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Dynamics in Polymeric Thin Films Frank D. Blum, University of Missouri-Rolla, DMR-0412320

Bulk 5.4 mg/m 2 2.1 mg/m 2 1.8 mg/m 2 1.4 mg/m 2 0.6 mg/m 2. Derivative of Reversing Heat Flow. 100 120 140 160 180 200 Temperature (°C). Dynamics in Polymeric Thin Films Frank D. Blum, University of Missouri-Rolla, DMR-0412320.

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Dynamics in Polymeric Thin Films Frank D. Blum, University of Missouri-Rolla, DMR-0412320

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  1. Bulk 5.4 mg/m2 2.1 mg/m2 1.8 mg/m2 1.4 mg/m2 0.6 mg/m2 Derivative of Reversing Heat Flow 100 120 140 160 180 200 Temperature (°C) Dynamics in Polymeric Thin FilmsFrank D. Blum, University of Missouri-Rolla, DMR-0412320 The thermal properties of polymers attached (adsorbed) onto solid surfaces is of importance in a number of fields such as advanced electronics. As the demand for lighter weight materials grows stronger, the polymer layers are made thinner. At very small amounts, polymer layers are affected by the interfaces with dissimilar materials (such as a glass or silicon surface). We have used modulated differential scanning calorimetry to quantify the amount of tightly-bound poly(methyl methacrylate) (PMMA) adsorbed on silica. Results suggest that the first (approximately) 1.3 nm of polymer are tightly bound. - Frank D. Blum, Erin N. Young, Gregory Smith, and Oliver C. Sitton,Thermal Analysis of Adsorbed Poly(methyl methacrylate) on Silica, Langmuir, 2006, 22, 4741-4744. (This work was done, in part, by Greg Smith as a high school student.) silica Heat flow (thermal transitions) for PMMA adsorbed on silica in different amounts. The dashed lines represent the transitions for tightly-bound (1.1 nm thick, 156 °C) and loosely-bound (123 °C) polymer.

  2. Dynamics in Polymeric Thin FilmsFrank D. Blum, University of Missouri-Rolla, DMR-0412320 Outreach: The PI, through this grant, has been involved with a summer program with Rolla High School. The following high school students have been involved with research in Dr. Blum's lab. H.S. Student - When worked - Current Position Madeleine Philpot - Su02 - Medical School, U Missouri Greg Smith - Su03, Su04 - Chemistry, U. Bristol Steve Puzach - Su05, Su 06 - Chem. Eng., U. Missouri-Rolla Sarah Jackson - Su06 - High School Senior Education: Support from this NSF grant (and its predecessor) allowed the following students to complete their degrees: Burak Metin (Ph.D. 2006), Okuom McDuff (Ph.D. Chemistry, 2005); Sunil Pillalamarri (Ph.D. Chemistry, 2005); Pavan Challa (M.S. Chemistry, 2005); Ravindra Vohra (M.S. Chemical Engineering, 2005). In addition, UMR graduate students Manikantan Nair, Piyawan Krisanangkura, and Lea Dankers have worked on this research. Greg Smith Sarah Jackson Steve Puzach

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