| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5210245 | Reactive and Functional Polymers | 2013 | 11 Pages |
Abstract
Reversibly crosslinked polymethylmethacrylate were prepared by Diels-Alder (DA) reaction using multi-furan and multi-imide precursors. Furan functionalized PMMA were obtained by reactive extrusion (transesterification) between a commercial PMMA and furfuryl alcohol using tin(II)2-ethylhexanoate (Sn(oct)2) or 1,5,7-Triazabicyclo[4.4.0]dec-5-ene (TBD) catalysts. Maleimide based coupling agents were prepared by amine-anhydride reaction. Thermomechanical properties of the PMMA precursors and issued networks were analyzed. Two GⲠand GⳠcross-over temperatures were obtained during the heating and cooling cycles. The first one at 110 °C can be assimilated to physical gel formation and the second one at 160 °C to its breaking. When the network was formed, an increasing of these temperatures is observed. Also, the GⲠbetween these temperatures increased with the network density. The obtained network had a shape memory behavior.
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Authors
Nidhal Okhay, Corinne Jegat, Nathalie Mignard, Mohamed Taha,