منابع مشابه
architecture and engineering of nanoscale sculptured thin films and determination of their properties
چکیده ندارد.
15 صفحه اولViscoelastic properties of confined polymer films measured via thermal wrinkling†
We present a new wrinkling-based measurement technique for quantifying the viscoelastic properties of confined polymer thin films. This approach utilizes real-time laser-light scattering to observe the kinetics of thermally-induced surface wrinkling, which evolves isothermally as a function of annealing time. Specifically, wrinkling is induced by applying a thermal stress to a polystyrene film ...
متن کاملViscoelastic Multi-mode Simulations of Wire-coating
A time-stepping nite element method is used to predict the viscoelastic stresses that arise in a tube-tooling wire-coating problem. The polymer melt HDPE is modelled by a multi-mode Phan-Thien/Tanner constitutive equation. Di erent ow geometries are considered to address optimisation of the process with respect to minimising the stress induced within the coating produced. The in uence of the di...
متن کاملForward roll coating flows of viscoelastic liquids
Roll coating is distinguished by the use of one or more gaps between rotating cylinders to meter and apply a liquid layer to a substrate. Except at low speed, the two-dimensional film splitting flow that occurs in forward roll coating is unstable; a three-dimensional steady flow sets in, resulting in more or less regular stripes in the machine direction. For Newtonian liquids, the stability of ...
متن کاملViscoelastic Computations of Polymeric Wire-coating Flows
This study considers both a single and multi-mode viscoelastic analysis for wirecoating ows. The numerical simulations utilise a nite element time-stepping technique, a Taylor-Petrov-Galerkin/pressure-correction scheme employing both coupled and decoupled procedures between stress and kinematic elds. An exponential Phan-Thien/Tanner model is used to predict pressure-drop and residual stress for...
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ژورنال
عنوان ژورنال: Journal of the Japan Society of Colour Material
سال: 1989
ISSN: 0010-180X
DOI: 10.4011/shikizai1937.62.100