Document Type
Article
Publication Date
5-31-2025
Abstract
This study investigates advancements in multilayer co-extrusion of annular structures, focusing on the mechanical properties of a 129-layer polystyrene (PS)/poly(methyl methacrylate) (PMMA) pipe with 50% PS as a skin layer for proof-of-concept validation. We explore the impact of angular rotation on burst pressure, layer structure, and failure mechanisms, emphasizing the potential of this technique for enhanced mechanical performance through biaxial orientation and the elimination of weld lines. Utilizing high aspect ratio (HAR) multipliers and angular rotation, our findings demonstrate improved layer structure and burst pressure performance at higher velocity ratios, which is the ratio of the linear component of angular velocity to the extrusion throughput velocity. At a velocity of 1.15, the 129-layer PS/PMMA tube exhibits a hoop stress of 10.9 MPa and a burst pressure of 3.9 MPa, achieving about 76% and 90% of the performance metrics of pure PMMA tubes with only 25% PMMA content, respectively. Microscopic examination reveals increased residual stress and biaxial orientation within the layers, contributing to the observed performance enhancements. These insights highlight the effectiveness of angular rotation in achieving high-performance polymeric tubes, presenting a promising approach for optimizing multilayer co-extruded annular structures in fluid transport applications.
Keywords
biaxiality, coextrusion, failure, polystyrene, viscosity
Language
English
Publication Title
Polymer Engineering and Science
Rights
© 2025 The Author(s). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/), which permits non-commercial copying and redistribution of the material in any medium or format, provided the original work is not changed in any way and is properly cited.
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Recommended Citation
N. Shaghaghi , E. Steinmetz , T. Schneider , and J. Maia , “ Burst Pressure Performance of Multilayer Co-Extruded Polystyrene/Poly (Methyl Methacrylate) Pipes,” Polymer Engineering & Science 65, no. 8 (2025): 4061–4069, https://doi.org/10.1002/pen.27270.
Manuscript Version
Final Publisher Version