Rheology of room-temperature vulcanizing (RTV) silicone. coatings.
26 October 1987
The time-dependent rheology properties of two polydimethyl siloxane based encapsulants which are currently being used in manufacturing at AT&T Tech. MV were studied. The flow behavior of these materials was characterized, with particular emphasis at low rates of deformation (. gamma 1 sec sup (-1), using cone and plate fixtures in the creep mode on a Rheometrics Constant Stress Rheometer. At shear rates 10 sup (-2), sec sup (-1), both the materials exhibited "yield-stresses" which suggest the existence of a cross-linked network-like structure caused by the formation of agglomerates of surface active, silica filer particles that are added to the encapsulants.