Synthesis and characterization of polyesters derived from polychlorinated aromatic diacids

Abstract

New, thermally stable polyesters with varying chlorine content were prepared by solution and interfacial polycondensation between chlorinated aromatic dichlorides (perchloroterephthaloyl dichloride, 2,5‐dichloroterephthaloyl dichloride, and perchloro‐4,4′‐dichloroformyl biphenyl with different aliphatic and aromatic diols). The polymers were characterized by infrared spectroscopy, elemental analysis, differential scanning calorimetry, and thermogravimetric analysis. Their solubilities and molecular weights were also determined. The influence of chlorine content on the thermal properties of the polymers is discussed.

Biodegradable nanofibrous scaffolds as smart delivery vehicles for amino acids

“…PE44 was prepared by the bulk thermal polycondensation of 1,4butanediol and succinic acid (diol/diacid molar ratio 5 2.2:1). 25 The synthetic route is summarized in Scheme 1. The chemical characterization, viscosity, and molecular masses were reported in our previous article.…”

Multi-Stimuli-Responsive Polymer Materials: Particles, Films, and Bulk Gels

“…For example, Koopmans and co-workers pointed out that stimuli-responsive gels displayed promising properties as selective soft nanoreactors and/or heterogeneous recyclable catalysts. [264] Thorough reviews on chemoresponsive gels can be found in papers reported by Balazs et al [265,266] and Escuder et al [267] For a more general review of stimuli-responsive gels based on different stimuli, such as redox, light, pH, and so on, interested readers can refer to Park et al, [268] Kasi et al, [269] and Zhang et al [270] The history, types, mechanisms, and applications of ultrasound and mechanical stress driven/responsive organogels have been reviewed by Yi and co-workers. [271] Of particular interest, multi-stimuli-responsive supramolecular gels are regarded as ideal templates for industrial and biological processes, while they have been rarely reviewed.…”