Two Types of Mechanism of Electrorheological Effect in Polymer Blends

1999 ◽  
Vol 13 (14n16) ◽  
pp. 1949-1955 ◽  
Author(s):  
H. Orihara ◽  
M. Doi ◽  
Y. Ishibashi
Keyword(s):  
Polymer Blends ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Side Chain ◽  
Crystalline Polymers ◽  
Electrorheological Effect ◽  
Different Types ◽  
The Relationship ◽  
Electrorheological Properties ◽  
Chain Type

We have found two different types of mechanism of electrorheological (ER) effect observed in polymer blends of side-chain type liquid crystalline polymers and a dimethylsiloxane, and clarified the relationship between the ER effect and the structure. On the basis of their mechanisms we discuss the electrorheological properties of these two blends.

Enhanced permittivity in polymer blends via tailoring the orderliness of semiconductive liquid crystalline polymers and intermolecular interactions

2020 ◽  
Vol 8 (25) ◽  
pp. 8440-8450 ◽  
Author(s):  
Kun Qian ◽  
Rui Qiao ◽  
Sheng Chen ◽  
Hang Luo ◽  
Dou Zhang
Keyword(s):  
Dielectric Properties ◽  
Polymer Blends ◽  
Intermolecular Interactions ◽  
Polymer Matrix ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Side Chain ◽  
Blend Films ◽  
Crystalline Polymers ◽  
P Type

The dielectric properties of PVDF blend films with P-type triphenylene discotic side-chain liquid crystalline polymers (TD-SCLCPs) are dependent on the orderliness of TD-SCLCPs and the compatibility between polymer matrix and TD-SCLCPs.

Side chain type ionic liquid crystalline polymers having high Preliminary communication molecular weight

2000 ◽  
Vol 27 (10) ◽  
pp. 1393-1397 ◽  
Author(s):  
Yuichiro Haramoto ◽  
Yoshiharu Kusakabe ◽  
Masato Nanasawa ◽  
Seiji Ujiie ◽  
Stephan Mang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Ionic Liquid ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Side Chain ◽  
Crystalline Polymers ◽  
Preliminary Communication ◽  
Chain Type

ELECTRORHEOLOGICAL EFFECT OF LIQUID CRYSTALLINE POLYMERS

1996 ◽  
Vol 10 (23n24) ◽  
pp. 3191-3200 ◽  
Author(s):  
AKIO INOUE ◽  
SYUNJI MANIWA ◽  
YOICHIROH IDE ◽  
HIROJI ODA
Keyword(s):  
Shear Stress ◽  
Electric Field ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Side Chain ◽  
Shear Stresses ◽  
Spacer Length ◽  
Crystalline Polymers ◽  
Electrorheological Effect ◽  
Base Polymer

A series of side chain liquid crystalline polymers (LCPs) containing different spacer length and various terminal structures has been prepared and their electrorheological (ER) effect has been investigated. Although the LCP itself showed small ER effect, a mixture of the LCP with a plain polydimethylsiloxane (PDMS) oil was found to show a large increase in shear stress upon application of an electric field. The shear stresses under DC 2 kV/mm of an electric field were 14 to 4 times those without the application of an electric field over the temperature range of 30 to 160 °C for a 2:1 mixture (by weight) of a LCP containing an oxyethylene spacer and a mesogen based on 4-cyanophenyl benzoate with PDMS. Two mechanisms responsible for the generation of the ER effect was suggested from the investigation using phenyl-substituted PDMS and an analysis by DSC: oriented LC network induction, and phase separation between the LC base polymer and PDMS.

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