Miscibility in thermoplastic polyurethane elastomer/poly(styrene-co-acrylonitrile) blends
| Autor: | B. Žerjal, T. Malavas̆ic̆, Ž. Jelčić |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1996 |
| Předmět: |
Materials science
Polymers and Plastics Organic Chemistry General Physics and Astronomy Elastomer Miscibility Dielectric spectroscopy Thermoplastic polyurethane Differential scanning calorimetry Materials Chemistry Copolymer Polymer blend Blends thermoplastic polyurethane poly(styrene-co-acrylonitrile) dielectric spectroscopy Composite material Glass transition |
| Popis: | Blends of a thermoplastic polyurethane (TPU) with poly(styrene-co-acrylonitrile) (SAN) were investigated by differential scanning calorimetry (DSC) and dielectric spectroscopy. Blends were prepared by kneading. A shift of the glass transition temperatures ( T g ) and specific heat increments ( ΔC p ) at the T g have shown that SAN dissolves more in the TPU-rich phase than TPU in the SAN-rich phase. From dielectric measurements it could be concluded that the relaxation processes in the TPU/SAN blends occur at the same temperatures as the relaxation processes in pure components, which suggests that the motions of TPU chains are decoupled from the motions of SAN chains. The addition of TPU to SAN copolymer causes a plasticizing effect at very low concentrations. |
| Databáze: | OpenAIRE |
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