Controlling nano-scale morphology in switchable PDLC gratings

被引：13

作者：

Pogue, RT ^{[1
]}

Natarajan, LV ^{[1
]}

Tondiglia, VP ^{[1
]}

Siwecki, SA ^{[1
]}

Sutherland, RL ^{[1
]}

Bunning, TJ ^{[1
]}

机构：

[1] USAF, Res Lab, MLPJ, Wright Patterson AFB, OH 45432 USA

来源：

LIQUID CRYSTALS II | 1998年 / 3475卷

关键词：

D O I：

10.1117/12.326903

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Gratings formed by anisotropic phase separation of liquid crystals show tremendous promise for switchable optical elements. Formation of useful gratings is linked to the control of the resulting nano-scale morphologies. In an attempt to decrease scatter and improve the electro-optic properties of polymer-dispersed liquid crystal (PDLC) volume transmission gratings we have evaluated the results of altering the relative concentrations of the components in the pre-polymer mixture. Discussion is made concerning the expected effects on polymerization and phase separation and how these changes are reflected in the film morphologies and electro-optical properties. Initial results indicate that changes in the concentration of co-initiator, chain extender, and effective monomer functionality have a significant effect on the size and shape of the LC domains at constant LC loading.

引用

页码：2 / 11

页数：10

共 13 条

[1] Polymerization-induced phase separation .1. Conversion-phase diagrams [J].

Boots, HMJ ;

Kloosterboer, JG ;

Serbutoviez, C ;

Touwslager, FJ .

MACROMOLECULES, 1996, 29 (24) :7683-7689

[2]

Bunning TJ, 1997, J POLYM SCI POL PHYS, V35, P2825, DOI 10.1002/(SICI)1099-0488(199712)35:17<2825::AID-POLB7>3.0.CO

[3]

2-P

[4] Morphology of reflection holograms formed in situ using polymer-dispersed liquid crystals [J].

Bunning, TJ ;

Natarajan, LV ;

Tondiglia, VP ;

Sutherland, RL ;

Vezie, DL ;

Adams, WW .

POLYMER, 1996, 37 (14) :3147-3150

[5] The effects of eliminating the chain extender and varying the grating periodicity on the morphology of holographically written Bragg gratings [J].

Bunning, TJ ;

Natarajan, LV ;

Tondiglia, VP .

LIQUID CRYSTAL MATERIALS, DEVICES, AND APPLICATIONS IV, 1996, 2651 :44-55

[6]

Drzaic P. S., 1995, Liquid crystal dispersions

[7]

Dusek K., 1967, Journal o f Polymer Science, P1289

[8]

Dusek K., 1969, ADV POLYM SCI, V6, P1

[9]

POGUE RT, 1998, UNPUB

[10] Polymerization-induced phase separation .2. Morphology of polymer-dispersed liquid crystal thin films [J].

Serbutoviez, C ;

Kloosterboer, JG ;

Boots, HMJ ;

Touwslager, FJ .

MACROMOLECULES, 1996, 29 (24) :7690-7698

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