Low Density Polyethylene, Expanded Polystyrene and Expanded Polypropylene: Strain Rate and Size Effects on Mechanical Properties DS Cronin 1 , S Ouellet 2 1 Department of MME, University of Waterloo, 200 University Avenue West, Waterloo, Can 2 Defence Research and Development Canada‐Valcartier, 2459 Bravoure rd, Quebec, Can Submitted to: Journal of Polymer Testing Corresponding Author: Dr. Duane Cronin Department of Mechanical Engineering University of Waterloo 200 University Ave. West Waterloo, Ontario, Canada, N2L 3G1 [email protected] (519) 888‐4567 x32682 Word Count: 3841 (Introduction to Conclusions) Acknowledgements: The authors would like to thank DRDC Valcartier Research Center for financially supporting this research. The authors gratefully acknowledge the assistance of Jeff Wemp and Jeff Moulton in the material testing.