Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session L60: Poster Session II
Wednesday, March 7, 2018
LACC Room: West Hall A
Abstract: L60.00056 : Analysis of SANS Patterns from 1D Symmetrically Confined Polymers
(Physics, Virginia Tech)
(National Institute of Standards and Technology)
(Materials Science and Engineering, Univ of Pennsylvania)
Understanding how polymer chain conformations are altered under nanoconfinement is critical for understanding polymer behavior in applications ranging from nanoscale lithography to polymer nanocomposites. Previous work that measured polymer conformations under 1D confinement has been limited to using “open face” thin films, where at least one confining surface is free. In these samples, changes in the polymer conformations perpendicular to the confining surfaces have proven difficult to measure. Our study uses a new and unique sample geometry, consisting of long, narrow, and deep polymer filled channels that rigidly confine the polymer on both sides. This geometry should allow SANS to simultaneously probe chain conformation parallel and perpendicular to the confining surfaces. The resulting anisotropic SANS patterns from empty templates are fit using a dynamical theory based on the Bloch wave expansion of the neutron wave function to account for the complex nature of the template. Here we present our initial results developing the fitting theory and extracting polymer Rg in the confined and unconfined dimensions.
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700