Investigation on shear induced isothermal crystallization of poly (lactic acid) nanocomposite based on graphene

Reghat, M, Ghasemi, I, Farno, E, Azizi, H, Namin, P and Karrabi, M 2017, 'Investigation on shear induced isothermal crystallization of poly (lactic acid) nanocomposite based on graphene', Soft Materials, vol. 15, no. 1, pp. 103-112.


Document type: Journal Article
Collection: Journal Articles

Title Investigation on shear induced isothermal crystallization of poly (lactic acid) nanocomposite based on graphene
Author(s) Reghat, M
Ghasemi, I
Farno, E
Azizi, H
Namin, P
Karrabi, M
Year 2017
Journal name Soft Materials
Volume number 15
Issue number 1
Start page 103
End page 112
Total pages 10
Publisher Taylor and Francis
Abstract In this study, the isothermal crystallization of poly (lactic acid) (PLA) and its graphene-based nanocomposites (containing 0.5, 1, 2, and 3 wt% of graphene nanoplatelets-GNp) was studied at 135°C under quiescent and different presheared conditions (0.1, 0.3, 0.5, 1.1, and 1.8 s for 60s). Induction time of crystallization was determined from the plot of storage modulus versus time in time sweep test. Results showed that increase in GNp content decreased the induction time significantly. The preshear flow did not significantly affect the induction time of PLA containing 0.5 wt% of GNp and neat PLA. However, an increase in the intensity of preshear for graphene-based nanocomposites containing 1, 2, and 3 wt% of GNp first decreased the induction time and then increased it. The induction time also decreased with increase in the duration of shear flow.
Subject Materials Engineering not elsewhere classified
Keyword(s) Graphene
nanocomposites
poly (lactic acid)
rheology
shear-induced crystallization
DOI - identifier 10.1080/1539445X.2016.1268624
Copyright notice © 2017 Taylor & Francis.
ISSN 1539-445X
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