X-ray mesophase investigation of a class of liquid crystalline side group polymers

Dietmar Wolff

doi:10.1117/12.235347

11 March 1996 X-ray mesophase investigation of a class of liquid crystalline side group polymers

Dietmar Wolff

Proceedings Volume 2651, Liquid Crystal Materials, Devices, and Applications IV; (1996) https://doi.org/10.1117/12.235347
Event: Electronic Imaging: Science and Technology, 1996, San Jose, CA, United States

Abstract

The phase behavior of liquid crystalline side group polymethacrylates with azo-chromophores in the mesogens was investigated. Layer periodicities (monolayers or bilayers) of the smectic phases depend on the spacer to tail length ratio. For the polymer where the layer periodicity changes from a monolayer to a bilayer two orthogonal smectic monolayer phases S_B and S_A1 are metastable. After annealing in the S_B phase a crystallization occurs. On annealing in the S_A1 phase a transformation into a bilayer S_C2 phase takes place. An arrangement of the mesogens in the S_A1 and S_C2 phases is proposed assuming steric hindrance of the side groups caused by the attachment to the polymethacrylate backbone and ataractic permanent dipolar-induced dipolar forces of neighboring side groups. To prove the results also samples with different dipole moments in the mesogens (ester- and amide- instead of azo-units) and in the tail groups (fluorinated) were studied.

Citation Download Citation

Dietmar Wolff "X-ray mesophase investigation of a class of liquid crystalline side group polymers", Proc. SPIE 2651, Liquid Crystal Materials, Devices, and Applications IV, (11 March 1996); https://doi.org/10.1117/12.235347

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available