Melt rheological properties of PBT/SEBS and reactively compatibilized PBT/SEBS/SEBS‐g‐MA polymer blends. Issue 5 (13th September 2014)

• Record Type: Journal Article
• Authors: Sharma, Rajul; Maiti, Saurindra Nath
• Is Part Of: Journal of applied polymer science. Volume 132:Issue 5(2015:Mar. 05)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2014-09-13
• Subjects: Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.41402
• Languages: English
• ISSNs: 0021-8995

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>Melt rheological properties of PBT/SEBS and PBT/SEBS/SEBS‐<italic>g</italic>‐MA blends at SEBS volume fraction (Φ_d) = 0.00–0.38 were studied at 240°C, 250°C and 260°C using a capillary rheometer. The compatibilizer SEBS‐<italic>g</italic>‐MA addition resulted in significant reduction in the dynamic interfacial tension which in turn led to increased phase adhesion. The power law exponent n decreased with increasing Φ_d and increasing temperature for both the compatiblized and uncompatiblized blends. The consistency index of PBT/SEBS increased with increasing Φ_d but were smaller than those of PBT/SEBS/SEBS‐<italic>g</italic>‐MA blends. Melt elasticity such as die swell and first normal stress difference increased with Φ_d. Variations of first normal stress coefficient function (ψ₁), recoverable shear strain (γ_R), relaxation time (λ), and shear compliance (J_c) values versus shear rate were analyzed. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. <bold>2015</bold>, <italic>132</italic>, 41402.</p> </abstract>