Kinetics of the condensation reaction of carboxylated polymers activated by dicyclohexylcarbodiimide

Abstract

Kinetical studies were performed on the condensation reactions of 2‐aminopropane and two carboxylated polymers (poly(acrylic acid) and xanthan) in the presence of dicyclohexylcarbodiimide as an activator. The rate constants of the second order reactions were determined and discussed.

Preparation and characterization of pH‐sensitive, interpenetrating networks of poly(vinyl alcohol) and poly(acrylic acid)

“…In the equilibrium swelling studies, dried samples were placed in a solution of the desired p H (3)(4)(5)(6)(7)(8), ionic strength (0, 0.01, or O.lM), and temperature (25 or 37°C). The p H was adjusted by addition of hydrochloric acid or sodium acetate ( Mallinckrodt, Paris, KY) to water.…”

Oral manifestations in iron deficiency anemia: case reports

“…3). 5,6,7 The most complex and accessible microbial ecosystem of the human body lies in the oral cavity, there are about 700 species of known bacteria, at least 30 species of fungi (especially Candida) and several species of protozoa (associated with food bacteria) and some intracellular viruses. 8,9,10,11 In a healthy oral cavity, what is normally found is between 20-50 bacterial species, the number going up to 200-400, in case of disease.…”

Xanthan and Poly(vinyl alcohol) - Based Composite Films, as Supports for Chloramphenicol Immobilization

“…Natural polymers and their derivatives, especially polysaccharides, characterized by biocompatibility, biodegradability, absence of toxicity towards the living organisms, are mainly preferred [1][2][3]. The preparation of the polymer-drug conjugate may be made through various methods, which involve chemical (ionic or covalent) bonding of the drug, insertion into three-dimensional networks, encapsulation in micro -or nano-particles [4][5][6][7][8][9][10].…”