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Thermal Properties of Epoxy Resin/Layered Double Hydroxide Intercalated Nanocomposites

Ivan BRNARDIĆ ; Metalurški fakultet, Sveučilište u Zagrebu, Zagreb
Zvonimir MATUSINOVIĆ ; Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu, Zagreb
Juraj ŠIPUŠIĆ ; Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu, Zagreb
Jelena MACAN orcid.org/0000-0003-0614-194X ; Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu, Zagreb

Sažetak

Ca-Al layered double hydroxide (LDH) modifi ed by the incorporation of benzoate anions (Ca4Al2(OH)12(C6H5COO)2 · x H2O, LDH-B) was prepared by a variation of the rehydration method, by adding benzoic acid and CaO into a mixture of water and acetone used to convert tricalcium aluminate (Ca3Al2O6) into fi nal layered structure. Intercalation of benzoate anions within LDH layers was confi rmed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). Intercalated nanocomposites based on an epoxy resin and LDH-B were prepared by in situ polymerisation, with poly(oxypropylene) diamine as a curing agent. Nanocomposites prepared with different contents of LDH-B (5, 10 and 15 phr) were characterised by XRD, FTIR, TGA, differential scanning calorimetry and transmission electron microscopy (TEM). The XRD results indicated formation of intercalated nanocomposites, and TEM analysis confi rmed that LDH-B was dispersed within the matrix forming an intercalated structure, which becomes partially exfoliated in the nanocomposite with 5 phr fi ller. Results of thermal analysis showed detrimental infl uence on initial degradation temperature in comparison to the neat crosslinked epoxy, while residue at 1,000°C increases, especially for the partially exfoliated nanocomposite. The glass transition temperature decreases in comparison with the neat crosslinked epoxy, indicating poorer crosslinking of the epoxy matrix.

Ključne riječi

epoxy resin; intercalated nanocomposite; layered double hydroxide (LDH); morphology; thermal properties

Hrčak ID:

97713

URI

https://hrcak.srce.hr/97713

Datum izdavanja:

27.2.2013.

Podaci na drugim jezicima: hrvatski

Posjeta: 2.987 *