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首页> 外文期刊>Journal of Applied Polymer Science >Alendronic acid bearing ketone-formaldehyde resin and clay nanocomposites for fire-retardant polyurethanes
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Alendronic acid bearing ketone-formaldehyde resin and clay nanocomposites for fire-retardant polyurethanes

机译：轴承酮甲醛树脂和粘土纳米复合材料用于阻燃聚氨酯

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摘要

Cyclohexanone-formaldehyde resin and acetophenone-formaldehyde resin were in situ modified with sodium alendronate and the nanocomposites of cyclohexanone-formaldehyde resin with sepiolite and montmorillonite by adding the nanoclay into the resin formation media. The analysis of nanocomposites of nanoclay in the resin were carried out with X-ray diffraction. Exfoliated nanocomposites containing as much as 5 wt% sepiolite were obtained while the nanocomposites of montmorillonite were intercalated. The nanocomposites of alendronic acid-modified ketone-formaldehyde resin containing as much as 20 wt% sepiolite or 10 wt% montmorillonite were successfully produced in situ. Fourier transform infrared and nuclear magnetic resonance spectroscopies (NMR) were used for the structural characterization of the modified resins. The alendronic acid modified resins and their nanocomposites with the clays were used to produce reactive non-toxic fire retardant rigid polyurethane foam. The polyurethane foam containing alendronic acid-modified acetophenone-formaldehyde resin had a residue of 20% in the thermogravimetric analysis and was HB-grade in the horizontal fire test (HB) and self-extinguished in about 3-5 s during the test. Polyurethane foams containing alendronic acid and the nanoclay with the limiting oxygen index value of 20.8 were achieved.
机译：通过在树脂形成介质中加入纳米粘土，用阿仑膦酸钠和环己酮-甲醛树脂与海泡石、蒙脱土的纳米复合材料对环己酮-甲醛树脂和苯乙酮-甲醛树脂进行原位改性。用X射线衍射分析了树脂中纳米粘土的纳米复合材料。在插层蒙脱土纳米复合材料的同时，获得了含有高达5 wt%海泡石的剥离纳米复合材料。成功地原位制备了含20%海泡石或10%蒙脱土的阿仑膦酸改性酮醛树脂纳米复合材料。傅立叶变换红外光谱和核磁共振光谱（NMR）用于改性树脂的结构表征。将阿仑膦酸改性树脂及其与粘土的纳米复合材料用于制备反应性无毒阻燃硬质聚氨酯泡沫。含有阿仑膦酸改性苯乙酮甲醛树脂的聚氨酯泡沫在热重分析中的残留量为20%，在水平燃烧试验（HB）中为HB级，并在试验期间约3-5 s内自行熄灭。得到了含阿仑膦酸和纳米粘土的聚氨酯泡沫，极限氧指数为20.8。

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