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Iranian Polymer Journal

, Volume 26, Issue 6, pp 405–411 | Cite as

Polyhedral oligomeric silsesquioxane-based hybrid networks obtained via thiol-epoxy click chemistry

  • Seda Bekin Acar
  • Mustafa Ozcelik
  • Tamer Uyar
  • Mehmet Atilla TasdelenEmail author
Original Paper

Abstract

A series of hybrid networks based on polyhedral oligomeric silsesquioxane (POSS) were prepared by thiol-epoxy click reaction using commercially available octakis-glycidyl-POSS (G-POSS), trimethylolpropane triglycidyl ether, and trimethylolpropane tris(3-mercaptopropionate) as monomers. The click reaction was simply catalyzed by lithium hydroxide which proceeded readily at ambient conditions in very good yields. The incorporation of G-POSS into the network was clearly determined by transmission electron microscopy, FTIR, and 1H-NMR spectroscopy techniques performed with a model study using 1-butane thiol and G-POSS molecules. The homogeneous distribution of G-POSS up to 5 wt% in the hybrid network was apparently confirmed by morphological investigations. By increasing G-POSS content higher than 5 wt%, the heterogeneous dispersion of G-POSS was determined from the tensile strength measurements. The significant decrease in tensile strength was possible due to the agglomeration of G-POSS. On the other hand, thermal properties of hybrid networks were compared together by thermogravimetric analyses, where all samples exhibited one-step degradation in the range of 220–500 °C. The thermal decomposition of hybrid network led to complete degradation of the organic part and favored the formation of stable carbonaceous and inorganic residues as char. Thus, the char yields of hybrid networks were increased to 6.2, 7.8, 10.1, 12.7, and 15.1% by G-POSS loadings from 0 to 15 wt%. This improvement was also a proof of the incorporation of G-POSS into the hybrid networks that resulted in high heat-resistant POSS-based hybrid networks compared to a sample without G-POSS.

Keyword

Click chemistry Hybrid networks Polyhedral oligomeric silsesquioxanes  Thermosets Thiol-epoxy reaction 

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Copyright information

© Iran Polymer and Petrochemical Institute 2017

Authors and Affiliations

  1. 1.Department of Polymer Engineering, Faculty of EngineeringYalova UniversityYalovaTurkey
  2. 2.UNAM-Institute of Materials Science and NanotechnologyBilkent UniversityAnkaraTurkey

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