Project Details
Projekt
The Influence of Surfaces and Confinement on the Dynamics of Polymer Melts
Applicant
Dr. Margarita Kruteva
Subject Area
Preparatory and Physical Chemistry of Polymers
Term
from 2011 to 2015
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 196471250
The aim of the work is to study the influence of the surfaces and their interaction with polymers at the interface and the confinement resulting from the interfaces in nanoporous systems on the dynamics of polymer melt by neutron scattering methods. The confining systems are presented by well-ordered cylindrical nanopores (2D confinement) of anodic aluminum oxide (AAO) and porous silicon (PSi). We will focus on the segmental dynamics on the local time scale measured by quasielastic neutron scattering (QENS) up to a few nanoseconds and on the large scale dynamics measured by high resolved neutron spin-echo (NSE) spectroscopy extending the time scale to a few hundred of nanoseconds. The main goal of the project is investigation of the influence of the confining surfaces and geometrical confinement on the structure and dynamics of polymer chains at the interface and their extent into a possible interphase for different types of interaction between solid walls and the melt. In particular, we will study the influence of the surface on the local segmental dynamics, unentangled Rouse dynamics and the polymer entanglement network changing the properties of the surfaces by means of chemical treatment. The neutron scattering results will be supplemented by NMR, broadband dielectric spectroscopy (BDS), bulk rheological studies and computer simulations.
DFG Programme
Priority Programmes
International Connection
Spain
Participating Persons
Professor Dr. Juan Colmenero de Leon; Professorin Dr. Carmen Mijangos
