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Lime repellent polyethylene additives

机译：防石灰聚乙烯添加剂

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The precipitation of calcium carbonate from hard water, commonly known as calcification or scaling, is a widespread nuisance. To avoid scaling, a physical or chemical pretreatment of water is often employed, such as ion exchange, addition of complexing agents, or the use of magnetic and electric fields. Our approach is to construct surfaces to which calcium carbonate crystals do not adhere. Here, we show that by the use of particular copolymer additives, polyethylene can be made lime repellent. The copolymers have the formula: polyethylene-block-poly(ethylene glycol) and are compounded into the polyethylene. Twelve such additives were investigated and three displayed anticalcification activity. The effective copolymers were investigated by mass spectrometry. Infrared spectroscopy of copolymer/polyethylene blends revealed that the concentration of the additive in the matrix correlates to a specific absorption band. Stability tests against hot water showed that the anticalcification activity was maintained over the timeframe investigated.
机译：硬水中碳酸钙的沉淀（通常称为钙化或结垢）是一种普遍的滋扰。为了避免结垢，经常使用水的物理或化学预处理，例如离子交换，添加络合剂或使用磁场和电场。我们的方法是构造碳酸钙晶体不粘附的表面。在这里，我们表明通过使用特定的共聚物添加剂，可以将聚乙烯制成防石灰剂。该共聚物具有下式：聚乙烯-嵌段-聚（乙二醇），并混入聚乙烯中。研究了十二种此类添加剂，其中三种具有抗钙化活性。通过质谱研究了有效的共聚物。共聚物/聚乙烯共混物的红外光谱表明，基质中添加剂的浓度与特定的吸收带相关。对热水的稳定性测试表明，在所研究的时间范围内，抗钙化活性得以保持。

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