Paper Title:
Characterization and Thermal Behaviour of Polymer-Dispersed Liquid Crystals
  Abstract

The thermal behaviour of polymer dispersed liquid crystals (PDLC), blends of poly(ethylene-co-methylacrylic acid) (PEMA) with 4-(n-hydroxypropoylxy)-4'-cyanobiphenyl (H3CB) prepared by solvent-induced phase separation (SIPS) method, has been characterized using differential scanning calorimetry (DSC) and polarized light microscopy (POM). Study shows that the concentration of the mixture of PEMA/ H3CB must be least 30%, which will exhibit nematic to isotropic transition phase during heating or cooling. Above 30 wt % 3CB the mixtures exhibited nematic phase, and this was detected as a splitting of the nematic-isotropic peak in the DSC thermograms. The clearing temperature of the PEMA/H3CB mixtures was higher than that of pure H3CB’s, the average increasing being 14°C, which is the evident that the polymer matrix could stable the nematic phase. This behaviour is in contrast with other reports about polymer-dispersed liquid crystals. In addition, thermal decomposition was also studied by thermogravimetry in nitrogen environments. A double-stage decomposition process was found in nitrogen atmosphere, and this was mainly due to H3CB for the first step and the PEMA decomposition for the second step.

  Info
Periodical
Advanced Materials Research (Volumes 152-153)
Edited by
Zhengyi Jiang, Jingtao Han and Xianghua Liu
Pages
284-287
DOI
10.4028/www.scientific.net/AMR.152-153.284
Citation
X. G. Han, X. Y. Wei, X. Y. Wang, R. A. Shanks, "Characterization and Thermal Behaviour of Polymer-Dispersed Liquid Crystals", Advanced Materials Research, Vols. 152-153, pp. 284-287, 2011
Online since
October 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Kui Chen, Rui Chen Yang, S.W. Cheng
Abstract:The thermal decomposition kinetics and thermal stability of poly (methyl methacrylate) (PMMA) and PMMA/ montmorillonite (MMT) nanocomposites...
1366
Authors: Yun Wu Zheng, Li Bin Zhu, Ji You Gu, Yan Hua Zhang
Abstract:Curing is the key to the bonding, the study indicate that: curing effect on the glue bond strength, formaldehyde emission as well as...
1038
Authors: Ai Jun Han, Li Ya Zhang, Ming Quan Ye, Dong Sheng Hu, Hou He Chen
Chapter 8: Energy Materials
Abstract:Nanocrystalline CoxZn1-xCr2O4 (x=0.7, 0.8, 0.9, 0.95, and 1) was...
3409
Authors: Ping Hu, Qin Qin Luo, Meng Pan
Chapter 14: Mechanical Behavior and Fracture
Abstract:Modified neoprene adhesive dedicated to bonding UHMWPE and 45# steel was prepared. Thermal analysis with TG-DTG curve was determined and its...
2125
Authors: Kai Guo, Xiao Qing Shen, Yuan Yuan Zhan, Jin Zhou Chen, Ming Jun Niu, Yu Kun Liu, Xin Fa Li
VI. Materials and Detection Technology
Abstract:To enhance the crystallizability and flexibility, Poly L-lactide (PLLA)/ Talc/ tributyl citrate(TBC) composites were prepared via melt...
572