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Breakup behavior of nanolayers in polymeric multilayer systems — Creation of nanosheets and nanodroplets

Article dans une revue avec comité de lecture
Author
FENG, Jingxing
365163 Case Western Reserve University [Cleveland]
BAER, Eric
365163 Case Western Reserve University [Cleveland]
OLAH, Andrew
365163 Case Western Reserve University [Cleveland]
SOLLOGOUB, Cyrille
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
300351 Conservatoire National des Arts et Métiers [CNAM] [CNAM]
MIQUELARD-GARNIER, Guillaume
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
300351 Conservatoire National des Arts et Métiers [CNAM] [CNAM]
GUINAULT, Alain
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
300351 Conservatoire National des Arts et Métiers [CNAM] [CNAM]
BIRONEAU, Adrien
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
ZHANG, Ziyou
365163 Case Western Reserve University [Cleveland]

URI
http://hdl.handle.net/10985/13811
DOI
10.1016/j.polymer.2018.03.049
Date
2018
Journal
Polymer

Abstract

Multilayer films comprising polystyrene (PS)/polymethyl methalcrylate (PMMA) and PS/polycaprolatone (PCL) alternating nanolayers with varied layer thickness were fabricated by multilayer coextrusion. The nanolayers breakup phenomena of PMMA and PCL were characterized using atomic force microscopy (AFM), oxygen permeability, light transmission, wide-angle X-ray scattering (WAXS), and differential scanning calorimetry (DSC). The continuous layers started to break up into nanosheets and nanodroplets during the coextrusion process when the nominal layer thickness decreased to between 30 nm and 40 nm. Further decrease of the nominal layer thickness of PMMA and PCL resulted in less nanosheets and more nanodroplets. Oxygen permeability was effective for characterizing the onset thickness of layer breakup. The oxygen permeability for the PS/PCL system was modeled and demonstrated good correlation with estimated composition of continuous layers, nanosheets, and nanodroplets.

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