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Topic Area: Polymers
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1. Effect of Heterogeneity in Nano-TiO2 Filled Acrylic Urethane Coatings on Surface Degradation under Accelerated UV Exposure
Topic: Polymers
Published: 10/30/2014
Authors: Yongyan Pang, Stephanie S Watson, Li Piin Sung
Abstract: The objective of this study was to investigate how the heterogeneity due to nanoparticle dispersion of polymeric coatings affects surface morphological changes during ultraviolet (UV) exposure under different weathering conditions. Three types of nan ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909005

2. Quantifying Crystallinity in High Molar Mass Poly(3-hexylthiophene)
Topic: Polymers
Published: 6/3/2014
Authors: Chad R Snyder, Ryan C Nieuwendaal, Dean M DeLongchamp, Christine K Luscombe, Prakash Sista, Shane D Boyd
Abstract: We extend a recent comprehensive study of 3-hexylthiophene oligomers to high molar mass poly(3-hexylthiophene) (P3HT) fractions, such as those used in organic photovoltaic devices. Through a combination of differential scanning calorimetry (DSC) and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915163

3. Measuring Organelle Shape in 3D in Stem Cells Cultured on Nanofiber Scaffolds
Topic: Polymers
Published: 4/19/2014
Authors: Carl George Simon Jr, Peter Bajcsy, Wojtek J Tutak, Jyotsnendu (Jyotsnendu) Giri
Abstract: Previous work has demonstrated that culture of osteoprogenitor cells on nanofiber scaffolds can potentiate osteogenic differentiation [1-4]. Culture of cells in nanofiber scaffolds causes changes to cell morphology, suggesting that morphological ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914995

4. Measuring Stem Cell Dimensionality in Tissue Scaffolds
Topic: Polymers
Published: 4/1/2014
Authors: Carl George Simon Jr, Sapun Parekh, Christopher K. Tison, Girish Kumar, Tanya M. Farooque, Charles H Camp
Abstract: Many 3D scaffold systems have evolved for tissue engineering, drug screening and in vitro tissue models. However, it is not clear which scaffolds provide a 3D cell niche and there is no clear way to measure cell niche dimensionality. Advances in 3D ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913148

5. Single PPTA fiber tensile test under high strain rate
Topic: Polymers
Published: 4/1/2014
Authors: Jae Hyun Kim, Nathanael A Heckert, Steven P Mates, Jonathan Edward Seppala, Chelsea Simone Davis, Walter G McDonough, Kirk D Rice, Gale Antrus Holmes
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915457

6. Exact solution of the thermodynamics and size parameters of a polymer confined to a lattice of finite size: Large chain limit
Topic: Polymers
Published: 1/21/2014
Authors: Chad R Snyder, Charles Martin Guttman, Edmund Armando DiMarzio
Abstract: We extend the exact solutions of the Di Marzio-Rubin matrix method for the thermodynamic properties, including chain density, of a linear polymer molecule confined to walk on a lattice of finite size. Our extensions enable (a) the use of higher dimen ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913990

7. Saponins: A sustainable surfactant. From its microwave-assisted extraction to the synthesis of monodisperse latices
Topic: Polymers
Published: 1/21/2014
Authors: Charlene Schnitt, Bruno Grassl, Julien C. Gigault, Vincent A Hackley, Gaetane Lespes, Jacques Desbrieres, Virginie Pellerin, Stephanie Reynaud
Abstract: Synthetic surfactants are widely used in emulsion polymerization, but it is increasingly desirable to replace them with naturally derived molecules with a reduced environmental burden. This study demonstrates the use of saponins as sustainable an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914452

8. Measuring order in regioregular poly(3-hexylthiophene) with solid-state 13C CPMAS NMR
Topic: Polymers
Published: 1/10/2014
Authors: Ryan C Nieuwendaal, Chad R Snyder, Dean M DeLongchamp
Abstract: We report on details of molecular packing in high molar mass poly(3-hexylthiophene) (P3HT) by solid-state 13C {1H} cross-polarization magic angle spinning (CPMAS) NMR measurements. The degree of polymer order was estimated for two films of varied dry ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914449

9. Airbrushed Nanofiber Scaffolds Support Bone Marrow Stromal Cell Differentiation
Topic: Polymers
Published: 11/1/2013
Authors: Carl George Simon Jr, Wojtek J Tutak, Sumona Sarkar, Tanya M. Farooque, Jyotsnendu (Jyotsnendu) Giri, Dongbo Wang, Sheng Lin-Gibson, Joachim Kohn, Durgadas Bolikal
Abstract: Nanofiber scaffolds are effective for tissue engineering since they emulate the fibrous nanostructure of native extracellular matrix (ECM). Although electrospinning has been the most common approach for fabricating nanofiber scaffolds, airbrushi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912293

10. Optical Coherence Tomography for Dimensional Metrology of Lab-on-a-chip devices
Topic: Polymers
Published: 10/27/2013
Authors: Darwin R Reyes-Hernandez, Michael W Halter, Jeeseong Hwang
Abstract: Here we present a new metrology tool for the determination of the dimensions of channels from final product Lab-on-a-chip devices. Using Optical Coherence Tomography (OCT) areas of up to 12 mm x 12 mm can be imaged in less than 1 second, without the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914314



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