Polymers: Syntheses and Properties |
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Page 87
... hydrazides ) ( para catenation gives optical anisotropy in H2SO4 ) Ultrahigh - modulus fibers from rigid and semirigid aramids , poly ( p - benzamide ) and poly ( terephthalamide ) of p - aminobenz- hydrazide , " X - 500 " ) Synthesis ...
... hydrazides ) ( para catenation gives optical anisotropy in H2SO4 ) Ultrahigh - modulus fibers from rigid and semirigid aramids , poly ( p - benzamide ) and poly ( terephthalamide ) of p - aminobenz- hydrazide , " X - 500 " ) Synthesis ...
Page 156
... hydrazide ) intermediate , which is useful for processing since it is soluble in DMSO , NMP , DMF , and DMAC . It can be cast to films prior to cyclodehydration . CONH NH2 он NH2 NMP 25 ° но NH- C - NHNH - C མ་ེ ས་ D ས ༔ ] 7:00 300 ...
... hydrazide ) intermediate , which is useful for processing since it is soluble in DMSO , NMP , DMF , and DMAC . It can be cast to films prior to cyclodehydration . CONH NH2 он NH2 NMP 25 ° но NH- C - NHNH - C མ་ེ ས་ D ས ༔ ] 7:00 300 ...
Page 301
... hydrazide , and oxadiazole analogs [ 42 ] . -NH2 NH2 C6H5 ➤NH - C- C6H5 Si C6H5 HO ) . -COCI 2 N2H4 H2SO C6H5 H - NH - C -Si H Theat C6H5 C6H5 -CO2 t C6H5 N- -N C6H5 traoxokol NH . NH2 -NH2 NH2 All products are soluble and by solution ...
... hydrazide , and oxadiazole analogs [ 42 ] . -NH2 NH2 C6H5 ➤NH - C- C6H5 Si C6H5 HO ) . -COCI 2 N2H4 H2SO C6H5 H - NH - C -Si H Theat C6H5 C6H5 -CO2 t C6H5 N- -N C6H5 traoxokol NH . NH2 -NH2 NH2 All products are soluble and by solution ...
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