The influence of non-polar group on the properties of poly-siloxanes side chain liquid crystal polymers
Joint Authors
al-Ammar, Khalid Hasan
Ubayd, Ahmad Najm
Hashim, Fuad Shakir
Source
Journal of Babylon University : Journal of Applied and Pure Sciences
Issue
Vol. 24, Issue 3 (30 Sep. 2016), pp.727-739, 13 p.
Publisher
Publication Date
2016-09-30
Country of Publication
Iraq
No. of Pages
13
Main Subjects
Topics
Abstract EN
The purpose of this work is to know the effect of adding non-Polar group to a group of polymers based on the poly-siloxane backbone.
It is found that adding the non-polar group would reduce the contribution of the dipole moment of the cyano - group parallel to the molecular long axis of the mesogenic unit and lead to a suppression of dielectric anisotropic (Δε) for the system.
The five samples different molecular weight and equal flexible spacer have been prepared.
The intensity coming out of the polarizer be high E=0 but when apply a little of the electric field reduced intensity.
The complete switching voltage increases with increasing molecular weight.
The increase in temperature leads to decrease in response times (on, off) which is due to the decrease in the viscosity of the polymer.
The increases order parameter whenever decreases molecular weight, this was attributed to the degree of cross-link that get in the molecules of the material are few.
The effect of the low molecular weight of the polymer reduces the threshold voltage and that it is possible to have relationship an increase flexible spacer of polymer.
American Psychological Association (APA)
Ubayd, Ahmad Najm& al-Ammar, Khalid Hasan& Hashim, Fuad Shakir. 2016. The influence of non-polar group on the properties of poly-siloxanes side chain liquid crystal polymers. Journal of Babylon University : Journal of Applied and Pure Sciences،Vol. 24, no. 3, pp.727-739.
https://search.emarefa.net/detail/BIM-696552
Modern Language Association (MLA)
Ubayd, Ahmad Najm…[et al.]. The influence of non-polar group on the properties of poly-siloxanes side chain liquid crystal polymers. Journal of Babylon University : Journal of Applied and Pure Sciences Vol. 24, no. 3 (2016), pp.727-739.
https://search.emarefa.net/detail/BIM-696552
American Medical Association (AMA)
Ubayd, Ahmad Najm& al-Ammar, Khalid Hasan& Hashim, Fuad Shakir. The influence of non-polar group on the properties of poly-siloxanes side chain liquid crystal polymers. Journal of Babylon University : Journal of Applied and Pure Sciences. 2016. Vol. 24, no. 3, pp.727-739.
https://search.emarefa.net/detail/BIM-696552
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 739
Record ID
BIM-696552