Paper Title:
Different Processing Methods to Obtain Porous Structure in Shape Memory Polymers
  Abstract

In the last few years, clinical procedures undergone huge modifications. Among them, mini-invasive surgery has modified the clinical practice and the quality of life of patients. Shape Memory Polymers (SMPs), a class of stimuli-responsive materials, can be considered ideal candidates for the design of devices for mini-invasive surgical procedures. Such a device can be inserted in a packed in, temporary shape and later can expand at body temperature. A bone defect could be filled by a SMP porous structure, that improves the tissue integration and healing. In this work, two different processing techniques to obtain porous shape memory polymer scaffolds from Calo MER™ and MM-4520, two SMPs, are presented. Porous structures were obtained by micro-extrusion with different chemical foaming agents or with sodium chloride, or by solvent casting/particulate leaching. The morphology, the thermo-mechanical and the shape recovery properties of the SMP porous samples were investigated. Tridimensional porous structures showed a well interconnected morphology, with a pore size in the range aimed for bone interaction applications. The shape memory properties were not significantly affected by the transformation processes: a good ability of recovering the original shape was verified. Therefore, the porous structures, obtained from these SMP materials, appear adequate for an use as bone filler.

  Info
Periodical
Materials Science Forum (Volumes 539-543)
Main Theme
Edited by
T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran
Pages
663-668
DOI
10.4028/www.scientific.net/MSF.539-543.663
Citation
S. Farè, L. de Nardo, S. D. Cicco, M. Jovenitti, M. C. Tanzi, "Different Processing Methods to Obtain Porous Structure in Shape Memory Polymers", Materials Science Forum, Vols. 539-543, pp. 663-668, 2007
Online since
March 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Ya Zhang, Xiao Qing Zeng, Chen Lu, Wen Jiang Ding, Yan Ping Zhu
Abstract:Mg92Zn6Y1.5Zr0.5 alloy was extruded at 300, 350, 400 ı. Then, the alloy was aged at 180 ı. The microstructure and mechanical properties of...
123
Authors: Bin Chen, Dong Liang Lin, Xiao Qin Zeng, Chen Lu
Abstract:The elevated temperature mechanical behavior of Mg-Y-Zn alloys was investigated. It was found that the extruded Mg-Y-Zn alloy exhibited...
237
Authors: Anna Kula, Ludwik Blaz, Makoto Sugamata
Abstract:Rapid solidification (RS) combined with following mechanical consolidation of RS powders is considered as a valuable commercial method for...
165
Authors: A. Bahrami, A. Razaghian, M. Emamy, H.R. Jafari Nodooshan, G.S. Mousavi
Abstract:In this study, the relationship between microstructures and mechanical properties of the extrusion processed Al-15wt.%Mg2Si composite was...
1171
Authors: Tomasz Tokarski
Abstract:The present paper reports an experimental investigation of rapid solidification (RS) influence on the structure and mechanical properties of...
120