TY - JOUR
T1 - Effects of molecular weight on liquid-crystalline behavior of a mesogen-jacketed liquid crystal polymer synthesized by atom transfer radical polymerization
AU - Zhang, H.
AU - Yu, Z.
AU - Wan, X.
AU - Zhou, Q. F.
AU - Woo, E. M.
N1 - Funding Information:
Supported by CNNSF (20134010).
PY - 2002/2/18
Y1 - 2002/2/18
N2 - The synthesis of poly {2,5-bis[(4-methoxyphenyl)oxycarbonyl]styrene} (PMPCS) with different molecular weight and low polydispersity was achieved by atom transfer radical polymerization in methoxybenzene solution using 1-bromoethylbenzene as an initiator and CuBr/sparteine complex as a catalyst. The concentration of the living centers throughout the polymerization was found to be constant. The liquid-crystalline behavior of the polymers with Mn ranging from 3800 to 17,400 g/mol was studied using DSC and POM. Only the polymers with Mn beyond 10,200 g/mol formed a liquid-crystalline phase, which was quite stable with a high clearing point (higher than the decomposition temperature of the polymer).
AB - The synthesis of poly {2,5-bis[(4-methoxyphenyl)oxycarbonyl]styrene} (PMPCS) with different molecular weight and low polydispersity was achieved by atom transfer radical polymerization in methoxybenzene solution using 1-bromoethylbenzene as an initiator and CuBr/sparteine complex as a catalyst. The concentration of the living centers throughout the polymerization was found to be constant. The liquid-crystalline behavior of the polymers with Mn ranging from 3800 to 17,400 g/mol was studied using DSC and POM. Only the polymers with Mn beyond 10,200 g/mol formed a liquid-crystalline phase, which was quite stable with a high clearing point (higher than the decomposition temperature of the polymer).
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U2 - 10.1016/S0032-3861(02)00019-8
DO - 10.1016/S0032-3861(02)00019-8
M3 - Article
AN - SCOPUS:0037127960
SN - 0032-3861
VL - 43
SP - 2357
EP - 2361
JO - polymer
JF - polymer
IS - 8
ER -