1. a Electroactive Polymers Department, 'P. Poni' Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487-Iasi, Romania;, Email: grigoras47@yahoo.com
2. b Electroactive Polymers Department, 'P. Poni' Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487-Iasi, Romania