Synthesis and Characterization of Block Copolymers from Poly(p-benzamide) and Poly(propylene glycol)

• Published in: Macromolecular chemistry and physics Vol. 202; no. 7; pp. 1053 - 1059
• Main Authors: Rivas, Bernabé L., Canessa, Guido S., Luna, Maribel, Rabagliati, Franco M., Novi, Marino, Preston, Jack
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag GmbH 01.04.2001; WILEY‐VCH Verlag GmbH; Wiley
• Subjects: Applied sciences; Chemical modifications; Chemical reactions and properties; Exact sciences and technology; Organic polymers; Physicochemistry of polymers; Condensation reaction; End group; Ether copolymer; Experimental study; Thermal stability; Benzamide copolymer; Chemical modification; Propylene oxide polymer; Preparation; Amide copolymer; Diblock copolymer; Polybenzamide; Propylene oxide copolymer
• ISSN: 1022-1352; 1521-3935
• DOI: 10.1002/1521-3935(20010401)202:7<1053::AID-MACP1053>3.0.CO;2-X

Block copolymers containing a rigid poly(p‐benzamide) and a flexible poly(propylene glycol) segment were synthesized by coupling aniline terminated poly(p‐benzamide) with either poly(propylene glycol) or poly‐(propylene glycol) monobutyl ether activated with terminal p‐(chlorocarbonyl)benzoyl end‐groups. These coupling reactions were carried out at temperatures between –22°C and 40°C, with various feed reagent ratios. To eliminate the low molecular weight fractions of homopolymers and copolymers, a solubility criterion at constant temperature was used. At 30°C it is possible separate a soluble and insoluble fraction in DMAc. The molecular weight of the soluble fractions ranged between 9 300 and 13 100 g/mol. All the copolymers were characterized by FT‐IR spectroscopy, thermal analysis, and viscosity.