Polarized Raman Scattering Studies of Chain Orientation in Hydrostatically Extruded Polypropylene.
Abstract
It is now established that imposition of hydrostatic pressure can cause substantial changes in the mechanical behavior of polymers. Hydrostatic extrusion has in recent years become a practical technique for altering the mechanical properties of polymers in a controllable manner. Hydrostatic extrusion gives rise to the plastic deformation of polymers and results in changes in molecular orientation as well as texture. At a high extrusion ratio (which is defined as the ratio of cross sectional area of the virgin specimen to that of the extrudate through the die) the extruded samples are known to have highly oriented fiber structure in which stacks of folded chain crystallites are present.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1978
- Accession Number
- ADA052078
Entities
People
- C. H. Wang
- Sushil K. Satija
Organizations
- University of Utah