Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2683
Title: Characterization of poly(vinyl chloride) powder produced by emulsion polymerization
Authors: Atakul Savrık, Sevdiye
Balköse, Devrim
Ulutan, Sevgi
Ülkü, Semra
Atakul Savrık, Sevdiye
Balköse, Devrim
Ülkü, Semra
Izmir Institute of Technology. Chemical Engineering
Keywords: Polyvinyl chlorides
Density
Emulsion polymerization
Ethanol soluble additives
Poly(vinylchloride)
Surface area
Issue Date: Aug-2010
Publisher: Springer Verlag
Source: Atakul Savrık, S., Balköse, D., Ulutan, S., and Ülkü, S. (2010). Characterization of poly(vinyl chloride) powder produced by emulsion polymerization. Journal of Thermal Analysis and Calorimetry, 101(2), 801-806. doi:10.1007/s10973-010-0942-2
Abstract: The effect of emulsion process formulation ingredients on the morphology, structure, and properties of polyvinyl chloride (PVC) powder has been considered in this study. PVC powder was extracted with ethanol and films were obtained by solvent casting from tetrahydrofurane. Characterization of powders, films, and ethanol extract was performed through FTIR spectroscopy, DSC, AFM, SEM, EDX analysis, methylene blue, and nitrogen adsorption. PVC powder was composed of spheres of a large particle size range from 10 nm to 20 μm as shown by SEM. The specific surface area of the PVC powder was determined as 16 and 12 m 2 g-1 from methylene blue adsorption at 25 °C and from N2 adsorption at -196 °C, respectively. AFM indicated the surface roughness of the films obtained by pressing the particles was 25.9 nm. Density of PVC powder was determined by helium pycnometry as 1.39 g cm -3. FTIR spectroscopy indicated that it contained carbonyl and carboxylate groups belonging to additives such as surface active agents, plasticizers, and antioxidants used in production of PVC. These additives were 1.6% in mass of PVC as determined by ethanol extraction. EDX analysis showed PVC particles surfaces were coated with carbon-rich materials. The coatings had plasticizer effect since, glass transition temperature was lower than 25 °C for PVC powder and it was 80 °C for ethanol extracted powders as found by using differential scanning calorimetry. These additives from polymerization process made PVC powder more thermally stable as understood from Metrom PVC thermomat tests as well. © 2010 Akadémiai Kiadó, Budapest, Hungary.
URI: http://doi.org/10.1007/s10973-010-0942-2
http://hdl.handle.net/11147/2683
ISSN: 1388-6150
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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