The effect of viscosity modifiers on the flow properties of prevulcani
zed NR latex (PVL) was studied at different shear rates and temperatur
es. PVL exhibited pseudoplastic flow pattern. The pseudoplasticity dec
reased on increasing temperature. The viscosity of PVL can be increase
d by the addition of viscosity modifiers such as casein, polyvinyl alc
ohol (PVA) and sodium carboxymethyl cellulose (NaCMC), the predominant
effect being obtained by the addition of NaCMC.