1. Chemistry Department, Faculty of Science King Abdulaziz University Jeddah Saudi Arabia
2. Department of Chemistry, Faculty of Applied Science Umm Al‐Qura University Makkah Saudi Arabia
3. Department of Chemistry, Faculty of Applied Science Thamar University Dhamar Yemen
4. Chemistry Department, Faculty of Science University of Khartoum Khartoum Sudan
5. Polymer chemistry Lab., Chemistry Department, Faculty of Science Assiut University Assiut Egypt