Mechanism for improvement in mechanical and thermal stability in dispersed phase polymer composites

作者：Thakur Awalendra K^*

来源：Ionics, 2011, 17(2): 109-120.

DOI：10.1007/s11581-010-0498-y

• Polymer composites
• Ionic conductivity
• Thermal stability
• Tensile strength
• FTIR

We report substantial improvement in the mechanical stability, thermal stability, and conductivity of four series of ion-conducting dispersed phase composite polymer electrolytes (CPEs). Tensile strength of filler-dispersed composite films was a parts per thousand yen2 MPa in contrast to similar to 1 MPa for undispersed polymer-salt complex. Similarly, elongation at break has shown an increase by similar to 200-300% in the composite films. Filler-induced enhancement in thermal and mechanical stability has clearly been noticed. The improvement in the mechanical stability is also accompanied by a corresponding increase in electrical conductivity in the composite films by 1-2 orders of magnitude at lower (2 wt.%) of the filler loading. A mechanism for the improvement in mechanical stability has been proposed. The strength of the mechanism lies in evidenced polymer-filler interaction among the composite components. Suppression of thermal degradation and increased mechanical strength of the CPEs on filler addition has been explained on the basis of transient cross-linking of the polymeric segments and filler-polymer bridging effect.

• 出版日期2011-3