Cover Page June-2014-Advanced Materials Letters

Advanced Materials Letters

Volume 5, Issue 6, Pages 333-338, June 2014
About Cover


Synthesis, Characterization And Mesomorphic Properties of Side Chain Liquid Crystalline Oligomer Having Schiff Base Type Mesogenic Group

H. E. Gulbas1*, D. G. Coskun2,  Y. H. Gursel3, B. Bilgin-Eran2

1Usak University, Banaz Vocational School, Chemical Tehcnology Department, 64500 Banaz, Usak, Turkey

2Yildiz Technical University, Department of Chemistry, Davutpaşa, 34210 Esenler, Istanbul, Turkey

3Istanbul Technical  University, Department of Chemistry, 34469 Maslak, Istanbul, Turkey

Adv. Mater. Lett., 2014, 5 (6), pp 333-338

DOI: 10.5185/amlett.2014.amwc.1022

Publication Date (Web): Mar 23, 2014

E-mail: hulyaelmali@yahoo.com

Abstract

A new liquid crystalline oligomer OLC was synthesized from its monomer having Schiff-base type mesogenic group MLC via free radical polymerization. The chemical structures of all compounds were confirmed using UV, FTIR, 1H NMR, 13C NMR and MS spectroscopy. Schiff-base type thermotropic system based on side chain oligomer containing long aliphatic branching was studied to determine the change in mesophase behaviour of the Schiff-base type mesogenic groups. A combination of differantial scanning calorimetry (DSC) and polarize optical microscopy (POM) demonstrated that the oligomer behaves similar to its monomer and both of them exhibit enantiotropic SmC and monotropic SmX mesophases. The oligomerization of the liquid crystal monomer gives rise to decreased transition temperatures whereas it has no influence on the type and stability of the mesophase formed. Namely, simply through oligomerization, we can greatly vary transition temperatures of the mesogenic groups.

Keywords

Liquid crystal, schiff base, liquid crystal homopolymers, side chain liquid crystalline oligomer.

Previous issues

Current Global Scenario of Electric Vehicles

Review on Detection of Phenol in Water 

Investigating the Machinability of Metallic Matrix Composites Reinforced by Carbon Nanotubes: A Review

Photocatalytic ZnO based PES Membranes for AOP Water Treatments under UV and Sunlight

Plasma Activated Water as a Source of Nitrogen for Algae Growth

Digital Light Processing (DLP) 3D Printing of Polyethylene Glycol (PEG) Biopolymer, Commercially available Ultra-High and Tough (UHT) Resin and Maghemite (γ-Fe2O3) Nanoparticles Mixture for Tissue Engineering Scaffold Application

Fabrication of Nanoparticle Embedded Polymeric Microbeads as an Efficient Drug Delivery System

Micro/Nanostructured Papers from Bagasse Pulp Reinforced by Nanofibrillated Cellulose from different Agro-Waste Sources

Structural, Optical and Magnetic Properties of Pristine, (Mn, Al) co-doped ZnO Nanocrystallites Synthesized via co-Precipitation Method

Nanosecond Laser Surface Patterning of Ti6Al4V Bio-alloy for Improved Biological Performance

Synthesis of Cu2O/Ag Composite Nanocubes with Promising Photoluminescence and Photodegradation Activity over Methylene Blue Dye

Locally available Clays of Bangladesh as a Replacement of imported Clays for Ceramic Industries 

Green Synthesis and Characterization of Silver Nanoparticles using Cassia auriculata Leaves Extract and Its Efficacy as A Potential Antibacterial and Cytotoxic Effect

Upcoming Congress

Knowledge Experience at Sea TM