Liquid Crystal Polymer Networks: Toward Soft Actuators and Dynamic Surface Reliefs

Liu, Danqing; Bastiaansen, Cees W. M.; Broer, Dirk J.

doi:10.1002/9783527671403.hlc119

Handbook of Liquid Crystals 2014

DOI: 10.1002/9783527671403.hlc119

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Liquid Crystal Polymer Networks: Toward Soft Actuators and Dynamic Surface Reliefs

Danqing Liu

Cees W. M. Bastiaansen

Dirk J. Broer

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“…On the other hand, hydrophobic liquid crystal polymer (LCP) has high stability for the long time uses maintaining the original electrical properties (Figure S1). The LCP has been studied by many researchers as a thermoplastic material for flexible printed circuit board (FPCB) because of its multiple advantages in terms of low hygroscopicity, dielectric constant, loss tangent, chemical stability, flexible property, and high formability. − …”

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confidence: 99%

Thermal-Partial Compression Process: Bypass Route for Multilayer Lamination of Liquid Crystal Polymer-Based 5G Patch Antenna Fabrication

Jeong

Hong

Sung

et al. 2022

ACS Appl. Eng. Mater.

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A thermoplastic material lamination process has various problems of layer deformation, misalignment, and delamination. In particular, Liquid Crystal Polymer (LCP) causes more severe interlayer distortion because it needs a higher lamination temperature than other thermoplastic materials. To solve this, three different types of compression methods were proposed to build an LCP-based 5G patch: Batch (BC), Partial (PC), and Thermal-Partial compression (TPC). The antenna was successfully fabricated using the TPC process showing antenna performance at 28 GHz (low band) and 39 GHz (high band). Furthermore, results proved that circuit alignment of the antenna was influenced by lamination temperature and compression order.

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confidence: 99%

Thermal-Partial Compression Process: Bypass Route for Multilayer Lamination of Liquid Crystal Polymer-Based 5G Patch Antenna Fabrication

Jeong

Hong

Sung

et al. 2022

ACS Appl. Eng. Mater.

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Large spontaneous deformation of uniaxially oriented main-chain liquid–crystalline elastomers composed of BB-nmesogens

2016

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We observed the spontaneous shape change of a uniaxially oriented liquid-crystalline elastomer composed of smectic main-chain liquid-crystalline polyesters in a cyclic heating-cooling process. Although the elastomer contracted by about 650% on heating up to the isotropic phase, the sample length recovered by about 450% on cooling to room temperature in the first heatingcooling process. In contrast, the elastomer exhibited completely reversible deformation in the second heating-cooling process. The shape change occurred with almost no change in the orientational order of mesogens in the temperature region of the liquid-crystalline phase. The mechanism of the spontaneous thermotropic shape change is discussed. ARTICLE HISTORY

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Liquid Crystal Polymer Networks: Toward Soft Actuators and Dynamic Surface Reliefs

Cited by 2 publications

References 46 publications

Thermal-Partial Compression Process: Bypass Route for Multilayer Lamination of Liquid Crystal Polymer-Based 5G Patch Antenna Fabrication

Thermal-Partial Compression Process: Bypass Route for Multilayer Lamination of Liquid Crystal Polymer-Based 5G Patch Antenna Fabrication

Large spontaneous deformation of uniaxially oriented main-chain liquid–crystalline elastomers composed of BB-nmesogens

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