Measuring interphase stiffening effects in styrene-based polymeric thin films

Autor:	L. Catherine Brinson, Karl W. Putz, Craig Burkhart, John M. Torkelson, Charles D. Wood, Lawrence Chen
Rok vydání:	2015
Předmět:	chemistry.chemical_classification Materials science Polymers and Plastics Organic Chemistry Polymer Nanoindentation Viscoelasticity Styrene Nanomaterials chemistry.chemical_compound chemistry Materials Chemistry Interphase Composite material Thin film Glass transition
Zdroj:	Polymer. 75:161-167
ISSN:	0032-3861
DOI:	10.1016/j.polymer.2015.08.033
Popis:	Incorporating fairly low volume fractions of nanomaterials into polymers creates composites with a vast amount of interfacial area for potential matrix–filler interactions. This surface area provides interfaces between the polymer matrix and the filler at which polymer chains are physically and, potentially, chemically constrained, affecting the local mobility of the polymer chains. In this study, we investigate the properties of this interphase region in several styrene-based polymers and carbon surfaces via model thin film systems. We employ dynamic nanoindentation to probe viscoelastic interphase enhancements in supported thin films for four different polymers with a wide range of glass transition temperatures. The results demonstrate that interphase enhancements depend upon the nature of the substrate/polymer interaction and the average mobility of the polymer, glassy or rubbery. We hypothesize that strongly positive interactions between styrene and graphitic surfaces through pi–pi secondary interactions at the interface create the interphase enhancements we measure and quantify.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::15020e610e7d0a675245f64780020c2f https://doi.org/10.1016/j.polymer.2015.08.033 Zobrazit plný text záznamu Full Text from ScienceDirect