Extended X-ray absorption fine structure (EXAFS) experiments were performed at 25 and 105°C for Zn (II) salts of ethylene-methacrylic acid (5.4 mol% ) copolymer and their complexes with 1,3-bis (aminomethyl) cyclohexane (BAC) (EMAA-Zn-BAC). The zinc carboxylate in EMAA-Zn-BAC systems was in a four-fold coordination at room temperature. The Zn-0 distance increased with increasing BAC content, and became smaller at 105°C than at room temperature for EMAA-06OZn and EMAA-06OZn-04OBAC but scarcely changed with temperature for EMAA-0.60Zn-0.97BAC. The fluctuation factor (a) was larger at 105°C than at room temperature for all the samples, due to thermal vibration. In this paper, it is pointed out that these EXAFS results support the presence of an order-disorder transition in ionic clusters
Посилання на статтю:
EXAFS studies on Zn( II) complexes with 1,3-bis( aminomethyl)cyclohexane of ethylene-methacrylic acid copolymer / Kenji Tsunashima // Polymer. – 1992. – Vol 33. – P. 1809-1812.