1. Department of Chemical Technology, Faculty of Science; Chulalongkorn University; 254 Phayathai Road, Pathumwan Bangkok 10330 Thailand
2. Faculty of Science; Chulalongkorn University; 254 Phayathai Road, Pathumwan Bangkok 10330 Thailand
3. Center of Excellence on Petrochemical and Materials Technology; Chulalongkorn University; Bangkok 10330 Thailand