Synthesis and characterization of poly(amide sulfonamide)s (PASAs)

Abstract

New diamino monomers IIa–IIg were synthesized in a two‐step reaction sequence starting from p‐acetamidobenzenesulfonyl chloride. Solution polymerization of these monomers in DMAC with terephthaloyl or isophthaloyl chloride resulted in the formation of a series of 14 poly(amide sulfonamide)s (PASAs) in excellent yield (> 95%). The polymers have in‐trinsic viscosities of 0.32–1.11 dL g−1. Except for polymers IIIa−p and IIId‐p, all other PASAs were readily soluble in aprotic polar solvents including DMAC, DMF, and DMSO. Thermogravimetric analyses of the polymers showed moderate thermal stability with 10% weight loss being recorded in the range of 325–408°C. In addition, these polymers exhibit moderate chemical stabilities toward alkali, acidic, and chromic acid solution. © 1995 John Wiley & Sons, Inc.

Evaluation of the possibility of utilization of poly(amidesulfonamide)s (PASAs) in ultrafiltration technology

“…Dimethsized from the selected diamino monomer and terylacetamide (DMAc) (Redel-de Haën) was dried by ephthaloyl or isophthaloyl by the low-temperamolecular sieve 4 Å (Merck) and, isophthaloyl and ture polycondensation method. 6,7 The structures terephthaloyl chlorides (Fluka) were purified by of the studied PASAs are as follows: vacuum distillation before use. Serum albumin (Bovine, Fraction V) was purchased from ICN Biomedicals and stored at 4ЊC before use.…”

“…1 In addition to has been committed to developing new synthetic microfiltration and reverse osmosis technology, materials for the preparation of separation mem-UF is a promising technology for industrial pollubranes, and recently, a series of new polymeric tion abatement 2 and may reduce production cost materials, poly(amidesulfonamide)s (PASAs), was by recovery of some useful materials from waste successfully synthesized in our laboratory. [5][6][7][8] PAwater of various industrial processes. 3 Moreover, SAs with film-forming viscosities exhibit strong me-UF technology is often used in food industry prochanical strength, high hydrophilicity, outstanding cesses.…”

Synthesis, characterization, and pervaporation performance of random copolymers of poly(amidesulfonamide)s (PASAs)

“…In response to this research challenge, we have synthesized and characterized a new series of homopolymers and copolymers of poly(amidesulfonamide)s (PASAs). 2,3 They possess several desirable properties, as follows: high viscosity, capable of forming tough membranes; high chemical stabilities resistant to attack of strong acid and alkali; good thermal stabilities; and sufficient hydrophilicity, favoring the permeation of water flux. Furthermore, their applications in RO process were demonstrated.…”

Growth Stimulant Agents and Bactericides

“…It easily reacts with both organic and inorganic compounds to form a number of valuable market products. This was the basis for the development of the Chemistry and chemical technology of inorganic and organic sulfur-containing compounds, including polymers [89][90][91][92][93].…”

“…As it is known, high yields depend on the photosynthetic activity of plants. The indicator is the leaf area, photosynthetic potential, the growth and increase of the entire aboveground biomass [92][93][94][95], maintenance of optimal ratios of abiotic factors, like, the light, heat, moisture, regime of carbon dioxide, and mineral nutrition, and others. In general, the amount of the output yield depends on the formation of the photosynthetic apparatus, namely, on the leaf area.…”