Scientific journal NRU ITMO
Series "Processes and Food Production Equipment"
Registration certificate ЭЛ № ФС 77 – 55245 - 04.09.2013
registered by the Federal Inspectorate Service for Communication, Information Technologies and Communication Media
ISSN:2310-1164

2014 (published: 24.02.2014)

Number 1(19)

Home > Issue > Liquid Crystalline Polymers: Theories, Experiments and Nematodynamic Simulations of Shearing Flows

UDC 544.252

Liquid Crystalline Polymers: Theories, Experiments and Nematodynamic Simulations of Shearing Flows

Hongyan Chen, Leonov A.I.

Processing ofbioorganic foods (biopolymers) must be done based on the properties containing them lyotropic liquid crystals. More than thirty years of research on liquid crystalline polymers (LCP) resulted in a huge amount of publications on physics, constitutive modeling and experimental results, which are briefly reviewed in this article. To date, some theories have been experimentally verified but only for steady simple shearing cases. Thus the simulations shown in this article present the first attempt to describe the unsteady shearing rheological properties of LCP and more specifically, thermotropic type of LCP where till recently no constitutive modeling was known. Recently developed monodomain thermodynamic theory of weakly viscoelastic nematodynamics has been employed for simulations. Our simulations of steady and start up shearing flows with relaxation demonstrate at least a semi-quantitative agreement with experimental data for two industrial and two model LCP, although the model LCP exhibit the polydomain features. Established dependencies of fitted theoretical parameters on temperature and structure of LCP have also been discussed.
Read the full article 

Keywords: liquid crystal polymers, nematodynamics, viscoelasticity

Editorial address:
191002, St. Petersburg, street. Lomonosova 9, office. 2132

Information 2006-2024, All rights reserved
Development by ITMO University © 2013
Яндекс.Метрика