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Micromechanical Behavior Of Polymer Interface Reinforced With Copolymers

Published online by Cambridge University Press:  15 February 2011

Q. Wang,
F. P. Chiang,
L. Guo,
M. Rafailovich and
J. Sokolov
Q. Wang
Affiliation:
Dept. of Mechanical Engineering, SUNY at SB, Stony Brook, NY11794–2300
F. P. Chiang
Affiliation:
Dept. of Mechanical Engineering, SUNY at SB, Stony Brook, NY11794–2300
L. Guo
Affiliation:
Dept. of Materials Science and Engineering, SUNY at SB, Stony Brook, NY 11794–2275
M. Rafailovich
Affiliation:
Dept. of Materials Science and Engineering, SUNY at SB, Stony Brook, NY 11794–2275
J. Sokolov
Affiliation:
Dept. of Materials Science and Engineering, SUNY at SB, Stony Brook, NY 11794–2275
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Abstract

The fracture toughness of interface reinforced with dps-b-dpmma copolymer between immiscible polymers of PS and PMMA is tested by asymmetric double cantilever beam. The local deformation field at the interfacial crack tip is determined by the technique of SIEM. Normal and tangential crack opening displacements are calculated. A weak singularity is shown to exist near crack tip. Direct observation on the fracture process inside an environmental scanning electron microscope shows the large effect of mode mixity.

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