Synthesis and properties of metal poly(butyl methacrylates) 7

Metal butyl methacrylate colloids were obtained by codeposition at 77K of the monomer with several metals such as Au, Pd, Cu, Ag, Zn, Cd, Ga, In, Ge, Sn, Sb and Bi. Au and Pd colloids are stable tor months at room temperature. The colloids were polymerized with different amounts of initiator benzoyl peroxide at 65°C for 25 min and a wide range of viscosity-average molecular weights (10³ <M̄_v < 10⁵) were obtained depending upon the metal used. The particle size of the clusters dispersed in the polymer matrix is around 500 A°. The polymers are stable even at 300°C, being Pd-poly(butyl methacrylate) the most stable with 388.90°C. The metal content is ranging from 0.02 to 1.65 wt% for Sb and Pd, respectively. Polymers with different colors were obtained depending on the metal used.     

Electromagnetic and thermal modelling of axisymmetric induction furnaces

A numerical method to describe the thermo-electric behavior of an induction heating furnace is introduced. It is obtained by using an enthalpy formulation concerning the thermal model and an integral representation of the electromagnetic potential in an unbounded domain. A BEM-FEM method is used and an iterative algorithm together with numerical results for an industrial heating system are presented. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)