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Non‐Conventional Curing of Organic‐Inorganic Hybrids
Author(s) -
Leonelli Cristina,
Messori Massimo,
Pilati Francesco,
Veronesi Paolo
Publication year - 2005
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200551020
Subject(s) - overheating (electricity) , materials science , curing (chemistry) , microwave heating , microwave , isothermal process , chemical engineering , infrared heater , oxide , infrared , composite material , metallurgy , thermodynamics , physics , optics , quantum mechanics , engineering
Infrared and microwave curing of organic–inorganic hybrid materials was studied, in order to achieve the maximum conversion without detrimental effects due to the overheating or to the long‐time permanence at high temperature. Partially cured poly(ethylene oxide)/silica hybrids were prepared by hydrolysis and subsequent condensation of precursors for 30 minutes isothermal heat treatment at 70°C. The conversion after the preliminary treatment is still low and requires an additional heating to complete the reaction. Three different thermal treatments were investigated: conventional heating, infrared heating and microwave heating. DSC characterisation of the obtained samples evidenced a drastic reduction of the treatment time when microwaves were used, requiring only a few seconds, compared to the hours‐lasting conventional treatments.