Issue |
J. Phys. IV France
Volume 134, August 2006
EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
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Page(s) | 217 - 223 | |
DOI | https://doi.org/10.1051/jp4:2006134033 | |
Published online | 26 July 2006 |
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 217-223
DOI: 10.1051/jp4:2006134033
High-rate thermomechanical behavior of poly(vinyl chloride) and plasticized poly(vinyl chloride)
A.D. Mulliken, S.Y. Soong, M.C. Boyce and R.E. CohenDepartment of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, USA
Published online: 26 July 2006
Abstract
A combined experimental and analytical investigation was
carried out in order to develop predictive capabilities for the
rate-dependent behavior of poly(vinyl chloride) (PVC) and a dioctyl
phthalate (DOP)-plasticized PVC, with focus on predicting the
thermo-mechanically coupled behavior under high rates of deformation. The
two materials were studied experimentally using both dynamic mechanical
analysis (DMA) and compression testing over a wide range of strain rates
(10 - 4 s - 1 to 2000 s - 1). DMA testing revealed both an
-transition and a low-temperature
-transition (-56
C)
in the neat PVC; the incorporation of 20wt% DOP in PVC reduced the
-transition temperature by 54
C, and also suppressed the
-transition peak. In compression testing, rate-sensitivity
transitions were observed in both the neat PVC and the PVC-20wt% DOP
compound. The transition in PVC is attributed to the shift of the
-transition, whereas the transition in the 20wt% DOP blend is due to the
rubbery-to-glassy transition as the deformation rate goes from low to high.
A constitutive model for the finite strain deformation of amorphous
polymers, introduced elsewhere [1,2] and tailored here for the two material
systems of interest, is shown to capture the large deformation stress-strain
behavior at all rates tested.
© EDP Sciences 2006