Optical Properties and Orientation Development in Uniaxially Stretched Syndiotactic Polystyrene from Amorphous Precursors
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C. M. Hsiung
Abstract
On-line uniaxial deformation behavior and deformation induced crystallization characteristics of initially amorphous syndiotactic polystyrene (s-PS) sheets were studied using an Iwamoto biaxial stretcher operated in the uniaxial mode. The stress strain curves obtained under various conditions indicate that this polymer can be stretched uniformly at 110°C which is between its glass transition temperature and cold crystallization temperature. The principal refractive indices were determined as a function of deformation conditions. Because of the negative intrinsic birefringence in the s-PS polymer chains the refractive indices in stretching direction decrease and those in the transverse direction increase with deformation.
© 1992, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Internal and Continuous Mixers
- Model Development for an Internal Mixer
- Simulation of Flow in a Farrel Continuous Mixer
- Extrusion
- Influence of Process Data on the Throughput of Large Extruders within the Range of 600 to 6 000 kg/h
- Conveying and Melting in Screw Extruders with Axial Screw Movement
- Thermo-viscous Effects in Extrusion of Planar Jets with Solidification
- Film
- Dynamics and Stability of Double Bubble Tubular Film Extrusion
- Melt Strength Behavior of Polyethylene Blends**
- Optical Properties and Orientation Development in Uniaxially Stretched Syndiotactic Polystyrene from Amorphous Precursors
- Molding
- Thermoviscoelastic Calculation of Residual Stresses and Residual Shapes of Injection Molded Parts**
- Analysis and Simulation of Structural Reaction Injection Molding (SRIM)
- Crystal Orientation in Injection Moldings of Flaky Filler-Filled Polypropylenes
- Erratum
- Molecular Orientation in Injection-molded Polypropylene Copolymers with Ethylene
Artikel in diesem Heft
- Contents
- Contents
- Internal and Continuous Mixers
- Model Development for an Internal Mixer
- Simulation of Flow in a Farrel Continuous Mixer
- Extrusion
- Influence of Process Data on the Throughput of Large Extruders within the Range of 600 to 6 000 kg/h
- Conveying and Melting in Screw Extruders with Axial Screw Movement
- Thermo-viscous Effects in Extrusion of Planar Jets with Solidification
- Film
- Dynamics and Stability of Double Bubble Tubular Film Extrusion
- Melt Strength Behavior of Polyethylene Blends**
- Optical Properties and Orientation Development in Uniaxially Stretched Syndiotactic Polystyrene from Amorphous Precursors
- Molding
- Thermoviscoelastic Calculation of Residual Stresses and Residual Shapes of Injection Molded Parts**
- Analysis and Simulation of Structural Reaction Injection Molding (SRIM)
- Crystal Orientation in Injection Moldings of Flaky Filler-Filled Polypropylenes
- Erratum
- Molecular Orientation in Injection-molded Polypropylene Copolymers with Ethylene
