Polypyrrole-based conducting hot melt adhesives for EMI shielding applications

Abstract Intrinsically conducting hot melt adhesives (ICHMAs) have been developed, based on polypyrrole (PPy) blends, for use in electronic and telecommunication applications requiring shielding against electromagnetic interference (EMI). These advanced materials have been formulated to exhibit significant EMI shielding effectiveness (SE) while retaining the superior properties of conventional hot melt adhesives. The conductivity properties, adhesion characteristics and both near- and far-field EMI SE behaviour of these ICHMAs at room temperature are investigated as a function of PPy content. The environmental stability of the conductivity is also reported. Potential use of such new materials in current and future electronic applications is anticipated.

[1]  Harvey Scher,et al.  Critical Density in Percolation Processes , 1970 .

[2]  A. Mohan,et al.  Plane-wave shielding effectiveness studies on conducting polypyrrole , 1994 .

[3]  E. Ruckenstein,et al.  The electromagnetic interference shielding of polypyrrole impregnated conducting polymer composites , 1991 .

[4]  G. Gardini,et al.  Conducting polypyrrole by chemical synthesis in water , 1988 .

[5]  A. Celzard,et al.  Critical concentration in percolating systems containing a high-aspect-ratio filler. , 1996, Physical review. B, Condensed matter.

[6]  S. Jussila,et al.  Thin polyaniline films in EMI shielding , 1997 .

[7]  Arthur J. Epstein,et al.  Electromagnetic radiation shielding by intrinsically conducting polymers , 1994 .

[8]  Ishiguro,et al.  Logarithmic temperature dependence of resistivity in heavily doped conducting polymers at low temperature. , 1992, Physical review letters.

[9]  P. Kathirgamanathan.  Novel cable shielding materials based on the impregnation of microporous membranes with inherently conducting polymers , 1993 .

[10]  Claude M. Penchina,et al.  The physics of amorphous solids , 1983 .

[11]  N. Colaneri,et al.  EMI shielding measurements of conductive polymer blends , 1991 .

[12]  S. Manoochehri,et al.  A Review of Research in Materials, Modeling and Simulation, Design Factors, Testing, and Measurements Related to Electromagnetic Interference Shielding , 1995 .

[13]  J. Pomposo,et al.  Hydrogen bonding in polymer systems involving poly(p-vinylphenol). 1. Binary blends with poly(ethyl methacrylate-co-methyl methacrylate) , 1994 .

[14]  Joo,et al.  Drude Metallic Response of Polypyrrole. , 1995, Physical review letters.

[15]  Kalle Levon,et al.  Multiple percolation in conducting polymer blends , 1993 .

[16]  Moses,et al.  Transport in polyaniline near the critical regime of the metal-insulator transition. , 1993, Physical review. B, Condensed matter.