Pl. Almeida et al., Preliminary results on UV and high temperature exposure effects on the electro-optical properties of cellulose derivatives based PDLC type cells, MOLEC CRYST, 351, 2000, pp. 61-68
In this work we have studied, by light transmission, the effects of either
UV or high temperature exposure on the electro-optical properties of cellul
ose derivatives based PDLC type cells prepared from hydroxypropylcellulose
(HPC) and HPC cross-linked with 1,4-diisocyanatobutane (BDI) (7,0 % w/w). T
he time evolution of the electro-optical properties of different cells, som
e under UV exposure, and others under high temperature (65 degreesC), was r
ecorded for times up to 7 days. Two sets of cells were analysed, one with e
lectric field off during exposure, the other with electric field on. The re
sults obtained show that no significant changes of the electro-optical prop
erties of the cells occurred under the studied conditions, meaning that the
se systems are very stable and so good candidates for industrial applicatio
ns.