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line-height: 26px;"> 在涂料生产过程当中，由于需要将亲水的极性物质颜料分散到属于疏水的非极性有机基料中，所以生产者都会添加适量的<strong>偶联剂</strong></span><span style="font-family: Arial, Helvetica, sans-serif; line-height: 26px;">这种材料，从而增加无机物与有机高分子之间的亲合性。</span><br style="font-family: Arial, Helvetica, sans-serif; line-height: 26px;" /> <span style="font-family: Arial, Helvetica, sans-serif; line-height: 26px;"> 当这些亲水性的颜料经偶联剂处理后，会使它们由亲水性变为疏水性，从而促进无机物和有机物之间的界面结合。虽然偶联剂与表面活性剂在分子的结构和应用方面有些相似，但是也存在一定的差别。</span><br style="font-family: Arial, Helvetica, sans-serif; line-height: 26px;" /> <span style="font-family: Arial, Helvetica, sans-serif; line-height: 26px;"> 表面活性剂是通过分子中亲水基团定向吸附在无机颜料表面形成的单分子层，从而提高颜料在基料中的分散性和润湿性，这是一种物理吸附现象，因此会造成部分颜料有迁移现象从而对制品的光泽产生影响。而偶联剂是通过化学反应来与无机颜料表面进行结合并和高分子基料进行交联，把这两种不同性质的物质结合起来，从而起到桥梁的作用。因此从结合强度、提高颜料在基料中的分散程序以及降低界面自由能幅度等方面来看，偶联剂都远远胜过表面活性剂。</span></p><div class="clear"></div> </div> <div class="blank30"></div> <div class="blank30"></div> <!--自动调用自定义字段--> <div class="blank20"></div> <div class="blank30"></div> <!-- 投票 --> <script src="/index.php?case=vote&act=view&aid=1436"></script> <!-- 自定义表单开始 --> <!-- 自定义表单结束 --> <script language="JavaScript"> function shutwin(){ window.close(); 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