We have presented an efficient strategy for the synthesis of trimethylsiloxy end-functionalized new polymers using ring-opening metathesis polymerization with ruthenium initiator, [(PCy3)2Cl2Ru=CHPh]. The key steps for the new silicon containing end-capped polymers are: In the first step, direct end-capping is carried out by adding cis-2-butene-1,4-diol to the ring-opened norbornene dicarboximides. In the second step, the reaction of hydroxy-functionalized polymers with trimethylsilyl chloride gives trimethylsiloxy-functionalized polymers. The best results for the end group introduction are achieved by reacting the living chains with an excess of the terminating agent. The molecular and structural features of the obtained polymers were confirmed by NMR and GPC analyzes, and their thermal properties were investigated by DSC. End-functionalization efficiency values were determined by NMR spectroscopy.
Cramail H, Fontanille M, Soum A (1991) Functional oligomers of norbornene: Part 1. Oligomerization by ring-opening metathesis polymerization in the presence of unsaturated diesters. J Mol Catal 6:193–203CrossRefGoogle Scholar
Chung TC, Chasmawala M (1991) A new synthetic route to telechelic polymers. Macromolecules 24:3718–3720CrossRefGoogle Scholar
Hillmyer MA, Grubbs RH (1993) Preparation of hydroxytelechelic poly(butadiene) via ring-opening metathesis polymerization employing a well-defined metathesis catalyst. Macromolecules 26:872–874CrossRefGoogle Scholar
Hilf S, Berger-Nicoletti E, Grubbs RH (2006) Monofunctional metathesis polymers via sacrificial diblock copolymers. Angew Chem Int Ed 45:8045–8048CrossRefGoogle Scholar
Matson JB, Grubbs RH (2008) ROMP-ATRP block copolymers prepared from monotelechelic poly(oxa)norbornenes using a difunctional terminating agent. Macromolecules 41:5626– 5631CrossRefGoogle Scholar
Matson JB, Grubbs RH (2010) Monotelechelic poly(oxa)norbornenes by ring-opening metathesis polymerization using direct end-capping and cross-metathesis. Macromolecules 43:213–221CrossRefGoogle Scholar
Çetinkaya S, Yaşar E (2013) Synthesis and catalytic evaluation of a ruthenium alkylidene complex bearing methoxy-pyridine ligand. Appl Catal A: Gen 464–465:136–141CrossRefGoogle Scholar