ANIONIC SYNTHESIS AND CHARACTERIZATION OF POLY(4-VINYLPYRIDINE)-POLY(DIMETHYLSILOXANE) BLOCK COPOLYMERS

Date

1993-01-01

Author

NUGAY, N
KUCUKYAVUZ, Z
KUCUKYAVUZ, S

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

125
views

0
downloads

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 calorimetry (DSC) techniques. All the results indicated the formation of 4-vinylpyridine-siloxane block copolymers. Also, the P4VP blocks can be completely quaternized with methyl iodide as indicated by H-1-NMR and FTIR spectroscopies.

Subject Keywords

Polymers and Plastics

URI

https://hdl.handle.net/11511/66372

Journal

POLYMER INTERNATIONAL

DOI

https://doi.org/10.1002/pi.4990320115

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

CONDUCTIVE PROPERTIES OF POLY(4-VINYLPYRIDINE) POLY(DIMETHYLSILOXANE) BLOCK-COPOLYMERS DOPED WITH TETRACYANOQUINODIMETHANE NUGAY, N; KUCUKYAVUZ, Z; KUCUKYAVUZ, S (Elsevier BV, 1993-01-01) Poly(4-vinylpyridine)-poly(dimethylsiloxane) (P4VP-PDMS) block copolymers with various compositions were prepared by anionic polymerization. The 4VP block was quaternized with methyl iodide and reacted with 7,7',8,8'-tetracyanoquinodimethane (TCNQ), which is in both anion radical (TCNQ-.) and neutral form (TCNQ0). The products were then characterized by H-1 nuclear magnetic resonance and Fourier-transform infra-red spectroscopy, scanning electron microscopy and differential scanning calorimetry techniques. ...
ANIONIC SYNTHESIS OF POLY(METHYLMETHACRYLATE)-POLY(4-VINYLPYRIDINE) DIBLOCK COPOLYMERS IN THE PRESENCE OF LICL NUGAY, N; HOSOTTE, C; NUGAY, T; RIESS, G (Elsevier BV, 1994-10-01) Poly(methylmethacrylate)-poly(4-vinylpyridine) diblock copolymers were synthesized by sequential anionic polymerization. 1,1-diphenyl-3-methylpentyllithium was used as initiator and LiCl was added to the system as ligand to modify both initiator and active chain end in order to avoid side reactions. The products were characterized by H-1-NMR spectroscopy, size exclusion chromatography and differential scanning calorimetry. The block copolymers show narrow molecular weight distribution and microphase separat...
SPECTRAL CHARACTERIZATION AND THERMAL-BEHAVIOR OF CROSS-LINKED POLY(HYDROXYETHYLMETHACRYLATE) BEADS PREPARED BY SUSPENSION POLYMERIZATION KIREMITCI, M; CUKUROVA, H; Özkar, Saim (Wiley, 1993-01-01) Crosslinked poly(hydroxyethylmethacrylate) [poly(HEMA)] beads were prepared by the suspension copolymerization of 2-hydroxyethylmethacrylate monomer with ethyleneglycol dimethacrylate (EGDMA) in aqueous media which contained only magnesium oxide (MgO) as a suspension stabilizer and also salting-out agent. The procedure gives spherical particles with narrow size distribution. The reaction mechanism, composition and structure of poly(HEMA) beads were studied by solid-state C-13 CP/MAS NMR, FTIR, ESCA, and ele...
Pyramidalized double bonds containing endoperoxide linkages: Photooxygenation of dimethyl cis-3,8-dihydroheptalene-3,8-dicarboxylate Saracoglu, N; Menzek, A; Sayan, S; Salzner, U; Balcı, Metin (1999-09-03) Diels-Alder cyclo;addition utilizing singlet oxygen as the dienophile with dimethyl cis-3,8-dihydraheptalene-3,8-dicarboxylate (5) has been investigated, and monoaddition product 7 has been isolated. The addition of a second singlet oxygen to the cycloheptatriene unit in 7 gave syn-bis(norcaradiene) bis(endoperoxide) 4. H-1 NMR spectral studies and theoretical calculations indicate the increased pyramidalization in syn-4 compared with carbon analogue. The increased pyramidalization results from hyperconjuga...
Dipole moments of some styrene copolymers Küçükyavuz, Zühal; Baysal, Bahattin (American Chemical Society (ACS), 1988-7) Dipolemomentsofpoly(styrene-co-p-chlorostyrene),poly(styrene-co-p-methoxystyrene),poly(styrene-co-4-vinylpyridine),andpoly(styrene-co-N-vinylcarbazole)copolymersweredeterminedintoluenesolutionsatdifferenttemperatures.Thesamplesweresynthesizedbyusingfree-radicalinitiators.Theeffectsofthenatureofthepolargroup,composition,andtemperatureonthedipolemomentratiowereinvestigated.Themean-squaredipolemomentperstructuralunitshowsapositivedeviationfromlinearity,inagreementwithcalculationsbyMarkbasedonrotationalisomeric...

Citation Formats

N. NUGAY, Z. KUCUKYAVUZ, and S. KUCUKYAVUZ, “ANIONIC SYNTHESIS AND CHARACTERIZATION OF POLY(4-VINYLPYRIDINE)-POLY(DIMETHYLSILOXANE) BLOCK COPOLYMERS,” POLYMER INTERNATIONAL, pp. 93–96, 1993, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66372.