Synthesis and characterization of polypyrrole/montmorillonite and polypyrrole/polypropylene compdsites

Download

index.pdf

Date

2007

Author

Börüban, Çetin

Metadata

Show full item record

Item Usage Stats

210
views

293
downloads

In this study, organo-montmorillonite (OMMT) nanocomposites containing 1%, 5%, 10% and 15% OMMT were prepared by in situ intercalative oxidative polymerization of pyrrole in the presence of OMMT. Thermal and morphological properties of the Polypyrrole(PPy)/OMMT nanocomposites were investigated by Thermal Gravimetric Analysis (TGA), X-ray Diffraction Analysis (XRD) and Scanning Electron Microscope (SEM). Electrical conductivities of composites were measured by four probe technique. Formation of PPy and its incorporation in PPy/OMMT composites were confirmed by FTIR analysis. TGA results showed that PPy/OMMT composites have outstanding thermal stability compared to that of PPy. XRD analysis revealed intercalation of PPy in the OMMT lamelles. Scanning electron micrographs demonstrated that the morphology of the PPy/OMMT nanocomposites differ slightly from that of the clay, since the modification of PPy was not significant in flaky structure of OMMT nanoparticles. Conductivity values of PPy/OMMT composites were found in the order of 10-3S/cm. Since PPy has poor processibility, Polypropylene(PP)/PPy composites were prepared in the composition range of 2-20 % PPy. Mechanical properties were investigated by tensile tests. Electrical conductivities were measured by four probe technique. Morphological characterizations were made by SEM. Young’s Modulus of PPy/PP composites increased with increasing PPy content, and addition of 2 wt % PPy to PP resulted in a dramatic decrease in the tensile strain at break of the material. Also by addition of 2 wt % PPy to PP, the tensile strength of material decreased and further increase in PPy content, tensile strength increased. Furthermore, an increase in the PPy content in PPy/PP composites resulted in an increase in conductivity. SEM micrographs revealed that as the PPy loading increases from 10% to 20% in composite system, adhered PPy particles by PP matrix were driven out of PP matrix while PP matrix oriented along the draw direction during tensile test.

Subject Keywords

Polymers., Montmorillonite.

URI

http://etd.lib.metu.edu.tr/upload/2/12608574/index.pdf
https://hdl.handle.net/11511/16878

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Synthesis and Stimuli-Responsive Properties of Metallo-Supramolecular Phosphazene Polymers Based on Terpyridine Metal Complexes Sezer, Selda; KÖYTEPE, SÜLEYMAN; GÜLTEK, AHMET; SEÇKİN, TURGAY (2021-08-01) In this study, terpyridine functionalized phosphazene based metallo-supramolecular polymers were synthesized by three step reaction method. In the first step, 4 '-(4-aminophenyl)-2,2 ':6 ',2 ''-terpyridine was synthesized with p-nitro benzaldehyde and 2-acetylpyridine. Then, the monomer containing six terpyridine (TPY) units attached to the phosphazene was prepared from 4 '-(4-aminophenyl)-2,2 ':6 ',2 ''-terpyridine and hexachlorocyclotriphosphazene by a condensation reaction. Finally, metallo-supramolecula...
Synthesis and characterization of poly(dihalophenylene oxide)s and its derivatives from diammine bis(trihalophenolato) Cu(II) complexes Sonsuz, Muammer; Gökağaç Arslan, Gülsün; Department of Chemistry (2004) In this study, synthesis and characterization of poly(dihalophenylene oxide)s were done by thermal decomposition of diamminebis(trichlorophenolato) copper(II) and diamminebis(tribromophenolato) Cu(II) complexes in solid state. 2,4,6-trichlorophenol (TCP), 2,4,6-tribromophenol (TBP) and ammonia were used as ligands in the complex syntheses. The complexes were characterized by means of X-ray diffraction, FTIR, DSC, mass spectroscopy, magnetic susceptibility and C, H, N elemental analyses. Synthesized complexe...
Synthesis and characterization of polystyrene clay nanocomposites Özden, Gülsüm; Yılmazer, Ülkü; Department of Chemical Engineering (2004) This study was undertaken to prepare polystyrene (PS)/montmorillonite (MMT) nanocomposites by different methods, including melt intercalation, in-situ polymerization and masterbatch methods. The in-situ polymerization method consisted of dispersing the styrene monomer into the galleries of MMT followed by subsequent polymerization. The PS/MMT nanocomposites formed by melt intercalation method were prepared on a twin-screw extruder. The masterbatch method was in fact a two-step process. As the first step, a ...
Preparation of conductive polybenzoxazines by oxidative polymerization Kiskan, Baris; Yagci, Yusuf; Sahmetlioglu, Ertugrul; Toppare, Levent Kamil (Wiley, 2007-03-15) precursors were prepared by oxidative polymerization 3-phenyl-3,4-dihydro-2H-benzo[e][1,3] oxazine (P-a) alone and in the presence of thiophene (Th) with ceric ammonium nitrate in acetonitrile. The structure of the precursors was confirmed by FTIR, H-1 NMR, and DSC measurements, indicating the presence of a cyclic benzoxazine structure, together with small but varying amount of a ring opened phenolic structure. The resulting polymers exhibit conductivities around 10(-2) S cm(-1) and undergo thermal curing a...
Synthesis of conducting block copolymers and their use in the immobilization of invertase and polyphenol oxidase enzyme Kıralp, Senem; Kıralp, Senem; Department of Chemistry (2004) A new thiophene derivative containing menthyl group (MM) was synthesized and polymerized via chemical and electrochemical methods. Polymers obtained and MM itself were used to synthesize copolymers with pyrrole under conditions of constant potential electrolysis. Cyclic Voltammetry, thermal analysis and scanning electron microscopy analyses were performed for the characterization of samples. Immobilization of invertase and polyphenol oxidase enzymes was performed in the matrices obtained via copolymerizatio...

Citation Formats

Ç. Börüban, “Synthesis and characterization of polypyrrole/montmorillonite and polypyrrole/polypropylene compdsites,” M.S. - Master of Science, Middle East Technical University, 2007.