1. Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin 682022, Kerala, India
2. Department of Chemistry, Government College Kottayam, Kottayam 686013, Kerala, India
3. Department of Chemistry, Mar Thoma College, Tiruvalla 689103, Kerala, India
4. Leibniz Institute of Polymer Research Dresden, Hohe Strasse 6, 01069 Dresden, Germany