Some observations on the craze growth kinetics of a cross-linked poly(methylmethacrylate)

The kinetics of craze growth have been investigated in a commercial cross-linked poly(methylmethacrylate). A method has been developed for measuring the growth of a craze during flexural creep loading, and allows the variation of load during the growth measurements. Crazes were initiated using a 1:1...

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Bibliographic Details
Published in:Journal of materials science 1985-03, Vol.20 (3), p.967-974
Main Authors: BURCHILL, P. J, PETRIE, S. P, STACEWICZ, R. H
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Mechanical properties
Physical properties
Polymer industry, paints, wood
Properties and testing
Technology of polymers
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Summary:The kinetics of craze growth have been investigated in a commercial cross-linked poly(methylmethacrylate). A method has been developed for measuring the growth of a craze during flexural creep loading, and allows the variation of load during the growth measurements. Crazes were initiated using a 1:1 isopropanol/water vol:vol mixture as the test fluid, and the time dependence of their growth showed that the process is diffusion controlled. The effect of stress on the growth rate was determined for individual crazes, and was found to be a linear function under the conditions of the experiment. Thus the increase in length with time could be modelled by a three parameter equation, but these parameters were found to depend on the pre-conditioning of the plastic.
ISSN:0022-2461
1573-4803
DOI:10.1007/BF00585741