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首页> 外文期刊>American journal of applied sciences >Adhesion and Hardness Evaluation of Modified Silicone-Dammar as Natural Coating Materials
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Adhesion and Hardness Evaluation of Modified Silicone-Dammar as Natural Coating Materials

机译：改性有机硅-达玛作为天然涂料的附着力和硬度评估

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Problem statement: Dammar is a natural resin that used anciently in varnish production. The use of dammar natural resin in coating is limited by undesirable properties for application in coating where it is considered very brittle. Due to dammar's brittle nature, an aged dammar coating can be easily scratched or abraded. Approach: Dammar natural resin could be modified into Silicone-Dammar by using a solvent in order to improve the coating's mechanical properties. The modified Silicone-Dammar (SD) was coated on aluminum q-panel and adhesion was evaluated using cross hatch test, impact test and pull off test, while the hardness of coating was investigated by nano-indentation test. Results: Results from cross hatch test, impact test and pull off test show that coating material with 15% wt. of dammar (SD15) was the optimum composition which exhibits good adhesion of modified Silicone-Dammar to the metal substrate. SD15 also could be considered as a soft and flexible polymer coating with hardness value of 1.624 GPa after undergoing the nano-indentation test. Conclusion: A modified Silicone-Dammar coating system with varied compositions of dammar has been prepared and adhesion and hardness have been evaluated. It is found that 15% wt. of dammar in the coating material (SD15) exhibits good adhesion to aluminum substrate and soft and flexible in nature.
机译：问题陈述：Dammar是一种古老的清漆生产中使用的天然树脂。达玛天然树脂在涂料中的使用受到在涂料中被认为很脆的不良性能的限制。由于dammar的脆性，老化的dammar涂层很容易划伤或磨损。方法：可以通过使用溶剂将Dammar天然树脂改性为Silicone-Dammar，以改善涂层的机械性能。将改性的有机硅Dammar（SD）涂在铝质q面板上，并使用划格法，冲击试验和拉拔试验评估粘附性，同时通过纳米压痕试验研究涂层的硬度。结果：划格法，冲击试验和拉断试验的结果表明，涂​​料的重量百分比为15％。 dammar（SD15）的最佳组合是表现出改性的硅氧烷-Dammar对金属基材的良好粘合性的最佳组成。经过纳米压痕测试后，SD15也可被视为具有1.624 GPa硬度值的柔软而柔软的聚合物涂层。结论：制备了具有不同组成的dammar的改性Silicone-Dammar涂料体系，并评估了附着力和硬度。发现15重量％。涂层材料（SD15）中的达玛蜡涂层对铝基材表现出良好的粘合性，并且本质上柔软而有弹性。

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