Synthesis of poly(urethane)s based on diphenyl-silane/germane and oxyphenyl units: Structure-properties relationship

Tundidor?Camba, A.; Terraza, C. A.; Tagle, L. H.; Coll, D.; Ortiz, P

Abstract

A series of poly(urethane)s (PUs) based on diphenyl-silane or -germane and oxyphenyl units were synthesized by polycondesation of 4-[4-[9-[4-(4- aminophenoxy)-3-methyl-phenyl]fluoren-9-yl]-2-methyl-phenoxy]aniline (3) and four bis(chloroformate)s (I-IV). These monomers were prepared and characterized in previous works. The best conditions for the polymerization reactions were investigated by a kinetic study. Also, a selection of the best solvent for the reaction was developed. Polymers were characterized by IR and 1H, 13C, and 29Si-NMR spectroscopy and the results were in agreement with the proposed structures. Poly(urethane)s showed inherent viscosity values between 0.12 and 0.31 dL/g, indicative of low molecular weight species, probably of oligomeric nature. The glass transition temperature (T g) values were observed in the 127-168°C range by DSC analysis. Thermal decomposition temperature (TDT 10%) values were above 300°C. All PUs showed good transparency in the visible region (>80% at 350 nm) due to the incorporation of the bulky monomer (fluorene) and oxyether linkages. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012.

Más información

Título según WOS: Synthesis of poly(urethane)s based on diphenyl-silane/germane and oxyphenyl units: Structure-properties relationship
Título según SCOPUS: Synthesis of poly(urethane)s based on diphenyl-silane/germane and oxyphenyl units: Structure-properties relationship
Título de la Revista: JOURNAL OF APPLIED POLYMER SCIENCE
Volumen: 124
Número: 2
Editorial: Wiley
Fecha de publicación: 2012
Página de inicio: 1036
Página final: 1041
Idioma: English
URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-84855352622&partnerID=40&md5=3c8568239cf480bfbca962bc148c4b4d
DOI:

10.1002/app.35185

Notas: ISI, SCOPUS