Examining the Thermal Degradation Behaviour of a Series of Cyanate Ester Homopolymers

Siddan Gouthaman, Venkatesh Madhu, Stanley Olivier Kanemoto, Suguna Lakshmi Madurai, Ian Hamerton*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

1 Citation (Scopus)

Abstract

A series of thermally stable dicyanate monomers, containing different thermally stable structural units, viz 2,2’-bis (4-cyanatophenyl)propane (DCDPP), bis-4-cyanato-biphenyl (DCBP), bis-4-cyanato naphthalene (DCN), 3,3’-bis(4-cyanatophenyl) sulphide (DCTDP) and 3,3’-bis (4-cyanatophenyl) sulphone (DCDPS), is prepared and the identity of the products confirmed by FT-IR and NMR spectral methods. The corresponding cyanate homopolymers (designated by the suffix HP) are prepared and their properties evaluated and compared. The composites were analysed for their thermal stability and thermal degradation kinetics. The series of homopolymers exhibit excellent thermal characteristics e.g. relatively high glass transition temperatures of at least 215 ºC, which were inversely proportional to the molecular weight between the crosslinks, high thermal decomposition temperature, high integral procedural decomposition temperature (IPDT), and high activation energies for the decomposition of the cured resins. Determination of their limiting oxygen indices indicates that all the homopolymers are characterized as ‘self-extinguishing’ materials.
Original languageEnglish
Pages (from-to)1666-1672
Number of pages7
JournalPolymer International
Volume68
Issue number10
Early online date25 Jul 2019
DOIs
Publication statusPublished - 10 Sep 2019

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Structured keywords

  • Bristol Composites Institute ACCIS

Keywords

  • curing
  • cyanate esters
  • flame retardance
  • homopolymers
  • thermogravimetric analysis

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