1. Research Unit in Polymeric Materials for Medical Practice Devices, Department of Chemical Engineering, Faculty of EngineeringChulalongkorn University Bangkok Thailand
2. Department of Industrial Chemistry, Faculty of Applied ScienceKing Mongkut's University of Technology North Bangkok Bangkok Thailand
3. Civil Engineering Laboratory, Department of Civil Engineering, Faculty of EngineeringChulalongkorn University Bangkok Thailand
4. Department of Chemical Engineering, Faculty of EngineeringSrinakharinwirot University Nakhon Nayok Thailand