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Local Thermal Analysis: Study of viscoelastic properties and time dependence in Surlyn

Published online by Cambridge University Press:  26 February 2011

Harsha Prabhakar Kulkarni ,
Gregory Mogilevsky ,
William Mullins ,
Alfred Kleinhammes  and
Yue Wu
Harsha Prabhakar Kulkarni
Affiliation:
[email protected], University of North Carolina at Chapel Hill, 1100 NC Hwy 54 Bypass, #17, Chapel Hill, NC, 27516, United States
Gregory Mogilevsky
Affiliation:
[email protected]
William Mullins
Affiliation:
[email protected]
Alfred Kleinhammes
Affiliation:
[email protected]
Yue Wu
Affiliation:
[email protected]
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Abstract

Self-healing ability is a fascinating property of some materials. Structural materials with self-healing ability require a subtle combination of flow and stiffness characteristics. A vivid demonstration of self-healing is the automatic sealing of the bullet hole after bullet penetration of the target material. The ionomer Surlyn® satisfies the needs of both structural requirements and self-healing to a certain extent. The viscosity of Surlyn is very high at room temperature, a favorable property for structural applications but unfavorable for self-healing. However, when it was heated to 100°C and then cooled back down to room temperature, its viscosity remains temporarily low at room temperature for a few minutes, a favorable condition for healing. Here we report the measurement of such short-time relaxation effects on flow properties in Surlyn using an atomic force microscope (AFM)-based local thermal mechanical analyzer (LTA).

Keywords

crystallinecalorimetrystructural
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 898: Symposium L – Mechanical Behavior of Biological and Biomimetic Materials , 2005 , 0898-L05-08
Copyright
Copyright © Materials Research Society 2006

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