Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: S1.00016 : Nanoconfinement Effect on Polymerization
Author:
Ring-opening metathesis polymerization of endo-dicyclopentadidene (DCPD)
with second generation Grubbs catalyst is carried out under nanoscale
constraint. Differential scanning calorimetry is used to study the
polymerization reaction both in the bulk and in the nanopores of controlled
pore glass as a function of heating rate; the Tg of the resulting reaction
product is also determined. In 110 nm-diameter pores, DCPD undergoes
incomplete polymerization followed by the reverse Diels-Alder reaction to
form pentadiene. Decreasing the heating rate shifts both reactions towards
lower temperatures but does not avert the side reaction. In the bulk
unconfined case, the reverse Diels-Alder reaction only occurs in the absence
of catalyst. The glass transition temperature of the nanoconfined
polymerization product is 164 \r{ }C, approximately 20 \r{ }C higher than
the polymer prepared under bulk conditions. Reaction kinetics in bulk and
nanoconfined cases will also be discussed.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.S1.16
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