(Soft Matter) A Homeotropic Main-Chain Tolane-Type Liquid Crystal Elastomer Film Exhibiting High Anisotropic Thermal Conductivity
作者：Ge, S.; Zhao, T.; Wang, M.; Deng, L.; Lin, B.;Zhang, X.; Sun, Y.; Yang, H.*; Chen,E.*
關鍵字：liquid crystal
論文來源：期刊
具體來源：Soft Matter, 2017, 13, 5463-5468.
發表時間：2017年
The development of pure polymeric films with anisotropic thermal conductivities for electronic device packaging applications has attracted intense scientific attention. In order to enhance the polymeric film’s normal-direction thermal conductivity, homeotropic alignment of macromolecular chains is the primary concern. One of the promising preparation strategies is to perform in situ photopolymerization of homeotropic-oriented liquid crystal monomers. In this work, we design and synthesize a novel tolane-core thiol–ene-tailed liquid crystal monomer. Benefitting from the conjugated and extended tolane p-system of the mesogenic core and length extension of the terminal aliphatic tails, the normalto-plane thermal conductivity value and the thermal conductivity anisotropy value of the corresponding cross-linked main-chain end-on liquid crystal polymer (xMELCP) film reach 3.56 W m1 K1 and 15.0, respectively. Compared with the data of a previously reported ester-type thiol–ene xMELCP film, the two primary values of this novel tolane-type thiol–ene xMELCP material are increased dramatically by 46% and 29%, respectively.