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Maghnite-H+ as Inorganic Acidic Catalyst in Ring Opening Polymerization of Dodecamethylcyclohexasiloxane

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Abstract

A new procedure for synthesizing a dimethyl siloxane polymer is addressed in the present work, which is based on the use of Maghnite-H+ as a green and environmentally friendly catalyst in the polymerization of dodecamethylcyclohexasiloxane (D6). The Maghnite-H+ is natural smectite clay, activated by a strong acid, sulfuric acid is generally the most used. The impact of acid activation appears in increasing the basal spacing of the Maghnite, it is confirmed by XRD analysis. The solvent-free polymerization of D6 by cationic route using the Maghnite-H+ has been made, the product obtained was characterized by different methods of analysis as IR, 1H NMR, 13C NMR and GPC. Temperature, time and mass content of catalyst were optimized so to obtain a yield and an average molecular mass large enough and without cyclic structures. Also, the thermal behavior of the polymer was investigated by DSC. At the end, a reaction mechanism was proposed which describes in detail the role played by the Maghnite-H+ during the various stages of the reaction.

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Authors and Affiliations

  1. Laboratory of Polymer Chemistry, Department of Chemistry, Faculty of Exact and Applied Sciences, University of Oran 1 Ahmed Ben Bella, BP 1524 El’Menouer, Oran, 31000, Algeria

    Djamal Eddine Kherroub, Mohammed Belbachir & Larbi Bouhadjar

  2. University Centre of Relizane Ahmed Zabana, Institute of Sciences and Technology, Relizane, BP, 48000, Algeria

    Djamal Eddine Kherroub, Mohamed Khodja & Ahmed Boucherdoud

  3. Laboratory of Macromolecular Chemistry, Polytechnic Military School (EMP), Bordj El Bahri, 16111, Algiers, Algeria

    Saad Lamouri

Authors
  1. Djamal Eddine Kherroub
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  2. Mohamed Khodja
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  3. Mohammed Belbachir
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  4. Saad Lamouri
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  5. Larbi Bouhadjar
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  6. Ahmed Boucherdoud
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Correspondence to Djamal Eddine Kherroub.

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Kherroub, D.E., Khodja, M., Belbachir, M. et al. Maghnite-H+ as Inorganic Acidic Catalyst in Ring Opening Polymerization of Dodecamethylcyclohexasiloxane. Silicon 11, 1165–1173 (2019). https://doi.org/10.1007/s12633-018-9769-4

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  • DOI: https://doi.org/10.1007/s12633-018-9769-4

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