Diflraction Studies of Polyethylene and Polypropylene Creep Specimens
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X-Ray diffraction studies were performed on polyethylene and polypropylene Samples which were elongated in creep tests at very low strain rates. The results of the creep tests were reported earlier.' The creep specimens were found to have a preferred orientation similar to that reported by other investigators ²¯¹¹ and, in addition, to have an orientation-dependent change in lattice parameter.
The article of record as published may be found at http://onlinelibrary.wiley.com/doi/abs/10.1002/app.1971.070150320
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