1. School of Chemical EngineeringHanoi University of Science and Technology No. 1 Dai Co Viet, Hai Ba Trung Hanoi Vietnam
2. Engineering and Technology DivisionMalaysian Rubber Board Sungai Buloh Selangor Malaysia
3. Faculty of EngineeringNagaoka University of Technology 1603‐1 Kamitomioka‐machi, Nagaoka Niigata Japan