Issue
J. Phys. IV France
Volume 134, August 2006
EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 217 - 223
DOI https://doi.org/10.1051/jp4:2006134033
Published online 26 July 2006
EURODYMAT 2006 - 8th International Conference on Mehanical and Physical Behaviour of Materials under Dynamic Loading
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. Cohen

Department 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 $\alpha $-transition and a low-temperature $\beta $-transition (-56$^{\circ}$C) in the neat PVC; the incorporation of 20wt% DOP in PVC reduced the $\alpha $-transition temperature by 54$^{\circ}$C, and also suppressed the $\beta $-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 $\beta $-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.



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