Easily Processed Host-Guest Polymer Systems with High-Tg Characteristics (First-year Report)
Technical Report,01 Oct 2010,30 Sep 2011
US Army Research Laboratory Aberdeen Proving Ground United States
Pagination or Media Count:
A series of polymethylmethacrylates PMMAs were prepared with varying quantities of Diels-Alder DA crosslinks. The DA linkages are broken at elevated temperatures and may re-form at lower temperatures, which allowed the thermally responsive PMMA TR-PMMA to be blended with PMMA and melt processed on a laboratory scale twin-screw extruder. The blends were easily processed at elevated temperatures, although the initial level of DA crosslinkers included in the TR-PMMA backbone were insufficient to regenerate crosslinks. Higher levels of DA crosslinked TR-PMMAs have been prepared, and are being explored for DA bond reformation and mechanical behavior. In addition, the preparation of host-guest systems incorporating chromophores has been demonstrated, which will allow the use of the TR-polymer concept for electro-optically active polymer applications.
- Physical Chemistry