Nanomechanical Properties of Photo-Cured Cyanoacrylate Bioadhesives Crosslinked by TMPTMA or POSS Nanostructures

Document Type : Research Paper

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Abstract

The  surface  modulus  and  hardness  of  photo-crosslinkable  cyanoacrylate
bioadhesives  containing  TMPTMA  and  POSS  as  crosslinking  agents  were
studied  using  nanoindentation  technique.  Adhesives  containing  2-octyl
cyanoacrylate  (2-OCA)  and  different  percentages  of  POSS  nanostructures  and TMPTMA as crosslinking agents were prepared. 1-Phenyl-1,2-propanedione  (PPD) was incorporated as photo-initiator into the adhesive in 4 wt%. Mechanical properties of  the  surface  of  the  adhesives  were  measured  using  nanoindentation  technique applying a Berkovich tip. The results (three replicates) were analyzed and compared using one-way ANOVA  and Tukey  test  at  a  signifcance  level of 0.05. The  results
showed  that by  incorporation of crosslinking agents, surface modulus and hardness increased and force loss during holding decreased. The incorporation of crosslinking agents  into  the  adhesives  enhanced  their  elastic  properties.  The  surface  modulus and  hardness  increased  by  increasing  crosslinking  concentration.  The  results  also indicated that the elastic work increased, and plastic work dropped due to increasing
crosslinking density. The samples which had been stored in water for 24 h before the tests, showed reduced elastic properties due to the plasticization effect of water.

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Iranian Journal of Polymer Science and Technology
Volume 25, Issue 1 - Serial Number 1
May and June 2012
Pages 53-64

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