First, the mesomorphic properties of PMMAzo polymer was characterized by
differential scanning calorimetry (DSC). From Figure S3, it is clear
that the glass transition temperature (T g) is 72
°C, a short-range smectic phase transition at 87 °C
(Sm-to-N), and a long-range nematic phase transition at
128 °C (T i), respectively. Second, to further
examine the chirality induction capability of CTA and CABu to PMMAzo as
a composite film, a mixture of PMMAzo and CTA/CABu homogeneously
dissolved in a solution (30 mg/mL) at a desired molar ratio was
deposited onto a quartz plate by a conventional spin-coating technique
at 1900 rpm. As shown in Table 1, nine samples of the composite films
comprising PMMAzo and CABu at the desired molar ratio were obtained. The
(chir)optical datasets of the composite films were measured by UV-vis
and CD spectroscopy.
Table 1. The number-average molecular weight
(M n) of PMMAzo-1 to PMMAzo-3. Comparisons between
the g CD values at 1st Cotton
band of the CABu/PMMAzo composite films and their mass ratio
with/without thermal annealing process.