Hello,
I have grafted a layer of epoxysilane on a thermoset silane-crosslinked polyethylene. The thickness of the grafted layer is below 30 nm and the thickness of the crosslinked polyethylene substrate is 2 mm. A reviewer has asked me to perform 1HNMR and 13C-NMR analysis, in addition to ATR-FTIR and XPS, to characterize the functionalities in the nanometric layer. I should add that both the epoxy-silane layer and substrate are crosslinked and not soluble. I was wondering if you could guide me on how can I perform NMR analysis in order to detect the variations only in the nanometric layer on the surface (i.e., a surface-specific NMR).
Not much sample. ATR and XPS may be of value (ATR maybe), but NMR on that thin of a film may be too much of a tall order. Regardless, you're looking at Solid-State NMR for crosslinked polymers.
Interrogating those two species, you'll see primarily the substrate. I would consult with an NMR spectroscopist and check the equations for signal response of a given species, as they're concentration dependent. If you calculate based on 'concentration' of expected species, I think you'll find a conclusion that you can discuss with the reviewer in the response. Best of luck on experiments!
Dear Curtis Guild
I appreciate your comprehensive and helpful answer.
- Badges
- Science topic
- Similar topics
- Chemistry
- Nanotechnology
- Nanostructures
- Thin Films