Preparation and compatibilization effect of β-cyclodextrin end-functionalized polystyrene for immiscible PCL/PS blends

Öz

The compatibilizing effect of β-cyclodextrin end-functionalized polystyrene (β-CD-PS) on immiscible PCL/PS blends has been studied using 2D NOESY NMR and DSC techniques. The β-CD-PS was obtained via copper(I)-catalyzed azide-alkyne click reaction (CuAAC) of mono azide functional β-CD (β-CD-N3) and low molecular weight PS as a compatibilizer. The preparation of inclusion complexes based on β-CD and PCL (equimolar ratio) was investigated, aiming to reduce the interfaces of PCLand PS and compatibilizer the immiscible PCL/PS mixture. Compatibilization was visually observed when turbid PCL/PS solutions became clear upon heating and extended stirring. Several solutions were prepared with PCL/PS contents ranging from 100/0, 70/30, 50/50, and 30/70 (wt%) with β-CD-PS contents (equivalent to PCL moles) by solution casting technique. The 30/70 PCL/PS blend containing stoichiometric 1:1 inclusion complex of β-CD and PCL showed significant changes in DSC analysis. Moreover, 2-fold and 4-fold β-CD-PS (stoichiometric 2:1 and 4:1 β-CD:PCL) were tested to 50/50 PCL/PS blends to observe the amount of compatibilizer for obtaining good miscibility.

Anahtar Kelimeler

• Compatibilization
• Solution casting
• CuAAC
• Inclusion complexation

Destekleyen Kurum

Yalova University Scientific Research Unit

Proje Numarası

2019/AP/0020

Teşekkür

The author is grateful to Prof. Dr. Gürkan Hızal, Prof. Dr. Ümit Tunca, and Prof. Dr. Hakan Durmaz to provide the laboratory facilities during the synthesis of the compatibilizer (-CD-PS).

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