1 / 10

NG-3 SANS: Tri-block Copolymer Monomer to Micelle Transitions with Change in Temperature Red Group

NG-3 SANS: Tri-block Copolymer Monomer to Micelle Transitions with Change in Temperature Red Group. PEO-Hydrophobic. PEO. PEO. P-85 Pluronics. Fully Extended. Collapsed. Why SANS?. Structural Information Transition Temperature Size of Aggregates Compositional Information

ida
Download Presentation

NG-3 SANS: Tri-block Copolymer Monomer to Micelle Transitions with Change in Temperature Red Group

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NG-3 SANS: Tri-block Copolymer Monomer to Micelle Transitions with Change in Temperature Red Group

  2. PEO-Hydrophobic PEO PEO P-85 Pluronics Fully Extended Collapsed

  3. Why SANS? • Structural Information • Transition Temperature • Size of Aggregates • Compositional Information • Is the core completely PPO • How solvated are the polymer “whiskers”

  4. cold neutrons beam shutter area detector sample area BEAM BEAM ON OFF velocity selector collimation 15 m 15 m NG-3 System Overview • Why use two detector distances? • Scan whole Q-range • 0.0239 – 0.4742Å-1 for small source to sample • 0.0035 – 0.0491 Å-1 for large source to sample • Less detector distances allow for many samples

  5. P85 10 wt.% 10 oC Rg=1.16 nm Scale = 0.36 Scale F(Rg)

  6. P85 10 wt.% 50 oC 50 oC 10 oC dShell= 2.7 nm RCore= 4.7nm • = 0.25 PolyCore=0.15 D2O:PEO in shell 28.5 Agg. Number 78

  7. P85 10 wt.% 25 oC 50 oC 25 oC 10 oC Rg=1.16 nm Scale = 0.36 dShell= 2.7 nm RCore= 4.7nm f = 0.25

  8. Conclusions • Using SANS the temperature-dependent morphology of P85 was characterized • Contrast-matching may allow confirmation of the modeling results

  9. Acknowledgements Special thanks to: Paul Butler and Joe Dura Boualem Hammouda & Steve Kline Everyone at NCNR

  10. Questions?

More Related