Review on: liquid crystalline polyazomethines polymers. Basics, syntheses and characterization

Abstract

Liquid crystalline behavior of polymeric materials is of considerable current interest in the last decades, but due to many different and distinct characteristics. Polyazomethines liquid crystalline polymers have received considerable attention due to their potential applications and considered as one of the most important liquid crystalline material produced. This review gives a simple introduction to liquid crystalline materials including definition and classification. Moreover, we will focus on the syntheses and properties of liquid crystalline polyazomethines with flexible spacers or hybrid liquid crystalline polyazomethines. Furthermore, give a general overview of thermotropic, mesophoric properties and texture observation for desired liquid crystalline polyazomethines were shown in details.

Thermally stable hybrid polyarylidene(azomethine-ether)s polymers (PAAP): an ultrasensitive arsenic(III) sensor approach

“…Our aim is to produce a new category of polyarylidene(azomethine – ether)s using solution polycondensation method [25–30]. These new polymers are produced by means of condensation reaction of azomethine monomers 1 a,b with diarylidenecycloalkanone monomers 4 a,b and 5 a,b in DMSO as well as in the presence of potassium carbonate anhydrous [58] as illustrated in Figure 4 .…”

“…The titled copolymers are also synthesized by solution polycondensation technique [25–30] using the procedure described in the literature [57] by the interaction of two moles of two varied diarylidenecycloalkanone monomers 4 a,b and 5 a,b (1:1 molar ratio) together with two moles of azomethine monomers 1 a,b in suitable amount of DMSO and in the presence of potassium carbonate anhydrous as well. (cf.…”

Synthesis of soluble oligsiloxane-end-capped hyperbranched polyazomethine and their application to CO2/N2 separation membranes

“…To overcome these problems, more precise design of chemical structures of polymers used for permselective membranes is needed. Polyazomethines ( PAZ ) are known for their excellent thermal stability, good mechanical strength, environmental resistance, and optoelectronic property [19–23]. PAZ s are usually synthesized from diamine and dialdehyde and therefore they have amine end groups.…”

Synthesis and characterization of fluorinated poly(azomethine ether)s from new core-fluorinated azomethine-containing monomers

“…They often display liquid crystalline (LC) behavior at room temperature as well as ability to form chelates with metals. [1][2][3][4][5][6][7][8] As a consequence, PAMs have a potential for numerous application in electronics, optoelectronics, photonics, and sensors. [6][7][8] PAMs can be synthesized in a traditional approach (also known as polyazomethine route) by a reaction of dialdehydes with diamines.…”