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Effect of a triblock PCL-PDMS-PCL copolymer on the properties of immiscible poly(vinyl chloride)/poly(2-ethylhexyl acrylate) blends

✍ Scribed by Okşan Karal; E. Elif Gürel Hamurcu; Bahattin M. Baysal

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
999 KB
Volume
199
Category
Article
ISSN
1022-1352

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✦ Synopsis

Miscibility, thermal, mechanical and morphological properties of poly(viny1 chloride)/poly(2ethylhexyl acrylate), (PVC/PEHA) blends containing 1 -10 wt.-% of the triblock copolymer polycaprolactone-bZock-poly(dimethylsiloxane)-bZoc~-polycaprolactone (PCL-PDMS-PCL, Tegomer) were investigated by several techniques. Binary blends of PVC/PEHA are found to be immiscible according to differential scanning calorimetry and viscosity measurements. The effect of Tegomer addition on the properties of blends was examined. Ternary blends of PVC/PEHA/Tegomer exhibited a single Tg behaviour and viscosity measurements indicate some compatibility. Stress-strain results showed that Tegomer has a synergetic effect on the flexibility of the blends. FTIR analysis confirms the specific interactions between the components in ternary blends of PVC/PEHA/Tegomer. Morphological properties of the blends were examined by scanning electron microscopy.

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