present in conventional composites. Even at low clay concentrations (<10 wt%), the
thermomechanical properties can be substantially improved.
The various structural factors influencing the thermal and thermotropic properties
of main-chain, aromatic polyesters with and without substituents or side-groups
based on nanocomposites have not been systematically studied. Thus, essential
studies of the structure and length of mesogenic units and substituents or sidegroups, the nature of lateral substituents in the mesogenic parts, inclusion of a
kink unit in the mesogenic structure, the molecular weight and thermal history of
the polymer, and the copolymers’ structures and nanocompositions are the most
important factors investigated. Further investigation of the thermal properties should
account for the chemical structures in side groups, given that the morphology and
liquid crystallinity depend strongly on the side group of the TLCP.
Cross-References
▶ Gas Permeation and Barrier Properties of Liquid Crystalline Polymers
Acknowledgments This research was supported by the Ministry of Trade, Industry & Energy
(MOTIE, Korea) under the Industrial Technology Innovation Program (No. 10063420, Development of high strengthen thermotropic liquid crystal polyester fiber).
References
Agag T, Koga T, Takeichi T (2001) Stidies on thermal and mechanical properties of polyimide-clay
nanocomposites. Polymer 42:3399–3408
Baird DG, Sun T (1990) Novel composites from blends of amorphous and semicrystalline engineering thermoplastics with liquid-crystalline polymers. In: Weiss RA and Ober CK (ed) Liquid
crystalline polymers, 1st edn. ACS Symposium Series 435, Washington, p 416–438
Chang J-H (2014) Preparation and characterization of poly(trimethylene terephthalate) nanocomposites. In: Pandey et al (eds) Handbook of polymer nanocomposites. Processing, performance and application, Volume a: layered silicates, 1st edn. Springer, New York, pp 267–292
Chang J-H, Jo B-W, Jin J-I (1994) In situ composites of a new thermotropic LCP and PBT. Korean
Polym J 2:140–147
Chang J-H, Ju CH, Kim SH (2006) Synthesis and characterization of a series of thermotropic liquid
crystalline copolyester nanocomposites. J Polym Sci B Polym Phys 44:387–397
Chang J-H, Ham M, Kim J-C (2014) Comparison of properties of poly(vinyl alcohol) nanocomposites containing two different clays. J Nanosci Nanotechnol 14:8783–8791
Fornes TD, Yoon PJ, Hunter DL, Keskkula H, Paul DR (2002) Effect of organoclay structure on
nylon 6 nanocomposite morphology and properties. Polymer 43:5915–5933
Garcia-Martinez JM, Laguna O, Areso S, Collar EP (2000) A thermal and mechanical study under
dynamical conditions of polypropylene/mica composites containing atactic polypropylene with
succinil-fluoresceine grafted groups as interfacial modifier from the matrix side. J Polym Sci B
Polym Phys 38:1564–1574
Giannelis EP (1996) Polymer layered silicate nanocomposites. Adv Mater 8:29–35
Gilman JW (1999) Flammability and thermal stability studies of polymer layered-silicate (clay)
nanocomposites. Appl Clay Sci 12:31–49
606
T. Y. Ha et al.
thermomechanical properties can be substantially improved.
The various structural factors influencing the thermal and thermotropic properties
of main-chain, aromatic polyesters with and without substituents or side-groups
based on nanocomposites have not been systematically studied. Thus, essential
studies of the structure and length of mesogenic units and substituents or sidegroups, the nature of lateral substituents in the mesogenic parts, inclusion of a
kink unit in the mesogenic structure, the molecular weight and thermal history of
the polymer, and the copolymers’ structures and nanocompositions are the most
important factors investigated. Further investigation of the thermal properties should
account for the chemical structures in side groups, given that the morphology and
liquid crystallinity depend strongly on the side group of the TLCP.
Cross-References
▶ Gas Permeation and Barrier Properties of Liquid Crystalline Polymers
Acknowledgments This research was supported by the Ministry of Trade, Industry & Energy
(MOTIE, Korea) under the Industrial Technology Innovation Program (No. 10063420, Development of high strengthen thermotropic liquid crystal polyester fiber).
References
Agag T, Koga T, Takeichi T (2001) Stidies on thermal and mechanical properties of polyimide-clay
nanocomposites. Polymer 42:3399–3408
Baird DG, Sun T (1990) Novel composites from blends of amorphous and semicrystalline engineering thermoplastics with liquid-crystalline polymers. In: Weiss RA and Ober CK (ed) Liquid
crystalline polymers, 1st edn. ACS Symposium Series 435, Washington, p 416–438
Chang J-H (2014) Preparation and characterization of poly(trimethylene terephthalate) nanocomposites. In: Pandey et al (eds) Handbook of polymer nanocomposites. Processing, performance and application, Volume a: layered silicates, 1st edn. Springer, New York, pp 267–292
Chang J-H, Jo B-W, Jin J-I (1994) In situ composites of a new thermotropic LCP and PBT. Korean
Polym J 2:140–147
Chang J-H, Ju CH, Kim SH (2006) Synthesis and characterization of a series of thermotropic liquid
crystalline copolyester nanocomposites. J Polym Sci B Polym Phys 44:387–397
Chang J-H, Ham M, Kim J-C (2014) Comparison of properties of poly(vinyl alcohol) nanocomposites containing two different clays. J Nanosci Nanotechnol 14:8783–8791
Fornes TD, Yoon PJ, Hunter DL, Keskkula H, Paul DR (2002) Effect of organoclay structure on
nylon 6 nanocomposite morphology and properties. Polymer 43:5915–5933
Garcia-Martinez JM, Laguna O, Areso S, Collar EP (2000) A thermal and mechanical study under
dynamical conditions of polypropylene/mica composites containing atactic polypropylene with
succinil-fluoresceine grafted groups as interfacial modifier from the matrix side. J Polym Sci B
Polym Phys 38:1564–1574
Giannelis EP (1996) Polymer layered silicate nanocomposites. Adv Mater 8:29–35
Gilman JW (1999) Flammability and thermal stability studies of polymer layered-silicate (clay)
nanocomposites. Appl Clay Sci 12:31–49
606
T. Y. Ha et al.