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首页> 外文期刊>Journal of Applied Polymer Science >The crosslinking directing dynamic behavior of polymer latex under the investigation toward waterborne damping coatings
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The crosslinking directing dynamic behavior of polymer latex under the investigation toward waterborne damping coatings

机译：水性阻尼涂层调查下聚合物乳胶的交联引导动态行为

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摘要

Latex polymers with precisely designed dynamic mechanical behavior are the key for waterborne damping coatings, which are widely desired in noise and vibration reduction with additional environmental benefits. In this work, we synthesized series of polymer latexes with various crosslinking agents (CA) and network distributions through the control on emulsion polymerization processes. We have revealed that the variation on crosslinking can significantly direct the latex behavior under dynamic conditions as well as its films. The variables involve the CA composition, the functionality, the crosslinking manner, the hydrophilic-hydrophobic feature as well as the feeding method. Although all the latex films showed the damping peaks locating in the range from -10 to 70 degrees C, their damping behaviors were quite different. Suggested by the empirical parameters of LA and TA, the product from sequential monomer feeding method tended to give good extensional damping performance. Especially when the crosslinking of diacetone acrylamide (DAAM)/adipic dihydrazide was applied, there was a linear increase on LA with the increasing dosage of DAAM from 0 to 10 mmol in the final monomer addition batch. Meanwhile, good constrained layer damping is expected on the products from the power monomer feeding method with the maximum CA dosage shown below 7.5 mmol. The best TA was achieved when the CA of divinylbenzene was used in the dosage of 5 mmol. These results would be valuable to be referenced in the engineering on organic damping materials toward modern industrial and vehicles applications.
机译：具有精确设计的动态力学性能的乳胶聚合物是水性阻尼涂料的关键，水性阻尼涂料在降噪和减振方面有着广泛的需求，并具有额外的环境效益。在这项工作中，我们通过控制乳液聚合过程，合成了一系列具有各种交联剂（CA）和网络分布的聚合物乳液。我们已经发现，交联度的变化可以显著地指导动态条件下的乳胶及其膜的行为。这些变量涉及CA的组成、功能性、交联方式、亲水-疏水特性以及加料方法。虽然所有乳胶膜的阻尼峰都位于-10到70摄氏度之间，但它们的阻尼行为却截然不同。根据LA和TA的经验参数，顺序单体加料法所得产物具有良好的拉伸阻尼性能。特别是当使用二丙酮丙烯酰胺（DAAM）/己二酸二酰肼交联时，在最终单体添加批次中，随着DAAM用量从0增加到10 mmol，LA呈线性增加。同时，在最大CA用量低于7.5 mmol的情况下，粉末单体进料法的产品有望获得良好的约束层阻尼。当二乙烯基苯的CA用量为5mmol时，TA达到最佳。这些结果对有机阻尼材料在现代工业和汽车中的应用具有参考价值。

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