A new type of block copolymers comprising both main-chain and side-chain liquid-crystalline (LC) blocks in the same macromolecular structure was synthesized and studied. The former was a semiflexible LC polyester block, and the latter was an LC polymethacrylate block. Thermal, dynamic-mechanical, and X-ray diffraction data indicated that the two structurally different blocks were partly phase-separated in the glassy and LC states. Significant deviations of the transition temperatures and enthalpies were observed relative to those of the corresponding homopolymers.
Hybrid Liquid-Crystalline Block Copolymers. I. Synthesis and Mesomorphic Behavior of Polyester-Polymethacrylate Block Copolymers / M., Laus; M. C., Bignozzi; A. S., Angeloni; Francescangeli, Oriano; G., Galli; E., Chiellini. - In: POLYMER JOURNAL. - ISSN 0032-3896. - 27 (10):(1995), pp. 993-1001. [10.1295/polymj.27.993]
Hybrid Liquid-Crystalline Block Copolymers. I. Synthesis and Mesomorphic Behavior of Polyester-Polymethacrylate Block Copolymers
FRANCESCANGELI, ORIANO;
1995-01-01
Abstract
A new type of block copolymers comprising both main-chain and side-chain liquid-crystalline (LC) blocks in the same macromolecular structure was synthesized and studied. The former was a semiflexible LC polyester block, and the latter was an LC polymethacrylate block. Thermal, dynamic-mechanical, and X-ray diffraction data indicated that the two structurally different blocks were partly phase-separated in the glassy and LC states. Significant deviations of the transition temperatures and enthalpies were observed relative to those of the corresponding homopolymers.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
