Architectural characteristics of stochastic honeycombs fabricated from varying melt strength polypropylenes
Article first published online: 6 NOV 2013
Copyright © 2014 Wiley Periodicals, Inc.
Journal of Applied Polymer Science
Volume 131, Issue 7, April 5, 2014
How to Cite
2014). Architectural characteristics of stochastic honeycombs fabricated from varying melt strength polypropylenes. J. Appl. Polym. Sci. 131, 40074, doi: 10.1002/app.40074and (
- Issue published online: 13 JAN 2014
- Article first published online: 6 NOV 2013
- Manuscript Accepted: 19 OCT 2013
- Manuscript Received: 26 JUL 2013
Stochastic honeycombs are a cellular polymer fabricated through a simple melt-stretching process. In this study, five polypropylenes (PP) with varying rheological properties were used to fabricate stochastic honeycombs over a range of densities. Rheology tests were performed to determine the melt behavior, while micro-CT scans were used as a nondestructive characterization technique to determine the internal architecture. The sandwich structure consists of parallel skins separated by a network of interconnected webs. The cross-sectional area decreased from unit area at the skins to a plateau over the middle third of the honeycomb height where the cross-sectional area and total edge length of the webs were relatively constant. The rheological properties of the polymer were found to determine the web length per unit area, while the starting areal density of the polymer controlled the mid-height cross-sectional area. Other features, such as archways and buttresses, act as secondary structures that support the webs. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40074.