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Lee, Fragiadakis, Runt, et al. Macromolecules 2010 , 43, 3125.

Molecular Dynamics of Oriented Polymers Using Dielectric Spectroscopy James P. Runt, Penn State University, DMR 0907139.

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Lee, Fragiadakis, Runt, et al. Macromolecules 2010 , 43, 3125.

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  1. Molecular Dynamics of Oriented PolymersUsing Dielectric Spectroscopy James P. Runt, Penn State University, DMR 0907139 This research program concerns the fundamental investigation of changes in molecular mobility as rubbery polymers are deformed, of critical importance in establishing physical properties for uses ranging from shoe soles to more sophisticated aerospace and biomedical applications. A powerful but surprisingly underutilized experimental technique, broadband dielectric spectroscopy, is used to measure changes in molecular motions at various degrees of mechanical deformation. Recent experiments on rubbery polyurethanes have demonstrated that the deformation is accompanied by very significant changes in mobility, as well as the microphase separated structure. Together with findings from other experimental methods, molecular - level interpretations are being developed, facilitating the tailoring of these materials for advanced applications. Dielectric loss vs. temperature and frequency for a polyurethane elastomer Uniaxial deformation rig Lee, Fragiadakis, Runt, et al. Macromolecules2010, 43, 3125.

  2. Molecular Dynamics of Oriented PolymersUsing Dielectric Spectroscopy James P. Runt, Penn State University, DMR 0907139 The program has supported a number of K-12 outreach and education activities by research group members. For example, Alicia Castagna developed and organized a hands-on polymer workshop held as part of Penn State’s Women In Science and Engineering (WISE) Institute’s WISE Summer Camp. Ms. Castagna and Amanda McDermott also developed and organized 3 hands-on activities on polymers, recycling and energy for the “Eco-Action” workshop for Girl Scouts (photos on the left) coordinated by the Penn State Graduate Women in Science (GWIS). Many research group members actively participated in the Penn State Soft Materials REU program in summer 2010. For example: Ms. McDermott coordinated a novel “Grad School 101” workshop directed toward undergraduate students, to encourage them to apply to graduate school and help demystify the process. Hands on activities at "Eco-Action" workshop for Girl Scouts organized by group members Alicia Castagna and Amanda McDermott (GWIS)

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