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Infrared imaging of stress‐crazing in rubber modified polystyrene
Author(s) -
Telenkov S. A.,
Wang Yingxia,
Lu Yuesheng,
Favro L. D.,
Kuo P. K.,
Thomas R. L.
Publication year - 1998
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10199
Subject(s) - crazing , materials science , composite material , ultimate tensile strength , natural rubber , polystyrene , tensile testing , fracture (geology) , context (archaeology) , stress (linguistics) , deformation (meteorology) , polymer , paleontology , linguistics , philosophy , biology
The plastic yield and fracture of rubber‐modified polystyrene specimens under tensile load have been investigated at room temperature. The experimental procedure consisted of rapidly alternating measurements of transmitted and emitted infrared (IR) radiation from samples under tensile stress. The load‐displacement data were simultaneously recorded. Both single‐edge‐notched and dog bone‐shaped test coupons were studied. In each tensile test run, we observed a significant decrease of material transparency in the IR which occurred near the low yield point. A further increase in material deformation was accompanied by a substantial temperature increase. After material failure, the surface morphology of the test specimens in the vicinity of the crack was examined using atomic force microscopy (AFM). Our results are explained in the context of existing models of material crazing.