1. Department of Polymer Technology; Tshwane University of Technology, CSIR, Campus; Lynwood Ridge Pretoria 0040 South Africa
2. Department of Packaging; Yonsei University; Wonju Gangwon-Do 220-710 Korea
3. Centro De Investigación De Polímeros Avanzados (CIPA); Beltrán Mathieu 224 Piso 2 Concepción Chile
4. Department of Biochemistry; University of Johannesburg; Auckland Park Kingsway Campus Johannesburg 2006 South Africa