Adhesion hysteresis studies of extracted poly(dimethylsiloxane) using contact mechanics

Gun Young Choi, Soojin Kim, Abraham Ulman

Research output: Contribution to journalArticle

Abstract

We present results of adhesion studies of poly(dimethylsiloxane) (PDMS) crosslinked hemispheres, before and after extraction, carried out using contact mechanics (the JKR apparatus.) Three types of PDMS networks were prepared with increasing crosslinker-to-PDMS ratio (r= 1.7,2.2,2.7). Adhesion hysteresis was observed only after the PDMS hemispheres were extracted (toluene, Soxhlet, 20-24 h.) The size of hysteresis increased systematically with the decreasing ratio (increasing percentage of extracted weight. Brief extraction yielded smaller hysteresis, which disappeared after 12 days. It is concluded that the entanglement of tethered chains and their interdigitation with cross-linked PDMS network at the interface may be the dominating mechanisms for the observed adhesion hysteresis.

Original languageEnglish (US)
Pages (from-to)6333-6338
Number of pages6
JournalLangmuir
Volume13
Issue number23
StatePublished - Nov 12 1997

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Polydimethylsiloxane
Hysteresis
Mechanics
adhesion
Adhesion
hysteresis
hemispheres
toluene
Toluene
baysilon

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

Adhesion hysteresis studies of extracted poly(dimethylsiloxane) using contact mechanics. / Choi, Gun Young; Kim, Soojin; Ulman, Abraham.

In: Langmuir, Vol. 13, No. 23, 12.11.1997, p. 6333-6338.

Research output: Contribution to journalArticle

Choi, Gun Young ; Kim, Soojin ; Ulman, Abraham. / Adhesion hysteresis studies of extracted poly(dimethylsiloxane) using contact mechanics. In: Langmuir. 1997 ; Vol. 13, No. 23. pp. 6333-6338.
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