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Organic-Inorganic Hybrid Material Synthesis by on Line Coupling Twin Screw Extruder with a Microwave Oven

  • S. Jiguet , V. Bounor-Legaré , F. Melis and A. Michel
Published/Copyright: March 3, 2022
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Abstract

A new process for elaborating continuously organic-inorganic hybrid materials by reactive extrusion is presented. This synthesis consists in formulating a copolymer of ethylene and vinyl acetate (EVA)/tetrapropoxysilane (TPOS or Si(OC3H7)4)/catalyst blend by a corotating twin screw extruder followed by two successive reaction steps: on line microwave crosslinking reaction and hydrolysis-condensation reactions leading to a silica network cografted onto the organic matrix.

Extrusion feed rate (Q), temperature, microwave oven power (P), and microwave curing time (tmw) were studied. Crosslinking density was evaluated before and after hydrolysis-condensation reactions and compared with the previous results obtained in static conditions. These materials tailored by an on line process present a permanent elasticity at high temperature (up to 200 °C) and a certain optical transparency. This new approach offers the possibility to synthesize massive samples based on organic-inorganic hybrid material.


V. Bounor-Legaré, Laboratoire des Matériaux Polymères et des Biomatériaux, Bât. ISTIL Université Claude Bernard Lyon 1, UMR CNRS 5627 17, Boulevard Latarjet, 69622 Villeurbanne cedex (France)


Acknowledgements

The authors wish to thank Dr. M. Delmotte from the “Laboratoire de microstructure et mécanique des matériaux” for the time dedicated to dielectric analysis and Pr. Ph. Cassagnau for his fruitful discussions.

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Received: 2004-06-30
Accepted: 2005-06-02
Published Online: 2022-03-03

© 2005 Hanser Publishers, Munich

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