Influence of the gradient in orientation on the compressive elastic modulus and yield strength of oriented polypropylene
β Scribed by Robert M. Caddell; Alan R. Woodliff
- Publisher
- Elsevier Science
- Year
- 1979
- Weight
- 243 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0025-5416
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## Abstract The influence of the flow history experienced during injection molding on the mechanical properties of amorphous polymers is investigated. It is demonstrated that flowβinduced molecular orientation only causes a small anisotropic effect on the yield stress, which can be regarded as insi
Local orientation measures by infrared dichroism and thermal stress measures by dilatometric analysis of image (DAI) have made it possible to quantify the evolution of the structure versus the thickness of the injected plastic parts. The stiffness local properties on the one hand, and thermal expans