Improvement of permanent memory effect in PDLC films using TX-100 as an additive

Maria Catarina Silva, João L. Figueirinhas, João Carlos da Silva Barbosa Sotomayor

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

A number of polymer dispersed liquid crystal (PDLC) films based on dimethacrylate monomers were synthesised by polymer-induced phase separation ( PIPS) using polyethylene glycol p(1,1,3,3- tetramethylbutyl)-phenyl ether (TX-100) as an additive up to total solution weight of 10% aiming to modify the initial anchorage force of the liquid crystal (LC) molecules to the polymeric matrix. The effects of the addition of this additive to the PDLC films were studied resorting to electro-optical studies. Using a fitting model, several parameters were correlated such as the permanent memory effect (PME), the voltage required to achieve 90% of maximum transmittance (E90), the average elastic constant (K) and the rotational viscosity of the director (.). The use of TX-100 results on an increase on the PME and., and decrease on the E90 and K.
Original languageEnglish
Pages (from-to)124-130
Number of pages7
JournalLiquid Crystals
Volume43
Issue number1
DOIs
Publication statusPublished - 2 Jan 2016

Keywords

  • anchorage force
  • dynamic analysis
  • PDLC
  • Permanent Memory Effect
  • polymeric network

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