Chemistry Reference
In-Depth Information
poly(oxyalkyleneterephthaloyl-bis-4-oxybenzoyl-4′-oxybenzoate,
where R = −CH
2
−CH
2
OCH
2
−CH
2
−; −(−CH
2
CH
2
O−)
2
−CH
2
CH
2
− oxy-
ethylene decouplings; polyethylene glycols (PEG) PEG 200, PEG 300,
PEG 400, PEG 600, PEG 1000 - polyoxyethylene decouplings of various
molecular weights and copolymers based on 3,3′-dioxybisphenyl with ele-
ments of regularity within the main chain:
links of terephthalic acid - links of terephthaloyl-bis(
n
-oxybenzoic)
acid - links of 3,3′-dioxybisphenyl.
The synthesized in Ref. [136] were the block-copolymers contain-
ing the links of terephthaloyl-bis(
n
-oxybenzoate) and polyarylate. It was
found that such polymers had liquid-crystal nematic phase and the biphase
separation occurred at temperatures above 280
°
C.
The thermotropic liquid-crystal copolyester of polyethyleneterephthal-
ate and terephthaloyl-bis(
n
-oxybenzoate) was described in Ref. [137]. The
snapshots of polarized microscopy revealed that copolyester was nematic
liquid-crystal one.
When studying the reaction of reetherification happening in the mix
50:50 of polybutyleneterephthalate and complex polyester, containing
mesogenic sections from the remnants of
n
-oxybenzoic (I) and tere-
phthalic (II) acids separated by the tetramethylene decouplings the con-
tent of four triads with central link (I) and three triads with central link
