Abstract Alkali-soluble resins (ASRs) are a type of polymeric surfactants that can beneficially improve the properties of waterborne dispersed polymers, thus attracting great attention from the industrial point of view. When used as protective colloids in emulsion polymerization systems, grafting reactions between the surfactants molecules and the particles may occur. These grafting reactions can prevent the release to the environment of the surfactant when the dispersion is employed in formulations for coating. Two different mechanisms lie behind grafting reactions, i.e. hydrogen abstraction by reactive radicals from acrylic moieties, followed by propagation of the newly-formed active center, and the incorporation through polymerizable double bonds present on the backbone of the ASR. In this work, quantification of grafting using three different model ASRs revealed appreciable amounts of linking in different experimental conditions. Moreover, the discrimination of the two different contributions to grafting indicated that incorporation of reactive double bonds is the predominant pathway leading to extended linking. These findings may help the design of the new generation of leaching-free waterborne coatings with reduced environmental impact.

中文翻译：

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在用碱溶性树脂稳定的聚合物分散体中接枝：迈向无浸出水性涂料的生产

摘要 碱溶性树脂（ASRs）是一类能有效改善水性分散聚合物性能的高分子表面活性剂，因此在工业上备受关注。当用作乳液聚合体系中的保护胶体时，表面活性剂分子和颗粒之间可能发生接枝反应。当分散体用于涂料配方中时，这些接枝反应可以防止表面活性剂释放到环境中。接枝反应背后有两种不同的机制，即通过丙烯酸部分的反应性自由基夺取氢，随后是新形成的活性中心的传播，以及通过存在于 ASR 主链上的可聚合双键结合。在这项工作中，使用三种不同模型 ASR 对嫁接进行的量化揭示了不同实验条件下可观数量的连接。此外，对接枝的两种不同贡献的区分表明，反应性双键的掺入是导致扩展连接的主要途径。这些发现可能有助于设计新一代无浸出水性涂料，减少对环境的影响。