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Effect of Thermoplastic Elastomer on Melt Rheological and Fracture Behavior of Poly(Lactic Acid) by Ranjana Nehra; S. N. Maiti; Josemon Jacob is a Materials Science article available to read on EtoBox.

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Poly(lactic acid) (PLA) was melt blended with thermoplastic elastomer, maleic anhydride grafted poly[styrene-b-(ethylene-co-butylene)-b-styrene] (SEBS-g-MA) copolymer with varied concentration (10-40 wt. %) using twin screw extruder. Dynamic rheological behaviour of PLA/SEBS-g-MA blends investigated a transition from liquid like behaviour to solid like behaviour in the composition range of 10-20 wt. % of SEBS-g-MA. The capillary rheometer analysis showed enhanced shear viscosity with increase in SEBS-g-MA content. At 10 wt. % of SEBS-g-MA, a maximum in the non-essential work of fracture was observed which reflects resistance to crack propagation. SEM revealed a transition in deformation mechanisms from voids, to fibrillation and cavitation.

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Author

Ranjana Nehra; S. N. Maiti; Josemon Jacob

Publisher

Taylor and Francis Group; Informa UK (Taylor & Francis); Marcel Dekker Inc.; Informa UK Limited (ISSN 0360-2559)

Published

2017

Language

EN

Field

Materials Science (Physical Sciences)