Feb 12 2015 09:00 AM
Feb 12 2015 10:30 AM
The synthesis of well-defined linear and non-linear
copolymers and terpolymers, materials which exhibit compositional and
molecular homogeneity, is considered to be a difficult task when
techniques different from anionic polymerization are adopted.
Additionally, synthesizing high molecular weight polymers is complicated
enough even when anionic polymerization and high vacuum techniques are
being used, since very thorough and careful purification of all the
reagents used is necessary.
Multiarm star polymers are a unique category of materials
with applications in medicine, microelectronics, optics etc., which
require the use of novel polymers with improved properties and enhanced
performances. The polymers studied will be focused on those exhibiting
molecular and compositional homogeneity, thus well-defined model
polymeric materials will be described. Many differences in the synthesis
procedure as well as in the properties are ascribed when these
materials are compared with the corresponding linear structures. The
complex architectures exhibit a basic role leading in most cases to
unique new potential applications especially in the nano scale. Finally,
the effect of the architecture on microphase separation and
self-assembly will be studied since major discrepancies and divergences
are observed with theoretical models and the corresponding linear
Our main concern is to prepare various types of copolymers
and study their properties as well as their structure/properties
relation and verify theoretical predictions.
The synthesis and molecular characterization via SEC (Size
Exclusion Chromatography), MO (Membrane Osmometry) and LS (Light
Scattering) of various architectures and molecular weights will be
mainly given. The synthesis of complex architectured polymers was more
challenging since different approaches were used depending on the
variability of the chains.
Morphological results observed from TEM (Transmission
Electron Microscopy) and SAXS (Small-Angle X-Ray Scattering) will be
described as well.