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Polymers 2017, 9(4), 145; doi:10.3390/polym9040145

Synthesis, Characterization and Thermal Properties of Poly(ethylene oxide), PEO, Polymacromonomers via Anionic and Ring Opening Metathesis Polymerization

1
Laboratory of Industrial Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece
2
Laboratory of Bioinorganic Chemistry, Department of Chemistry, University of Crete, Voutes Campus, 71003 Heraklion, Greece
*
Author to whom correspondence should be addressed.
Academic Editor: Changle Chen
Received: 14 March 2017 / Revised: 7 April 2017 / Accepted: 18 April 2017 / Published: 21 April 2017
(This article belongs to the Special Issue Metal Complexes-Mediated Catalysis in Polymerization)
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Abstract

Branched polymers are a valuable class of polymeric materials. In the present study, anionic polymerization techniques were employed for the synthesis of low molecular weight poly(ethylene oxide) (PEO) macromonomers bearing norbornenyl end groups. The macromonomers were characterized by SEC, MALDI-TOF and NMR spectroscopy. Subsequent ring opening metathesis polymerization (ROMP) of the macromonomers using ruthenium catalysts (Grubbs catalysts of the 1st, 2nd and 3rd generations) afforded the corresponding polymacromonomers. The effects of the macromonomer molecular weight, the type of the catalyst, the nature of the solvent, the monomer concentration and the polymerization temperature on the molecular characteristics of the branched polymers were examined in detail. The crystallization behavior of the macromonomers and the corresponding polymacromonomers were studied by Differential Scanning Calorimetry (DSC). The thermal stability and the kinetics of the thermal decomposition of the samples were also studied by Thermogravimetric Analysis (TGA). The activation energies of the thermal decomposition were analyzed using the Ozawa–Flynn–Wall and Kissinger methodologies. View Full-Text
Keywords: anionic polymerization; ring opening metathesis polymerization (ROMP); polymacromonomers; macromonomers; poly(ethylene oxide); norbornene; Grubbs catalyst anionic polymerization; ring opening metathesis polymerization (ROMP); polymacromonomers; macromonomers; poly(ethylene oxide); norbornene; Grubbs catalyst
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Theodosopoulos, G.V.; Zisis, C.; Charalambidis, G.; Nikolaou, V.; Coutsolelos, A.G.; Pitsikalis, M. Synthesis, Characterization and Thermal Properties of Poly(ethylene oxide), PEO, Polymacromonomers via Anionic and Ring Opening Metathesis Polymerization. Polymers 2017, 9, 145.

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