Table 6
Structure composition, thermal transition temperature, liquid crystalline phase, and char yield of the synthesized copolyesters derived from
isopropylidenediphenol. Comparative copolyester with dodecyl
flexible spacer is attached (Hamciuca et al. 2006)
R
Monomer ratio
T
g (
C)
Thermal transition from POM
LC phase
Residue (wt%)
a
TOBC
DOPO-HQ
HO–R–OH
T
m (
C)
T
i (
C)
–
1
1
0
160
385
–
Nematic
41
1
0.5
0.5
139
220
251
Nematic
28
1
0.5
0.5
146
257
297
Nematic
23
–(CH 2 )
12
–
1
0.5
0.5
–
246
310
Nematic
8
T
g glass transition temperature, T
m melting temperature, T
i isotropic temperature, LC liquid crystalline
a
Residue at 700
C were detected by TGA at a heating rate of 10
C min
À1
under nitrogen atmosphere
20 Highly Flame-Retardant Liquid Crystalline Polymers
565
Structure composition, thermal transition temperature, liquid crystalline phase, and char yield of the synthesized copolyesters derived from
isopropylidenediphenol. Comparative copolyester with dodecyl
flexible spacer is attached (Hamciuca et al. 2006)
R
Monomer ratio
T
g (
C)
Thermal transition from POM
LC phase
Residue (wt%)
a
TOBC
DOPO-HQ
HO–R–OH
T
m (
C)
T
i (
C)
–
1
1
0
160
385
–
Nematic
41
1
0.5
0.5
139
220
251
Nematic
28
1
0.5
0.5
146
257
297
Nematic
23
–(CH 2 )
12
–
1
0.5
0.5
–
246
310
Nematic
8
T
g glass transition temperature, T
m melting temperature, T
i isotropic temperature, LC liquid crystalline
a
Residue at 700
C were detected by TGA at a heating rate of 10
C min
À1
under nitrogen atmosphere
20 Highly Flame-Retardant Liquid Crystalline Polymers
565