**Ring Opening Metathesis Polymerization**

DOI: 10.5772/intechopen.71085

Ring Opening Metathesis Polymerization

Alexey Lyapkov, Stanislav Kiselev, Galina Bozhenkova, Olga Kukurina, Mekhman Yusubov and Francis Verpoort Alexey Lyapkov, Stanislav Kiselev, Galina Bozhenkova, Olga Kukurina,

Additional information is available at the end of the chapter Mekhman Yusubov and Francis Verpoort

http://dx.doi.org/10.5772/intechopen.71085 Additional information is available at the end of the chapter

#### Abstract

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In recent years, the olefins metathesis has established itself as a powerful tool for carboncarbon bonds forming and has found numerous applications in polymer chemistry. One of the important directions of metathesis is the polymerization with cycle opening. A study of new ruthenium catalysts, resistant to the many functional groups effects, has showed the possibility of synthesizing functionalized polymers with unique properties. In this chapter, reactivity and activation parameters of eight different norbornene dicarboxylic acid alkyl esters in the presence of a Hoveyda-Grubbs II catalyst for the ring opening metathesis polymerization were determined by <sup>1</sup> H NMR analysis in-situ. The molecules of esters differ in the aliphatic radical structure and the location of the substituent groups. Kinetic studies have shown that effective polymerization constants and activation parameters strongly depend on the monomer structure. It is shown that the elongation of the aliphatic radical does not significantly affect the reactivity, but significantly changes the activation parameters. The branching of the aliphatic radical significantly affects both the reactivity of the corresponding ester and the activation parameters of the polymerization. The position of the substituents in the norbornene ring of the ester also has a significant effect on the activation parameters of metathesis polymerization.

Keywords: ring opening metathesis polymerization, nuclear magnetic resonance, dicyclopentadiene, alkyl esters of norbornene dicarboxylic acid, Hoveyda-Grubbs catalysts, observed rate constant, activation energy
