Polyamides and Polysulfonamides from Hexahydrobenzodipyrrole

Abstract

A series of polyamides was synthesized by the interfacial polycondensation of 1,2,3,5,6,7-hexahydrobenzo(1,2-c:4,5-c') dipyrrole with isophthalic, terephthalic, oxydibenzoic, sebasic and adipic acid chlorides. High molecular weight polymers with inherent viscosities ranging from 0.4 to 3.6/dl were obtained. These polyamides melt between 350C and 475C depending on structural differences as determined by differential scanning calorimetry. Rapid weight loss in these polymers was observed in the range of 350 - 400C under thermogravimetric analysis in a nitrogen atmosphere. All these polyamides are susceptible to photo-oxidative degradation. In addition, polysulfonamides were also prepared from hexahydrobenzo-dipyrrole with m-benzene, biphenyl and p, p'-oxydibenzenesulfonyl chloride by interfacial polycondensation and by solution polycondensation with (p,p'-oxydibenzenesulfonyl chloride). The polysulfonamides are considerably lower molecular weight and are less stable than the corresponding polyamides.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1974
Accession Number
AD0783496

Entities

People

  • Namassivaya Doddi

Organizations

  • United States Army Soldier Systems Center

Tags

DTIC Thesaurus Topics

  • Armored Vehicles
  • Calorimetry
  • Chemical Synthesis
  • Chemistry
  • Chlorides
  • Heat Energy
  • High Temperature
  • Hydroxides
  • Materials
  • Measurement
  • Molecular Weight
  • Phase Transformations
  • Polymerization
  • Protective Clothing
  • Sodium Hydroxide
  • Thermal Analysis
  • Thermal Stability

Fields of Study

  • Chemistry

Readers

  • Polymer Science and Engineering.
  • Polymer Science and Technology