Advances in synthetic optically active condensation polymers - A review

Abstract

Abstract. The study of optically active polymers is a very active research field, and these materials have exhibited a number of interesting properties. Much of the attention in chiral polymers results from the potential of these materials for several specialized utilizations that are chiral matrices for asymmetric synthesis, chiral stationary phases for the separation of racemic mixtures, synthetic molecular receptors and chiral liquid crystals for ferroelectric and nonlinear optical applications. Recently, highly efficient methodologies and catalysts have been developed to synthesize various kinds of optically active compounds. Some of them can be applied to chiral polymer synthesis. In a few synthetic approaches for optically active polymers, chiral monomer polymerization has essential advantages in applicability of monomer, apart from both asymmetric polymerization of achiral or prochiral monomers and enantioselective polymerization of a racemic monomer mixture. The following are the up to date successful approaches to the chiral synthetic polymers by condensation polymerization reaction of chiral monomers.

Synthesis and characterization of poly(ester amide) from remewable resources through melt polycondensation

“…Nylon 11 and poly(lactic acid) (PLA) have attracted great interest since they can be produced from renewable resources, that is, the beginning material for nylon 11 is castor oil [1,2] and these for PLA can be starch, cane molasses and beet sugar [3,4]. Poly(ester amide)s (PEAs) are a class of very promising materials combining the favorable properties of polyesters (biodegradability) and polyamides (good mechanical and thermal behavior) [5]. The rigidity due to the double-bond character of the amide group coupled with extensive hydrogen bonding influences the ordering of PEAs and consequently enhances the mechanical and thermal stability.…”

Effect of modified ZnO capped withN-trimellitylimido-L-alanine diacid as an optically active coupling agent on the morphology and thermal properties of poly (amide-imide)/ZnO nanocomposites

“…[1,2] Polyimide derivatives such as poly(amide-imides) (PAIs) are very valuable high-performance materials that have flexible bridging linkages and bulky pendant groups with excellent mechanical properties, high thermal stability, good chemical resistance, and low flammability. [3][4][5] They show wide potential applications in different areas such as plastics, adhesives, electronic wire coatings, films, and membranes. [6,7] On the other hand, chiral PAIs are of special attention from the point of view of material science, because a high degree of amino acid functionality and chirality can lead to polymers with enhanced solubility, biocompatibility, and biodegradability.…”

“…[8,9] For these manifest properties, they are selected as a matrix in the NCs technology. [4] Ionic liquids (ILs) are materials that are composed of ions. They are in liquid state at close to room temperature and have recently created a lot of interest as possible environmentally safe in a wide variety of polymerization reactions.…”

In vitrostudies on biodegradable chiral nanostructure poly(amide-imide)s containing different natural amino acids in green medium

“…Incorporation of amino acids into a polymeric backbone is useful because the amino acids are naturally occurring compounds, and therefore synthetic polymers based on these amino acids are anticipated to be nontoxic, biocompatible, and biodegradable. [10][11][12][13] It seems that poly(amide imide)s (PAIs) with chiral structures based on amino acids are highly biodegradable. Also, PAIs are an important class of material having excellent resistance to high temperatures and favorable balance of other physical and chemical properties.…”