1 / 2

Education and Outreach:

Structure and Dynamics of Polymer Blends Exhibiting Strong Intermolecular Interactions James Runt, Penn State University, DMR-0211056.

oscar-cantu
Download Presentation

Education and Outreach:

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. Structure and Dynamics of Polymer Blends Exhibiting Strong Intermolecular InteractionsJames Runt, Penn State University, DMR-0211056 Many applications are realized through molecular motions: e.g., diffusion of drug molecules or ions is generally coordinated with the segmental relaxation of the host macromolecule. The goal of our research is to develop a fundamental understanding of the role of intermolecular associations (or lack thereof) on the dynamics of polymer multicomponent polymer systems. We recently used broadband dielectric spectroscopy to investigate polymer dynamics and ion conduction in poly(vinylmethyl ether) - salt complexes. The experimental data supports the idea that hopping from one segment to another one is likely the effective fundamental step leading to macroscopic conduction. J. Phys. Chem. 108, 6295 (2004) 3D ‘derivative’ dielectric spectrum of an amorphous miscible blend of 20% poly(ethylene oxide) [PEO] and 80% poly(methyl methacrylate) [PMMA]. The highlighted process (labeled blend) was observed for the first time, and assigned to the relaxation of nm scale regions of PEO partial order. It was proposed that these are ‘mesophase’ - like structures, associated with incipient crystal formation. Macromolecules 37, 8110 (2004).

  2. Structure and Dynamics of Polymer Blends Exhibiting Strong Intermolecular InteractionsJames Runt, Penn State University, DMR-0211056 A number of Penn State undergraduates also actively participated in this research program: Justin Horvath (Chem E). Brad Jones (MatSE), Ms. Jessie Qian (Bio E) and Tom Taggert (MatSE). Education and Outreach: During the course of this program, two students completed their Ph.D. degrees: Dr. Shihai Zhang (now at General Electric in NY) and Dr. Xing Jin (post-doc, Georgia Tech). Dr. Zhang was selected as the recipient of the 2003/04 Materials Research Award for Best Ph.D. Thesis in materials research at Penn State. Currently, the Ph.D. thesis research of Noi Atorngitjawat and Rob Klein (see photo on the right) is partially supported by this program. Several members of the research group currently working with the PI are pictured above [left to right]: Elena Hung (B.S. Princeton); John Creek (B.S. Wash & Lee), Noi Atorngitjawat (M.S. Chulalongkorn U.), Rob Klein (B.S. UCSB); Dr Rebeca Hernandez (Ph.D. U. Complutense)

More Related