writer：Wang, L.; Liu, W.; Guo, L.; Lin, B.; Zhang, X.; Sun, Y.; Yang, H.*
keywords：LCE
source：期刊
specific source：Polymer Chemistry, 2017, 8, 1364-1370.
Issue time：2017年

Monodomain liquid crystalline elastomers (LCEs)

with anisotropic, loosely crosslinked polymeric matrices, have attracted intense scientific attention due

to their widespread applications in stimuli-responsive soft actuators.

However, traditional synthetic pathways towards monodomain LCEs require complicated

procedures, elevated

reaction temperatures, and prolonged

preparation

time

ranging from several hours to even several days.

In this manuscript, we report a fast room-temperature one-pot,

two-stage thiol-ene photoaddition method to synthesize monodomain

polysiloxane-based LCE films. The first stage is a partial thiol-ene photo-crosslinking

of poly(3-mercaptopropylmethylsiloxanes) and vinyl-terminated mesogens and

crosslinkers in solution, the second stage is a complete thiol-ene photo-crosslinking

of the uniaxial-stretched pre-crosslinked LCE film. Starting from mesogenic monomers, the

whole preparation process can be finished in less than 30 minutes, and all the

preparation experiments are performed at room temperature, in the open air.We believe that this facile one-pot, two-stage

thiol-ene photoaddition method can open a new route for fast and robust

productions of monodomain LCE shape memory materials.