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NG7 Reflectometer Langmuir Monolayer study of tethered polymer brushes

NG7 Reflectometer Langmuir Monolayer study of tethered polymer brushes. Green team Summer School 2006. Sample system. PDMS = poly(dimethy siloxane) SLD=7x 10 -8 Å -2 d-PS= poly(styrene) SLD=6.4 x 10 -6 Å -2 Solvent = dioctyl phthalate (DOP) SLD=.618 x 10 -6 Å -2.

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NG7 Reflectometer Langmuir Monolayer study of tethered polymer brushes

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  1. NG7 Reflectometer Langmuir Monolayer study of tethered polymer brushes Green team Summer School 2006

  2. Sample system PDMS = poly(dimethy siloxane) SLD=7x 10-8 Å-2 d-PS= poly(styrene) SLD=6.4 x 10-6 Å-2 Solvent = dioctyl phthalate (DOP) SLD=.618 x 10-6 Å-2

  3. NG-7 Reflectometer

  4. Fitted SLD profiles from different models

  5. Reflectivity profile for different MW

  6. Tethered polymer profiles at different MW • =0[1-(z/L0)2]1/2

  7. Conclusion • Higher MW, further stretching into the solvent • Tethered Chain model describes profile reasonably well Acknowledgments: Red, Orange, Yellow, Blue, & Purple Groups NCNR

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