1. Chinese Agricultural Ministry Key Laboratory of Natural Rubber ProcessingAgricultural Product Processing Research Institute at Chinese Academy of Tropical Agricultural SciencesZhanjiang524001 China
2. Department of Rubber Technology and Polymer Science, Faculty of Science and TechnologyPrince of Songkla UniversityPattani94000 Thailand
3. Faculty of Science and Industrial TechnologyPrince of Songkla UniversitySurat Thani84000 Thailand