Five entangled melts, with the number of entanglements per chain ranging from 25 to 160, have been studied to illustrate how cohesive strength can be overcome in either continuous or interrupted extension (i.e., during or after uniaxial stretching). The internal elastic stress due to chain deformation from imposed strain appears to be the cause of the observed yielding behavior that reveals scaling laws. The visual signature of the elastic breakup is the occurrence of nonuniform extension. The yield phenomena may be understood at a force level.
Physical Review Letters
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Copyright 2007 American Institute of Physics. The original published version of this article may be found at http://dx.doi.org/10.1103/PhysRevLett.99.237801.
Wang, Yangyang; Boukany, Pouyan; Wang, Shi-Qing; and Wang, Xiaorong, "Elastic Breakup in Uniaxial Extension of Entangled Polymer Melts" (2007). College of Polymer Science and Polymer Engineering. 106.