Effect of core–shell rubber toughening on mechanical, thermal, and morphological properties of poly(lactic acid)/multiwalled carbon nanotubes nanocomposites. Issue 28 (19th March 2019)

• Record Type: Journal Article
• Authors: Mat Desa, Mohd Shaiful Zaidi; Hassan, Azman; Arsad, Agus; Arjmandi, Reza
• Is Part Of: Journal of applied polymer science. Volume 136:Issue 28(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-03-19
• Subjects: biodegradable -- extrusion -- fullerenes -- graphene -- morphology -- nanotubes -- thermal properties; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.47756
• Languages: English
• ISSNs: 0021-8995

Abstract

ABSTRACT: The effect of core–shell rubber (CSR) toughening on mechanical and thermal properties of poly(lactic acid)/multiwalled carbon nanotubes (PLA/CNT) nanocomposites were investigated. The nanocomposites were prepared by direct melt blending method in a counter‐rotating twin‐screw extruder. The contents of CSR were varied between 5 and 20 wt % while the content of CNT was kept at 5 phr. The extruded samples were injection molded into the desired test specimens for mechanical and thermal properties analysis. The impact strength of PLA/CNT increased with increasing CSR content with concomitant decrease in tensile strength and modulus. Interestingly, the flexural strength increased at low CSR content before decreasing at 15 and 20% content. Differential scanning calorimetry analysis on the second heating cycle shows no crystallinity content for PLA/CNT and all CSR toughened PLA/CNT nanocomposites, while thermogravimetric analysis shows lower thermal degradation of all CSR toughened PLA/CNT as compared to PLA/CNT nanocomposite. This study reveals significant correlation between CSR loading with the mechanical and thermal properties of the nanocomposites. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2019, 136, 47756. Abstract : TEM micrograph of core‐shell rubber toughened PLA/CNT nanocomposites