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PVC-silica hybrids: effect of sol–gel conditions on the morphology of silica particles and thermal mechanical properties of the hybrids

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Abstract

Hybrid materials from poly(vinyl chloride) (PVC) and silica have been prepared using different conditions by the sol–gel technique. In situ generation of silica network in the PVC matrix was carried out by hydrolysis/condensation of tetraethoxysilane (TEOS) in the matrix. Morphology of the silica particles produced in hybrid films was studied by scattering electron microscopy. The shape of silica particle produced in the matrix was modified by carrying out the sol–gel process under steam on the hybrid films using TEOS. The films were subjected to strain conditions during this process, which produced lamellar shaped particles in the matrix. It was possible to produce platelet type of structure with different aspect ratio by changing the composition and the stress conditions on the films during the steaming process. Addition of a very small amount of γ-glycidoxypropyltrimethoxysilane as compatibilizer drastically reduced the silica particles size in the matrix to nano-level. Thermal–mechanical properties of some of these hybrids were studied and related to the composition, structure and inter-phase interaction between the silica and the matrix.

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Acknowledgments

The authors wish to acknowledge the financial support provided by the Kuwait University under the project SC03/05. They would also like to appreciate the technical support from the E. M unit and the general facilities projects GS01/01, GS01/05 under the SAF program.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Kuwait University, P.O. Box 5969, Safat, 13060, State of Kuwait

    Fakhreia A. Al-Sagheer & Zahoor Ahmad

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  1. Fakhreia A. Al-Sagheer
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  2. Zahoor Ahmad
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Correspondence to Fakhreia A. Al-Sagheer.

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Al-Sagheer, F.A., Ahmad, Z. PVC-silica hybrids: effect of sol–gel conditions on the morphology of silica particles and thermal mechanical properties of the hybrids. J Sol-Gel Sci Technol 61, 229–235 (2012). https://doi.org/10.1007/s10971-011-2618-1

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  • DOI: https://doi.org/10.1007/s10971-011-2618-1

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