1. Electroactive Polymers Department, 'Petru Poni' Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, Iasi-700487, Romania,
2. Electroactive Polymers Department, 'Petru Poni' Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, Iasi-700487, Romania