Thermomechanical Formation and Recovery of Nanoindents in a Shape Memory Polymer Studied Using a Heated Tip
Author(s) -
Yang Fuzheng,
Wornyo Edem,
Gall Ken,
King William P.
Publication year - 2007
Publication title -
scanning
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.359
H-Index - 47
eISSN - 1932-8745
pISSN - 0161-0457
DOI - 10.1002/sca.20074
Subject(s) - polymer , materials science , shape memory polymer , glass transition , annealing (glass) , atomic force microscopy , acrylate , composite material , nanometre , indentation , atmospheric temperature range , polymer chemistry , nanotechnology , copolymer , thermodynamics , physics
This paper investigates the thermomechanical formation and recovery of nanometer‐scale indents in a shape memory polymer (SMP), studied using a heated atomic force microscope (AFM) tip and hot‐stage atomic force microscopy. The material tested is a tert‐butyl acrylate (tBA)‐based polymer, which has a glass transition temperature of 60 °C. The AFM tip forms indents in the polymer in the temperature range 25–250 °C. The shape recovery of the indents is studied while the polymer is heated up to 100 °C. The temperature required for complete annealing of the indents depends upon the indentation formation conditions, with higher temperature formation corresponding to higher temperature recovery. SCANNING 29: 000–V000, 2007. © 2007 Wiley Periodicals, Inc.
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