Attention to environmental problems and the importance of maintaining it have caused the researchers to pay more attention in this regard. The production of polymers and resins has increased in recent years and has affected by environmental pollution due to their long-term degradation. An appropriate solution to this problem is the synthesis of degradable and environmentally friendly polymers and resins. Using natural materials in the synthesis of polymers and resins can help them to be environmentally friendly. The purpose of this research is to synthesize urethane acrylate resins using natural resources. For this purpose, the urethane acrylate pre-polymer was synthesized with castor oil. Then, using modified zinc oxide nanoparticles with 1, 3 and 5 wt% urethane acrylate zinc oxide nanocomposites were produced. The use of castor oil as a degradable part and lack of organic solvent in radiation systems led to the creation of an environmentally friendly resin. Subsequently, the viscoelastic behavior of the prepared nanocomposite was evaluated. Spectrometry results confirm the synthesized resin structure. The morphology of nanocomposites confirmed the proper particle size distribution in a 3 wt.% sample. The results of the dynamic mechanical thermal analysis test showed that increasing the amount of modified nano ZnO could increase the glass transition temperature, and the maximum value was observed in 5 wt.% modified nano ZnO (69.7℃).

中文翻译：

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环保蓖麻油基紫外线固化氨基甲酸酯丙烯酸酯氧化锌纳米复合材料：合成和粘弹性行为

对环境问题的关注和维护它的重要性，使得研究人员在这方面更加关注。近年来，聚合物和树脂的产量有所增加，并且由于其长期降解而受到环境污染的影响。解决这个问题的一个合适的方法是合成可降解且环保的聚合物和树脂。在聚合物和树脂的合成中使用天然材料可以帮助它们环保。本研究的目的是利用自然资源合成聚氨酯丙烯酸酯树脂。为此，用蓖麻油合成了氨基甲酸酯丙烯酸酯预聚物。然后，使用具有 1、3 和 5 重量％氨基甲酸酯丙烯酸酯氧化锌纳米复合材料的改性氧化锌纳米颗粒制备。在辐射系统中使用蓖麻油作为可降解部分和缺乏有机溶剂导致产生了一种环保树脂。随后，评估了制备的纳米复合材料的粘弹性行为。光谱结果证实了合成的树脂结构。纳米复合材料的形态证实了 3 wt.% 样品中的适当粒度分布。动态力学热分析测试结果表明，增加改性纳米ZnO的用量可以提高玻璃化转变温度，在5wt.%的改性纳米ZnO（69.7℃）处观察到最大值。光谱结果证实了合成的树脂结构。纳米复合材料的形态证实了 3 wt.% 样品中的适当粒度分布。动态力学热分析测试结果表明，增加改性纳米ZnO的用量可以提高玻璃化转变温度，在5wt.%的改性纳米ZnO（69.7℃）处观察到最大值。光谱结果证实了合成的树脂结构。纳米复合材料的形态证实了 3 wt.% 样品中的适当粒度分布。动态力学热分析测试结果表明，增加改性纳米ZnO的用量可以提高玻璃化转变温度，在5wt.%的改性纳米ZnO（69.7℃）处观察到最大值。