Infrared imaging of stress-crazing in rubber modified polystyrene

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 lo...

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Bibliographic Details
Published in:Polymer engineering and science 1998-03, Vol.38 (3), p.385-391
Main Authors: Telenkov, S. A., Wang, Yingxia, Lu, Yuesheng, Favro, L. D., Kuo, P. K., Thomas, R. L.
Format: Article
Language:English
Subjects:
Analysis
Applied sciences
Exact sciences and technology
Infrared imaging
Mechanical properties
Physical properties
Polymer industry, paints, wood
Polystyrene
Properties and testing
Technology of polymers
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Summary: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.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.10199