(722bg) Adhesive Properties and Thermodynamic Stability of Hpc:PEG Films
AIChE Annual Meeting
2008
2008 Annual Meeting
Materials Engineering and Sciences Division
Poster Session: Materials Engineering and Sciences Division
Thursday, November 20, 2008 - 6:00pm to 8:30pm
Polymer blends are created by mixing polymers with different chemical
structures together in order to create new properties intermediate between
the two individual polymer components. Film structure, surface properties,
and stability of immiscible hydroxypropyl cellulose (HPC) polyethylene
glycol (PEG) polymeric blend films were investigated. The effect of
substrate properties on the phase separation behavior of a polymer films has
been investigated. We found that the amplitude of this process may be
modified by a substrate material. This is due to the reduced surface
attraction of HPC for the increased surface coverage by PEG. It was observed
that regime of spinodal decomposition of films could be controlled through
manipulation of key parameters of film formation process. Control of these
parameters result in guided surface morphology where surface roughness, pore
size, and segregation can be predicted and directed