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Flammability Studies of New Cyanate Ester Resins



Jeffrey W. Gilman, Richard H. Harris Jr., James E. Brown


We have synthesized several new cyanate ester functionalized polystyrene polymers and copolymers. Poly(4-cyanatostyrene), PCS, poly(4-cyanatostyrene) "polymer grade", PCS-PG, poly(4-cyanatostyrene "novalak grade", PCS-NG, poly(4-cyanatostyrene-co-methylmethacrylate), PCS-MMA, and poly(4-cyanatostyrene-co-1,3-butadiene), PCS-BD, were all prepared via cyanation of the corresponding 4-hydroxystyrene polymer or copolymer, using cyanogen bromide and triethylamine. The synthesis gives good yields of these polymers. Differential scanning calorimetry, DSC, of these polymers shows that they cure completely under standard, non-catalyzed, thermal cure conditions. flammability tests, performed using the a Microscale Combustion Calorimeter, show significant differences in flammability of the cured polymers, depending on polymer structure.
Proceedings Title
SAMPE Symposium and Exhibition, 42nd International Proceedings. Volume 42. Book 2
Conference Dates
May 4-8, 1997
Conference Location
Anaheim, CA
Conference Title
Evolving Technologies for the Competitive Edge


cyanate ester, flammability, synthesis, polyptyrene, toughening


Gilman, J. , Harris, R. and Brown, J. (1997), Flammability Studies of New Cyanate Ester Resins, SAMPE Symposium and Exhibition, 42nd International Proceedings. Volume 42. Book 2, Anaheim, CA, [online], (Accessed July 25, 2024)


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Created May 4, 1997, Updated February 19, 2017