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

doi:10.1080/02678292.2015.1061713

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 journal › Article › peer-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 language	English
Pages (from-to)	124-130
Number of pages	7
Journal	Liquid Crystals
Volume	43
Issue number	1
DOIs	https://doi.org/10.1080/02678292.2015.1061713
Publication status	Published - 2 Jan 2016

Keywords

anchorage force
dynamic analysis
PDLC
Permanent Memory Effect
polymeric network

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title = "Improvement of permanent memory effect in PDLC films using TX-100 as an additive",

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.",

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author = "Silva, {Maria Catarina} and Figueirinhas, {Jo{\~a}o L.} and Sotomayor, {Jo{\~a}o Carlos da Silva Barbosa}",

note = "Fundacao para a Ciencia e Tecnologia (PTDC/CTM-POL/122845/2010; PEst-OE/FIS/UI0261/2011)",

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doi = "10.1080/02678292.2015.1061713",

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AU - Silva, Maria Catarina

AU - Figueirinhas, João L.

AU - Sotomayor, João Carlos da Silva Barbosa

N1 - Fundacao para a Ciencia e Tecnologia (PTDC/CTM-POL/122845/2010; PEst-OE/FIS/UI0261/2011)

PY - 2016/1/2

Y1 - 2016/1/2

N2 - 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.

AB - 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.

KW - anchorage force

KW - dynamic analysis

KW - PDLC

KW - Permanent Memory Effect

KW - polymeric network

U2 - 10.1080/02678292.2015.1061713

DO - 10.1080/02678292.2015.1061713

M3 - Article

VL - 43

SP - 124

EP - 130

JO - Liquid Crystals

JF - Liquid Crystals

SN - 0267-8292

IS - 1

ER -

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

Abstract

Keywords

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