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Flame retardance and thermal properties of a novel phosphorus-containing unsaturated polyester resin/SiO2 hybrid nanocomposite
A novel phosphorus-containing unsaturated polyester resin/SiO2 hybrid nanocomposite was prepared from the in-situ curing of UP (unsaturated polyester resin) and DI (triethoxysilane) which was synthesised from the nucleophilic addition reaction of DOPO (9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide) and icteos (3-(triethoxysilyl) isocyanate). The formation of UP-DI (unsaturated polyester resin/SiO2 hybrid nanocomposite) was confirmed by FTIR (Fourier infrared spectra) and SEM (scanning electron microscopy). With the increase of DI contents, the LOI (limiting oxygen index) value of the cured UP-DIs was raised from 19 to 29, suggesting a significant improvement in flame retardance. The improved flame retardance could also be revealed by the variations of weight and morphology of char residues. TGA (thermogravimetric analysis) both in air and in nitrogen was used to estimate mechanism of thermal degradation and Ea (activation energy) of different alpha (degree of conversion) was calculated by Ozawa's method. The UP-DI10 (UP-DI containing 10 % DI) had higher Ea than the pure UP as alpha >5 % because the degradation mechanism was altered by the incorporation of DI.
Flame retardance and thermal properties of a novel phosphorus-containing unsaturated polyester resin/SiO2 hybrid nanocomposite
A novel phosphorus-containing unsaturated polyester resin/SiO2 hybrid nanocomposite was prepared from the in-situ curing of UP (unsaturated polyester resin) and DI (triethoxysilane) which was synthesised from the nucleophilic addition reaction of DOPO (9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide) and icteos (3-(triethoxysilyl) isocyanate). The formation of UP-DI (unsaturated polyester resin/SiO2 hybrid nanocomposite) was confirmed by FTIR (Fourier infrared spectra) and SEM (scanning electron microscopy). With the increase of DI contents, the LOI (limiting oxygen index) value of the cured UP-DIs was raised from 19 to 29, suggesting a significant improvement in flame retardance. The improved flame retardance could also be revealed by the variations of weight and morphology of char residues. TGA (thermogravimetric analysis) both in air and in nitrogen was used to estimate mechanism of thermal degradation and Ea (activation energy) of different alpha (degree of conversion) was calculated by Ozawa's method. The UP-DI10 (UP-DI containing 10 % DI) had higher Ea than the pure UP as alpha >5 % because the degradation mechanism was altered by the incorporation of DI.
Flame retardance and thermal properties of a novel phosphorus-containing unsaturated polyester resin/SiO2 hybrid nanocomposite
Zhang, Chen (author) / Liu, Shu Mei (author) / Huang, Jun Yi (author) / Zhao, Jian Qing (author)
e-Polymers ; 1-12
2009
12 Seiten, 7 Bilder, 2 Tabellen, 32 Quellen
Article (Journal)
English
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