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Anionic polymerization of styrene oxide
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093302.pdf
Date
2000
Author
Güler, Hakan
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https://hdl.handle.net/11511/6726
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Graduate School of Natural and Applied Sciences, Thesis
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In this work, phenylisocyanate was polymerized in bulk and in a solution of THF by the complex base (CB), NaNH2/(CH3)(3)CONa catalyst under vacuum. The percent yield for bulk polymerization at -20 degreesC first increased with a slow rate reaching 32% conversion in 3 hours, then with a greater rate up to 86% in 6 hours. However, at 0 degreesC the yields were relatively smaller and not very reproducible. The product obtained was a high molecular weight polymer, insoluble in most solvents, and partially cryst...
ANIONIC SYNTHESIS AND CHARACTERIZATION OF POLY(4-VINYLPYRIDINE)-POLY(DIMETHYLSILOXANE) BLOCK COPOLYMERS
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Poly(4-vinylpyridine)-b-Poly(dimethylsiloxane) (P4VP-b-PDMS) copolymers have been synthesized by sequential anionic polymerization of 4VP and hexamethylcyclotrisiloxane at - 70-degrees-C. The initiator was sodium naphthenate. The solvent used during reactions has a very critical role in an homogeneous polymerization medium. A 1:1 pyridine/THF mixture was found to be the most suitable. The products were characterized by H-1-NMR spectroscopy, transmission electron microscopy (TEM) and differential scanning ca...
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H. Güler, “Anionic polymerization of styrene oxide,” Middle East Technical University, 2000.