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The Effect of Carbon Black and Colloidal Silica Fillers on the Fracture Toughness at Polymethylmethacrylate Interfaces

Published online by Cambridge University Press:  17 March 2011

Mordechai J. Bronner ,
Anshul A. Shah ,
Hyun-Joong Kim ,
Dennis G. Peiffer ,
Miriam Rafailovich  and
Jonathan Sokolov
Mordechai J. Bronner
Affiliation:
Rambam Mesivta High School, 15 Frost Lane, Lawrence NY, 11559
Anshul A. Shah
Affiliation:
Ward Melville High School, 380 Old Town Rd., East Setauket, NY 11733
Hyun-Joong Kim
Affiliation:
School of Biological Resources and Materials Engineering, Seoul National University, Suwon 441-744, Korea
Dennis G. Peiffer
Affiliation:
Exxon Mobil Research and Engineering, Annandale, NJ
Miriam Rafailovich
Affiliation:
Department of Materials Science & Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794-2275
Jonathan Sokolov
Affiliation:
Department of Materials Science & Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794-2275
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Abstract

We have measured the fracture toughness of PMMA slabs with carbon black and colloidal silica fillers placed at the interface. The results show that the fracture toughness decreases linearly with carbon black concentration. The fracture toughness scales as annealing time, t1/2 indicating that it is diffusion limited. Addition of Colloidal Silica drastically reduces the fracture toughness regardless of concentration and annealing time. These results indicate that carbon black introduces physical cross links which decrease dynamics whereas colloidal silica produces permanent chemical cross links which prevent diffusion across the interface.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 710: Symposia DD – Polymer Interfaces and Thin Films , 2001 , DD9.12.1
Copyright
Copyright © Materials Research Society 2002

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References

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