scholarly journals Observation of Phase Transition of Liquid Crystalline Polymers by Ultrasonic Method. (Hydroxypropyl)cellulose and (n-Hexanoyloxypropyl)cellulose

1994 ◽  
Vol 26 (5) ◽  
pp. 599-605 ◽  
Author(s):  
Akira Tanaka ◽  
Yorihisa Hamada ◽  
Hiroshi Onoda ◽  
Takanari Yamaguchi ◽  
Koh-hei Nitta
Keyword(s):  
Phase Transition ◽  
Liquid Crystalline ◽  
Ultrasonic Method ◽  
Liquid Crystalline Polymers ◽  
Hydroxypropyl Cellulose ◽  
Crystalline Polymers

Development of light-emitting liquid-crystalline polymers with a pentafluorinated bistolane-based luminophore

2020 ◽  
Vol 44 (15) ◽  
pp. 5684-5691 ◽  
Author(s):  
Shigeyuki Yamada ◽  
Akira Mitsuda ◽  
Kaoru Adachi ◽  
Mitsuo Hara ◽  
Tsutomu Konno
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Liquid Crystalline ◽  
Dynamic Change ◽  
Liquid Crystalline Polymers ◽  
Light Emitting ◽  
Light Blue ◽  
Crystalline Polymers ◽  
Thermal Phase Transition ◽  
Thermal Phase

Light-emitting liquid-crystalline polymers showing PL in the pristine solid state can control their PL color from blue to light-blue via a thermal phase transition to LC phases, which originates from a dynamic change of aggregated structures.

Phase Transition Behavior of Main Chain Nematic Liquid-Crystalline Polymers Based on 2-methyl-1,4-bis[4-(4-pentenyloxy)benzoyl]hydroquinone and 2-tert-butyl-1,4-bis[4-(4-pentenyloxy)benzoyl]hydroquinone

2012 ◽  
Vol 1403 ◽  
Author(s):  
Christain Melchert ◽  
M. Behl ◽  
A. Lendlein
Keyword(s):  
Phase Transition ◽  
Nematic Phase ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Phase Transition Behavior ◽  
Scanning Calorimetry ◽  
Thermal Stabilities ◽  
Crystalline Polymers ◽  
Transition Behavior ◽  
X Ray Scattering

ABSTRACTThe control of phase transition behavior in liquid crystalline polymers could enable potential application in the field of actuators and sensors by enabling a higher actuator performance of liquid crystalline elastomers (LCE). In this context the phase transition behavior of siloxane based liquid crystalline copolymers synthesized from 1,1,3,3-tetramethyldisiloxane, 2-methyl-1,4-bis[4-(4-pentenyloxy)benzoyl]hydroquinone (M-MeHq), and 2-tert-butyl-1,4-bis[4-(4-pentenyloxy)benzoyl]hydroquinone (M-tBHq) was explored. The selected monomers provided different thermal stabilities of the nematic phase, while the non-flexible siloxane spacer suppressed a smectic phase. The mesogenic properties were studied by means of differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and wide angle X-ray scattering (WAXS). With increasing fraction of M-MeHq the nematic phase of the copolymer was stabilized and a tailoring of relatively low TNI was achieved.

A new approach to photorecording based on hindering a phase transition in photochromic chiral liquid crystalline polymers

1998 ◽  
Vol 24 (5) ◽  
pp. 759-767 ◽  
Author(s):  
M. V. KOZLOVSKY ◽  
V. P. SHIBAEV ◽  
A. I. STAKHANOV ◽  
T. WEYRAUCH ◽  
W. HAASE
Keyword(s):  
Phase Transition ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
New Approach ◽  
Crystalline Polymers
Sign in / Sign up

Export Citation Format

Share Document