1. Plastics Engineering Department, University of Massachusetts Lowell, Lowell, MA 01854, USA
2. Department of Industrial Engineering, University of Padova, 35100 Padova, Italy
3. Department of Sciences and Methods for Engineering, University of Modena and Reggio Emilia, 41124 Reggio Emilia, Italy
4. EN&TECH, University of Modena and Reggio Emilia, 41124 Reggio Emilia, Italy