Thermogravimetric and spectrometric characterizations of poly(styrene-co-divinylbenzene) containing phosphinic and phosphonic acid groups

• Published in: Polymer engineering and science Vol. 48; no. 10; pp. 1897 - 1900
• Main Authors: de Santa Maria, Luiz Claudio, Souza, Marcelo A.V., Santos, Fábio R., Rubenich, Lorna M.S., Ferreira, Maria D.J.F., Sá, Rita M.P.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.10.2008; Wiley; Society of Plastics Engineers, Inc; Blackwell Publishing Ltd
• Subjects: Applied sciences; Chemical properties; Chemical synthesis; Copolymers; Crosslinked polymers; Exact sciences and technology; Exchange resins and membranes; Forms of application and semi-finished materials; Methods; Polymer industry, paints, wood; Polymer networks; Polystyrene; Resins; Technology of polymers; Thermal properties; Thermogravimetric analysis; Thermogravimetry; Brazil; Crosslinked copolymer; Thermal properties; Benzene(divinyl) copolymer; Chemical modification; Phosphorus copolymer; Cationic resin; Electrophilic substitution; Styrene derivative copolymer; Experimental study; Aromatic substitution; Thermal stability; Styrene copolymer
• ISSN: 0032-3888; 1548-2634
• DOI: 10.1002/pen.21048

Derivatized poly(styrene‐co‐divinylbenzene) resins have been prepared from the commercial crosslinked polystyrene by the aromatic electrophilic substitution reaction using PCl3/AlCl3 or PCl5/AlCl3, followed by base‐promoted hydrolysis. The unmodified copolymer and their phosphored derivatives have been characterized by thermogravimetric (TG) analysis to evaluate their thermal stability in nitrogen atmosphere. The influence of phosphorylation and phosphonation of crosslinked copolymer on its thermal behavior was evaluated. The TG and DTG curves of modified copolymers have clearly shown two thermal degradation stages. The modified copolymers have presented higher thermal stability than unmodified one, showing that the introduction of phosphinic or phosphonic acid groups modifies their kinetic pathways. The decomposition temperatures and thermal stability were dependent on the phosphorous amount incorporated on the commercial resin. The modified copolymers were also evaluated by spectrometric method (FTIR, using KBr pellet). The phosphorous content of the modified copolymers was determined by colorimetric method based on sodium molybdate reagent (determination at 830 nm). POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers