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Poly(ε-caprolactone)-poly(fluoroalkylene oxide)-poly(ε-caprolactone) block copolymers as surface modifiers of poly(vinyl chloride)

Poly(ε-caprolactone)-poly(fluoroalkylene oxyde)-poly(ε-caprolactone) bloc copolymères en tant que modificateurs de la surface de poly(chlorure de vinyle)

Poly(ε-Caprolacton)-Poly(Fluoroalkylenoxid)-poly(ε-Caprolacton) Block Copolymere als Oberflächen-Veränderer von Polyvinylchlorid

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Surface Coatings International Part B: Coatings Transactions

Summaries

Blends of poly(ε-caprolactone)-poly(fluoroalkylene oxide)-poly(ε-caprolactone) (PCL-PFPE-PCL) triblock copolymers (with different length of PFPE and PCL segments) and poly(vinyl chloride) (PVC) were prepared by casting from tetrahydrofuran solution. DSC analysis revealed a complex morphology deriving from miscibility between PCL and PVC segments. XPS analysis showed strong surface enrichment of PFPE segments for all films prepared. Treatment with a PFPE selective solvent showed that the fraction of PCL-PFPE-PCL removed from surface decreased with increasing length of PCL blocks, indicating an anchorage effect by PCL segments with respect to PVC matrix.

Résumé

Des mélanges de tribloc polymères, poly(caprolactone-b-perfluoropolyéther-b-caprolactone) (PCL-PFPE-PCL) (les segments PFPE ayant une longeur différente de celle des segments PCL) et de poly(chlorure de vinyle) (PVC) ont été préparées par moulage [“casting”] à partir d’une solution de tetrahydrofuran. Une analyse par DSC a révélé une morphologie complexe provenant de la miscibilité entre les segments PCL et PVC. Une analyse XPS a révélé un fort enrichissement de la surface par des segments PFPE dans le cas de tous les feuils préparés. Le traitement par solvant sélectif (PFPE) a démontré que la quantité de PCL-PFPE-PCL enlevé de la surface diminuait au fur et à mesure que la longeur des blocs PCL augmentait, ce qui indiquait qu’il y avait un effet d’ancrage par les segments PCL vis à vis de la matrice PVC.

Zusammenfassung

Mischungen von Poly (Caprolacton-b-Perfluoropolyether-b-Caprolacton) (PCL-PFPE-PCL) Dreiblockcopolymere mit unterschiedlichen Längen der PFPE und PCL Segmente und PVC wurden mittlels einer Tetrahydrofuran-Lösung hergestellt.

Eine DSC Analyse zeigte eine komplexe Morphologie, die sich aus der Mischbarkeit der PCL und PFPE-Segmente ergibt. Eine XPS-Analyse wies darüberhinaus auf, daß sich die Oberfläche aller hergestellten Filme stark mit PFPE angereichert hatte. Die Behandlung mit einem PFPE-spezifischen Lösungsmittel zeigte, daß der Anteil der PCL-PFPE-PCL-Moleküle, der von der Oberfläche entternt wurde, mit zunehmender Länger der PCL-Segmente abnahm. Dies weist darauf hin, das die PCL-Segmente bezüglich der PVC-Matrix einen Ankereffekt haben.

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Messori, M., Toselli, M., Pilati, F. et al. Poly(ε-caprolactone)-poly(fluoroalkylene oxide)-poly(ε-caprolactone) block copolymers as surface modifiers of poly(vinyl chloride). Surface Coatings International Part B: Coatings Transactions 85, 197–201 (2002). https://doi.org/10.1007/BF02699509

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