Nonlinear electrical conductivity of tin-filled urea-formaldehyde-cellulose composites
作者： Gabriel Pinto , Abdel-Karim Maaroufi
DOI: 10.1002/PC.20106
关键词:
摘要: This work reports on the elaboration and characterization of composite materials prepared by compression molding mixtures tin powder a commercial grade thermosetting resin urea-formaldehyde filled with alpha-cellulose in form. The morphology constituents composites has been characterized optical microscopy. porosity rate determined from density measurements. These results show that are homogeneous. Furthermore, it shown hardness samples remains almost constant increase metal concentration. electrical conductivity is <10−11 S/cm unless content reaches percolation threshold at volume fraction 18.6%, beyond which increases markedly as much 11 orders magnitude. have well interpreted statistical theory frame. POLYM. COMPOS., 26:401–406, 2005. © 2005 Society Plastics Engineers
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