Tin-based "super-POSS" building blocks in epoxy nanocomposites with highly improved oxidation resistance

Adam Strachota, Krzysztof Rodzeń, François Ribot, Magdalena Perchacz, Miroslava Trchová, Miloš Steinhart, Larisa Starovoytova, Miroslav Šlouf, Beata Strachota

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A novel tin-based POSS analogue, butylstannoxane dodecamer, was incorporated as chemically active nanofiller in epoxy resins and achieved a considerable anti-oxidative activity already near 0.05 wt% and very high activity near 1 wt%. The amino-functional nanofiller, which bonds as a linear segment, displayed a high reactivity towards the resin components during cure and was very poorly extractable. Interestingly, at elevated temperatures, the stannoxane nanofiller, whose functional substituents are attached by ionic bonds, displays a considerable short-range mobility in the matrix, and in course of a nano-phase-separation process, rearranges and polymerizes to needle-like nano-domains. This effect leads to additional crosslinking in the nanocomposite. This "solid-phase nano-precipitation" does not occur under oxidative conditions, where the nanofiller preferentially undergoes crosslinking with matrix chains and is thereby immobilized. Nanocomposite synthesis, characterization and the concentration dependence of the nanofiller effect are presented.

Original languageEnglish
Pages (from-to)3498-3515
Number of pages18
JournalPolymer
Volume55
Issue number16
Early online date20 Jun 2014
DOIs
Publication statusPublished - 5 Aug 2014

Bibliographical note

Funding Information:
The authors thank Czech Science Foundation , grant Nr. 108/11/2151 for the financial support of this work.

Keywords

  • Nanocomposite
  • POSS
  • Stannoxane

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