Water sorption and electrical/dielectric properties of organic-inorganic polymer blends

• Published in: Macromolecular symposia. Vol. 198; no. 1; pp. 449 - 460
• Main Authors: Mamunya, Yevgen, Kanapitsas, Athanasios, Pissis, Polycarpos, Boiteux, Gisele, Lebedev, Eugene
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.08.2003; WILEY‐VCH Verlag
• Subjects: blends; Conductivity; Dielectric properties; Electrical resistivity; hydrophilic polymers; mechanical properties; Molecular weight; Oligomers; Polymer blends; Resistivity; Sorption; water sorption
• ISSN: 1022-1360; 1521-3900
• DOI: 10.1002/masy.200350838

Organic‐inorganic polymer blends (OIPB) were obtained by reaction of organic and inorganic oligomers. The organic oligomer was synthesized with 2,4‐toluene diisocyanate (TDI) and oligooxypropylene glycols (OPG) with various molecular weights (MW). The inorganic component was a water solution of sodium silicate. The OIPB obtained are hydrophilic and have great water sorption ability (the relative weight of sorbed water reaches 2000 %). The kinetics of water sorption and the changes of electrical conductivity during sorption were studied. Sorption ability, and mechanical, electrical and dielectric properties of OIPB depend on molecular weight of OPG: conductivity increases with increasing MW, whereas the sorption ability correlates with the mechanical properties. The influence of the inorganic phase content on the electrical and dielectric properties was studied as well.