Background: Ring Opening Metathesis Polymerization (ROMP) can provide a wide range of possibilities
for polymers and copolymers synthesis. Norbornene and its derivatives can serve as monomers for the synthesis
of highly molecular mass polymers with widely varying structure.
Objective: In this paper a new polymers based on dimethyl ether norbornenedicarboxylic acids were prepared by
ring-opening metathesis polymerization in the presence of a catalyst of Hoveyda-Grubbs II.
Method: The resulting polymers and monomers were characterized by NMR, IR, GCMS, TGA, DSC.
Results: Chemical yield of investigated processes was more than 95 %, molecular mass of the obtained polymers
was also relatively high (more than 4.5•106 g/mol). The research findings have shown that polymers obtained
with bi- and tri-functional comonomers are more heat resistant and are stable up to the 370 °C. Also it was shown
that the addition of bi-and tri-functional comonomers facilitates the significant improving of mechanical and
physical properties. Polymer obtained with 3 wt.% of tri-functional comonomer possesses the biggest values of
modulus of elasticity in flexure, breaking elongation and breaking strength.
Conclusion: New polymers based of exo,exo and endo,endo-dimethyl esters of 5-norbornen-2,3-dicarbonic acid
(DME) with addition of bi-functional and tri-functional comonomers were synthesized via metathesis polymerization.
The addition of 3 wt.% of bi-functional and tri-functional comonomers resulted in polymers having a
higher crosslinking degree and glass transition temperature. The synthesized polymers demonstrated a higher application
temperature and better mechanical and physical properties than poly-DME.