Water Sensitivity of Latex-Based Films
Water Sensitivity of Latex-Based Films
复制标题
乳胶基薄膜的水敏感性
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
R. Gilbert
中科院分区：
文献类型：
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作者：
L. Butler;C. Fellows;R. Gilbert
制备了一系列以甲基丙烯酸甲酯（MMA）和丙烯酸丁酯（BA）为基料、添加丙烯酸（AA）和甲基丙烯酸（MAA）电空间稳定剂的聚合物乳液，并通过浸泡试验研究了这些乳液形成的膜的水敏性。考虑了许多变量，包括亲水性单体的浓度，自由基抑制剂的存在/不存在，以及使用各种追踪系统来去除残留单体。水敏感性没有增加成比例的进料中的亲水性单体的量，并没有直接相关的量或分子量的未接枝的支链或接枝的支链的长度。提出了一个模型，表明电空间稳定剂在降低水阻中的主要作用与其防止聚合物颗粒的相干性以形成连续膜的能力有关。这种能力应该与稳定油包水乳液的能力差有关。
A series of polymer latices based on methyl methacrylate (MMA) and butyl acrylate (BA) incorporating electrosteric stabilizers containing acrylic acid (AA) and methacrylic acid (MAA) was prepared, and the water sensitivity of films formed from these latices was investigated by immersion tests. A number of variables were considered, including the concentration of the hydrophilic monomer, the presence/absence of a free-radical inhibitor, and the use of various chaser systems to remove residual monomer. Water sensitivity did not increase proportionally to the amount of hydrophilic monomer in the feed and was not directly related to the amount or molecular weight of ungrafted polyelectrolyte or to the length of the grafted polyelectrolyte chains. A model is advanced suggesting that the primary role of the electrosteric stabilizer in reducing water resistance is connected with its ability to prevent coherence of the polymer particles to form a continuous film. This ability should be related to a poor capacity to stabilize water-in-oil emulsions.