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Hydrolytic, thermal, and UV stability of urea‐formaldehyde resin/thermally activated montmorillonite nanocomposites
Polymer Composites ( IF 4.8 ) Pub Date : 2020-05-27 , DOI: 10.1002/pc.25644 Suzana Samaržija‐Jovanović 1 , Vojislav Jovanović 1 , Branka Petković 1 , Tijana Jovanović 2 , Gordana Marković 3 , Slavica Porobić 4 , Jelena Papan 4 , Milena Marinović‐Cincović 4
Polymer Composites ( IF 4.8 ) Pub Date : 2020-05-27 , DOI: 10.1002/pc.25644 Suzana Samaržija‐Jovanović 1 , Vojislav Jovanović 1 , Branka Petković 1 , Tijana Jovanović 2 , Gordana Marković 3 , Slavica Porobić 4 , Jelena Papan 4 , Milena Marinović‐Cincović 4
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Urea‐formaldehyde resin (F/U ratio of 0.8)/thermally activated montmorillonite (UF/ΔTK10) nanocomposite was synthesized. The hydrolytical, thermal, and UV radiation stability of UF/ΔTK10 nanocomposites are determined. UF hybrid nanocomposites have been irradiated with UV light with a wavelength of 254 nm and 366 nm, and after that, their radiation stability was evaluated. The free formaldehyde (FA) percentage in all prepared samples was determined. The sample was characterized by using X‐ray diffraction analysis (XRD), nonisothermal thermogravimetric analysis (TGA), differential thermal analysis (DTA), and differential thermal gravimetry (DTG), with infrared (FTIR) spectroscopy. Crosslinked UF/ΔTK10 nanocomposite shows the highest resistance to acid hydrolysis after UV irradiation at a wavelength of 254 nm. The values for T5% are identical for the unirradiated and UV irradiated (wavelength of 366 nm) UF/ΔTK10 nanocomposite. It can be concluded that this sample is thermally most stable and shows good resistance to UV irradiation.
中文翻译：
脲醛树脂/热活化蒙脱土纳米复合材料的水解，热和紫外线稳定性
合成了脲醛树脂（F / U比为0.8）/热活化蒙脱土（UF /ΔTK10）纳米复合材料。确定了UF /ΔTK10纳米复合材料的水解，热和紫外线辐射稳定性。用波长为254 nm和366 nm的UV光辐照UF杂化纳米复合材料，然后评估其辐射稳定性。测定所有制备样品中的游离甲醛（FA）百分比。通过X射线衍射分析（XRD），非等温热重分析（TGA），差示热分析（DTA）和差示热重分析（DTG）和红外（FTIR）光谱对样品进行表征。交联的UF /ΔTK10纳米复合材料在254 nm波长的紫外线照射后显示出最高的耐酸水解性。的值对于未辐照和紫外线辐照（366 nm波长）UF /ΔTK10纳米复合材料，T 5％相同。可以得出结论，该样品是热最稳定的，并且显示出良好的抗紫外线辐射性。
更新日期：2020-05-27
中文翻译：
脲醛树脂/热活化蒙脱土纳米复合材料的水解，热和紫外线稳定性
合成了脲醛树脂（F / U比为0.8）/热活化蒙脱土（UF /ΔTK10）纳米复合材料。确定了UF /ΔTK10纳米复合材料的水解，热和紫外线辐射稳定性。用波长为254 nm和366 nm的UV光辐照UF杂化纳米复合材料，然后评估其辐射稳定性。测定所有制备样品中的游离甲醛（FA）百分比。通过X射线衍射分析（XRD），非等温热重分析（TGA），差示热分析（DTA）和差示热重分析（DTG）和红外（FTIR）光谱对样品进行表征。交联的UF /ΔTK10纳米复合材料在254 nm波长的紫外线照射后显示出最高的耐酸水解性。的值对于未辐照和紫外线辐照（366 nm波长）UF /ΔTK10纳米复合材料，T 5％相同。可以得出结论，该样品是热最稳定的，并且显示出良好的抗紫外线辐射性。
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