J. Asrar et Jb. Hurlbut, SYNTHESIS, RHEOLOGY, AND PHYSICAL-PROPERTIES OF A METATHESIS POLYMER, Journal of applied polymer science, 50(10), 1993, pp. 1727-1732
This paper describes the synthesis, physical properties, and the impac
t modification of poly (N-phenylnorbornene dicarboximide) (PNDI). Impa
ct modification is carried out both by physical blending with acryloni
trile-butadiene rubber (Hycar(R)) and by in situ metathesis polymeriza
tion of the monomer with the rubber. Better success is achieved by in
situ metathesis polymerization. A copolymer, poly(N-phenylnorbornene d
icarboximide)-co-poly(norbornene nitrile) containing Hycar rubber (PND
I/PNN/Hycar), is prepared with a good balance of high-heat impact and
flexural properties. The melt viscoelastic behavior of PNDI/PNN/Hycar
is evaluated and the energy of activation for viscous flow (E(a)) was
found to be 42 kcal/mol. (C) 1993 John Wiley & Sons, Inc.