exhibit glass transition temperatures at 105
C and 75
C, respectively. Polymer 17
showed a columnar phase to isotropic transition at 115
C (Boden et al. 1995). All
polymers 19.1–19.4 formed ordered columnar mesophase, between the glass transition
and clearing temperatures as shown in Table 6 (Wan et al. 2003).
68
S. Setia et al.