β Scribed by J. W. Qian; Alfred Rudin
No coin nor oath required. For personal study only.
Polystyrene is not normally shear-modifiable. Addition of small amounts of plasticizer (butyl benzyl phthalate) result in changes in melt viscosity and elasticity during extrusion. Fiber spinning experiments are shown to provide useful indications of the rheological state of polymers that are sensitive to shear history. Here, the density, modulus and work to rupture of lightly plasticized polystyrene is shown to vary with extrusion history of the material.
π SIMILAR VOLUMES
## Abstract An engineering equation that describes the steady shear viscosity of polystyrene melts is developed as an extension of the well known power law model for nonβNewtonian viscosity. The parameters in the equation have been related to weight and number averaged molecular weights and tempera
Abstrac~Zero shear melt viscosity data, r/o, as a function of temperature on anionic polystyrenes (PS), as measured by Pierson and by Ueno et al., have been analysed using both a first derivative program and computerized regression analysis. Such data at each Mn fall on three straight lines when plo