Crystallization and Mechanical Properties of Polypropylene under Processing-Relevant Cooling Conditions with respect to Isothermal Holding Time
Joint Authors
Drummer, Dietmar
Fischer, Christopher
Source
International Journal of Polymer Science
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-09-15
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
For semicrystalline thermoplastics, aside from pressure and shear, the temperature-time behavior while cooling the melt significantly affects the geometry and degree of ordered structures (e.g., spherulite size, degree of crystallization, and crystal modification) and, as a consequence, the resulting global component properties.
Previous research has shown that a higher isothermal holding temperature (e.g., mold temperature and chill-roll temperature) leads to the formation of more distinct ordered structures and, therefore, can lead to greater stiffness and strength.
Nevertheless, isothermal holding time during manufacturing is typically not taken into account.
In this paper, fast scanning calorimetry (FSC) measurements were taken using polypropylene to analyze the crystallization during idealized temperature-time profiles based on the dynamic temperature process and to investigate the crystallization behavior at different temperatures and isothermal holding times analytically.
Furthermore, iPP foils were extruded and tested mechanically to investigate the knowledge gained experimentally.
Analytical and mechanical results show that foils produced at the same isothermal holding temperature can obtain significantly different ordered structures and mechanical properties depending primarily on the isothermal holding time.
American Psychological Association (APA)
Fischer, Christopher& Drummer, Dietmar. 2016. Crystallization and Mechanical Properties of Polypropylene under Processing-Relevant Cooling Conditions with respect to Isothermal Holding Time. International Journal of Polymer Science،Vol. 2016, no. 2016, pp.1-11.
https://search.emarefa.net/detail/BIM-1106809
Modern Language Association (MLA)
Fischer, Christopher& Drummer, Dietmar. Crystallization and Mechanical Properties of Polypropylene under Processing-Relevant Cooling Conditions with respect to Isothermal Holding Time. International Journal of Polymer Science No. 2016 (2016), pp.1-11.
https://search.emarefa.net/detail/BIM-1106809
American Medical Association (AMA)
Fischer, Christopher& Drummer, Dietmar. Crystallization and Mechanical Properties of Polypropylene under Processing-Relevant Cooling Conditions with respect to Isothermal Holding Time. International Journal of Polymer Science. 2016. Vol. 2016, no. 2016, pp.1-11.
https://search.emarefa.net/detail/BIM-1106809
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1106809