Chiral Liquid-Crystalline Elastomers Bearing Side-Chain Fluorinated Groups and Chiral Crosslinking Units

Abstract:

Chiral fluorinated side-chain liquid-crystalline elastomers (LCEs) IP - IVP were graft copolymerized by hydrosilylation reaction. The chemical structure, liquid-crystalline behavior and polarization property were characterized by use of various experimental techniques. The effective crosslink density of the chiral LCEs was studied by swelling experiments. All the samples IP - IVP displayed chiral smectic C mesophase (S_C^*) on heating and cooling cycles. With increasing chiral crosslinking units in the elastomer systems, the glass transition temperature and chiral smectic C mesophase-isotropic phase transition temperature of fluorinated elastomers increased slightly, indicating that the temperature range of S_C^* mesophase became narrow with increase of chiral crosslinking agents for all the chiral fluorinated elastomers. All the samples IP - IVP showed 0.12-0.16 μC/cm² of spontaneous polarization.

• Periodical: Advanced Materials Research (Volume 763)
• Pages: 37-40
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.763.37
• Online since: September 2013
• Authors: Chang Du, Nai Yu Zhou, Dan Liu, Fan Bao Meng
• Keywords: Chiral, Elastomer, Fluorinated Polymers, Liquid-Crystalline Polymers

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