Poly(ε-caprolactone-b-perfluoropolyether-b-ε-caprolactone) (PCL-PFPE-PCL) triblock copolymers having hydroxy end groups were readily functionalised with triethoxysilane end groups by reactions with 3-isocyanatopropyltriethoxysilane. Organic-inorganic hybrids were prepared by using the sol-gel process in the presence of tetraethoxysilane and hydroxy or triethoxysilane terminated PCL-PFPE-PCL. Fully transparent hybrid materials with high content of organic matter were obtained only in the case of alkoxysilane functionalised copolymers. For such systems the PCL-PFPE-PCL copolymer was so intimately mixed with the inorganic network to prevent crystallisation of the PCL segments. The progress of the sol-gel reaction was limited by the early vetrification of the reactive system, while the interpenetration of the organic phase was enhanced by curing the samples at 100 °C. © 2002 Elsevier Science Ltd. All rights reserved.

Messori M., Toselli M., Pilati F., Mascia L., Tonelli C. (2002). Synthesis and characterisation of silica hybrids based on poly(ε-caprolactone-b-perfluoropolyether-b-ε-caprolactone). EUROPEAN POLYMER JOURNAL, 38(6), 1129-1136 [10.1016/S0014-3057(01)00295-6].

Synthesis and characterisation of silica hybrids based on poly(ε-caprolactone-b-perfluoropolyether-b-ε-caprolactone)

Toselli M.;
2002

Abstract

Poly(ε-caprolactone-b-perfluoropolyether-b-ε-caprolactone) (PCL-PFPE-PCL) triblock copolymers having hydroxy end groups were readily functionalised with triethoxysilane end groups by reactions with 3-isocyanatopropyltriethoxysilane. Organic-inorganic hybrids were prepared by using the sol-gel process in the presence of tetraethoxysilane and hydroxy or triethoxysilane terminated PCL-PFPE-PCL. Fully transparent hybrid materials with high content of organic matter were obtained only in the case of alkoxysilane functionalised copolymers. For such systems the PCL-PFPE-PCL copolymer was so intimately mixed with the inorganic network to prevent crystallisation of the PCL segments. The progress of the sol-gel reaction was limited by the early vetrification of the reactive system, while the interpenetration of the organic phase was enhanced by curing the samples at 100 °C. © 2002 Elsevier Science Ltd. All rights reserved.
2002
Messori M., Toselli M., Pilati F., Mascia L., Tonelli C. (2002). Synthesis and characterisation of silica hybrids based on poly(ε-caprolactone-b-perfluoropolyether-b-ε-caprolactone). EUROPEAN POLYMER JOURNAL, 38(6), 1129-1136 [10.1016/S0014-3057(01)00295-6].
Messori M.; Toselli M.; Pilati F.; Mascia L.; Tonelli C.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/899718
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