Investigating the electrical conductivity of PMMA/ carbon black and of PS/PMMA/ carbon black blends prior to and after shear

Voigt M, Pan Y, Liu XH, Schubert DW (2016)

Publication Language: English

Publication Type: Conference contribution, Abstract of a poster

Publication year: 2016

Pages Range: 142

Conference Proceedings Title: Book of Abstracts

Event location: Thessaloniki, GR

Abstract

The electrical conductivity of disk-like poly(methyl methacrylate)/carbon black (PMMA/CB) composite samples with
 
various CB concentrations as a function of the position was investigated prior to and after a shear process. Novel
 
electrical conductivity maps of the samples were obtained. It was found that the electrical conductivity from angular
 
averaging of static samples is independent of the radius regardless of the CB concentrations but strongly
 
dependent for sheared samples with varied CB concentrations. 1 Additionally, CB filled polystyrene (PS) and PMMA
 
blends with different PS/PMMA ratio have been fabricated by melt blending to obtain conductive polymer
 
composites with a low electrical percolation threshold. The electrical conductivity of the composites was highest
 
when PS and PMMA phases form a co-continuous structure and CB particles were selectively located and
 
percolated in the PS phase. Moreover, the simultaneous evolution of electrical conductivity and phase morphology
 
of CB filled co-continuous PS/PMMA (50v/50v) composites was investigated under shear and quiescent melt.
 
Under shear stress, the conductivity of these blends decreased by about two orders of magnitude and the phase
 
morphology changed into a strip structure 2 . Impact of shear on the phase morphology become less significant as
 
CB concentration increased or shear stress decreased. During subsequent recovery, pronounced phase structure
 
coarsening and conductivity increase were observed in the systems. The results obtained in this study provide a
 
deeper insight into phase structural and conductivity changes in conductive polymer composite induced by shear
 
deformation.
 
1. X. Liu, J. Krückel, G.Q. Zheng, D.W. Schubert, ACS Appl. Mater. Interfaces 2013, 5, 8857
 
2. Y. Pan, X. Liu, X. Hao, Z. Starý, D.W. Schubert, Europ. Polym. J. 78 (2016) 106–115

Authors with CRIS profile

Monika Voigt Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe) (LSP) Yamin Pan Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe) (LSP) Xian Hu Liu Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe) (LSP) Dirk Schubert Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe) (LSP)

How to cite

APA:

Voigt, M., Pan, Y., Liu, X.H., & Schubert, D.W. (2016). Investigating the electrical conductivity of PMMA/ carbon black and of PS/PMMA/ carbon black blends prior to and after shear. Poster presentation at 9 th International Symposium on Flexible Organic Electronics (ISFOE16), Thessaloniki,, GR.

MLA:

Voigt, Monika, et al. "Investigating the electrical conductivity of PMMA/ carbon black and of PS/PMMA/ carbon black blends prior to and after shear." Presented at 9 th International Symposium on Flexible Organic Electronics (ISFOE16), Thessaloniki, 2016.

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