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Shear-induced crystallization of polypropylene/low-density polyethylene blend.
- Source :
-
Journal of Rheology . Jan2024, Vol. 68 Issue 1, p59-69. 11p. - Publication Year :
- 2024
-
Abstract
- Shear-induced crystallization behavior was studied using a phase-separated blend comprising a polypropylene continuous phase and a low-density polyethylene (LDPE) dispersion, which is known to show strain hardening in transient elongation viscosity. In this study, crystallization behavior was mainly evaluated by the light intensity transmitted through a transparent parallel-plate geometry. It was found that shear-induced crystallization was greatly accelerated by the addition of LDPE, resulting in a high crystallization temperature and a highly oriented structure. When the sample was cooled slowly, however, shear-induced crystallization was not accelerated by LDPE. Furthermore, extrusion was performed using a capillary rheometer. The molecular orientation in the strands collected after cooling in the air was found to be enhanced by the LDPE addition, suggesting that flow-induced crystallization was accelerated even at capillary extrusion. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01486055
- Volume :
- 68
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Rheology
- Publication Type :
- Academic Journal
- Accession number :
- 174636807
- Full Text :
- https://doi.org/10.1122/8.0000742