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Viscoelastic and thermal behaviour of partially compatible polymer blends polycarbonate/tetramethylpolycarbonate

✍ Scribed by C. Belaribi; G. Marin; Ph. Monge

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
378 KB
Volume
22
Category
Article
ISSN
0014-3057

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✦ Synopsis

Differential scanning calorimetry (DSC) and thermomechanical analysis (TMA) measurements show that, in the case of polycarbonate (PC) with tetramethylpolycarbonate (MPC), the homopolymers are miscible up to 70% PC weight fraction; at higher PC content, an additional PC phase appears. The partial miscibility of PC and MPC has been confirmed by ultrasonic attenuation measurements and scanning electron microscopy. The viscoelastic behaviour of these blends has been correlated with the blend composition and compatibility. The free volume contraction, found to explain the variations of glass transition temperature and viscosity with concentration, suggests strong intermolecular interaction in the compatible range.

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