(618bv) Photo-Responsive Trithiocarbonate

Title: Photo-responsive Trithiocarbonate

Author: Diana Leung; Christopher N. Bowman

Presenting Author: Diana Leung

The ability to create
well-defined topography is useful in responsive surfaces and optics. To allow
for photoinduced structural adaptation in elastomeric networks, a functional
group that can rearrange in order to relieve stress is needed. Here, we used 1, which contains acrylate functional
groups that undergo a Michael addition with PETMP and a trithiocarbonate core
that subsequently is used for addition-fragmentation chain transfer (AFCT) with
the acrylate in the presence of a photointiator. By incorporating the
trithiocarbonate backbone, stress relaxation by rearrangement can occur, so
that upon stretching followed by irradiation of the photoinitiator, the AFCT
can occur, to produce a well-defined and controlled topography in the
irradiated region.