1,4,5,8-Naphthalenetetracarboxylic Acid CAS NO: 128-97-2

Name: 1,4,5,8-Naphthalenetetracarboxylic acid
CAS NO: 128-97-2
Purity: 98% min
MF: C14H8O8
MW:304.208
BP:737.9±60.0 °C at 760 mmHg
Density:1.8±0.1 g/cm3

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Features

1,4,5,8-Naphthalenetetracarboxylic acid CAS NO: 128-97-2 could as the

dye intermediates can be used in the production of dye plastics such as VAT brilliant orange GR for the manufacture of novel resin polyimides and TNM polymers with excellent insulation, radiation resistance and high temperature (400) resistance.

Polycondensations of 1,4,5,8-naphthalenetetracarboxylic acid (NTCA)

CAS NO: 128-97-2 with both 3,3 -diaminobenzidine (DAB) and 1,2,4,5-tetraaminobenzene tetrahydrochloride (TAB) in polyphosphoric acid (PPA) were found to produce soluble polymers which exhibit excellent thermal stabilities. Polymer structures were deduced from infrared, thermal, and elemental analyses of model compounds and polymers. Polymer derived from TAB had a ladder-type structure. Polymers with solution viscosities near 1 or above (determined in H 2 SO 4 ) were obtained from polymerizations near 200 C., and analysis showed these to possess a very high degree of completely cyclized benzimidazobenzophenanthroline structure. Less vigorous reaction conditions gave polymers with lower solution viscosities which appeared to be less highly cyclized. Low-viscosity polymer was also prepared from DAB and NTCA CAS NO: 128-97-2 by solid-phase polycondensation. Some advancements in the solution viscosities of polymers synthesized from DAB in PPA were caused by second staging in the solid phase.