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Surface indentation arrays for high-throughput analysis of viscoelastic material properties

Rev. Sci. Instrum. 80, 103904 (2009); doi:10.1063/1.3247905

Published 30 October 2009

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Peter M. Johnson and Christopher M. Stafford
Polymers Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, USA
Viscoelastic relaxation processes factor into polymer performance and stability throughout an application lifetime, controlled by the polymer network structure and dynamics which occur over a wide spectrum of time scales. In this work, we detail the design and operation of an independent array of surface indenters which can measure the creep response at multiple points on a polymer substrate. Samples with composition and temperature gradients are used to exhibit the ability to measure viscoelastic properties under unique conditions for each indentation. Methacrylate photopolymer systems are measured at different compositions and crosslink densities simultaneously within an indenter array to increase the measurement throughput, with a measured creep compliance ranging from 10−9  Pa−1 to 10−5  Pa−1. The application of temperature gradients allows for the viscoelastic measurements to be assembled onto a master curve using time-temperature superposition. ©2009 American Institute of Physics
History: Received 3 September 2009; accepted 23 September 2009; published 30 October 2009
Permalink: http://link.aip.org/link/?RSINAK/80/103904/1
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KEYWORDS and PACS

Keywords
PACS
  • 68.35.Gy
    Mechanical properties and surface strains of solid surfaces and interfaces
  • 81.40.Np
    Fatigue, embrittlement, fracture and failure
  • 81.40.Jj
    Elasticity and anelasticity, stress-strain relations
  • 61.41.+e
    Structure of polymers, elastomers, and plastics
  • 62.20.Qp
    Friction, tribology and hardness
  • 62.20.Hg
    Creep
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0034-6748 (print)   1089-7623 (online)
Publisher:
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