S. Makhija et M. Jaffe, SYNTHESIS, CHARACTERIZATION, AND PROCESSING OF AROMATIC COPOLYESTERS WITH DIFFERENT MONOMER SEQUENCES, Journal of applied polymer science, 53(5), 1994, pp. 609-620
Two aromatic copoyester compositions were prepared from p-hydroxybenzo
ic acid, hydroquinone, and isophthalic acid with compositions 2 : 1 :
1 (HIQ50) and 1 : 1 : 1 (HIQ33). For each of these compositions, one r
andom copolyester and one known sequence copolymer was prepared. The r
andom compositions were prepared by melt condensation, whereas control
led sequence polymers were prepared by low-temperature solution polyme
rization. For the 1 : 1 : 1 composition, the controlled sequence polym
er had higher crystallinity than that of the random, whereas the 2 : 1
: 1 composition random copolymer had higher crystallinity. The differ
ence in crystallinity is attributed to the sequence distributions in t
he copolymers. All compositions were thermotropic in nature. (C) 1994
John Wiley & Sons, Inc.