聚醋酸乙烯酯白乳胶的合成工艺.pdf

目 录 前 言1 1. 实验方法2 1.1 仪器与试剂2 1.1.1 仪器 2 1.1.2 试剂 2 1.2 实验基本配方2 1.3 均聚乳液的制备工艺及操作方法2 1.4 聚醋酸乙烯酯乳液的共聚改性研究3 1.5 性能测试3 1.5.1 固含量测试3 1.5.2 粘度测试 3 1.5.3 聚合稳定性3 1.5.4 稳定性 3 1.5.5 强度测试4 1.5.6 耐水性测试 4 2. 反应条件对聚合反应的影响4 2.1 乳化剂对乳液聚合的影响4 2.2 引发剂用量对乳液性能的影响5 2.3 温度对聚合过程的影响6 2.4 反应时间的影响6 3.聚醋酸乙烯酯乳液的性能研究 7 4. 结 论9 参考文献 10 摘 要 聚醋酸乙烯酯又称为白乳胶，在日常生活中应用广泛，但由于自身的固有缺 点，使其应用受到限制。水溶性聚醋酸乙烯酯由醋酸乙烯酸酯类单体共聚而成的， 具有无毒无味，不燃不爆，无污染，可以根据不同用途生产具有不同使用性能的 白乳胶等优点。本文研制出一种粘接强度高、耐水性良好的环保水性胶粘剂，论 述了以醋酸乙烯酯为单体、过硫酸铵为引发剂、合成环保型水溶性白乳胶的过程。 通过实验表明，制造粘结性能好水溶性好的白乳胶受实验中的引发剂的用量、反 应温度、反应时间、酸碱度及单体配比影响，且得出一个较好的制备条件：温度 70±2℃；引发剂4.7% ；最佳时间 50~70min 。此时产品基本符合应用的要求，产 品的颜色成白色，粘稠液体。 关键词：聚醋酸乙烯酯；乳液聚合；环保 1 Abstract Polyvinyl acetate latex, also known as white, in their daily life widespread use, but because of its own inherent weaknesses, its application is restricted. Water-soluble polyvinyl acetate from vinyl ester monomers from the copolymer is non-toxic and tasteless, non-combustion, pollution-free, According to different uses can be produced with different properties of the use of the advantages of white latex. In this paper, the development of a high bond strength, water resistance of good environmental water- based adhesive discussed that the vinyl acetate monomers, persulfate as the initiator, environmental synthesis of water-soluble white emulsion process. The experiment indicates that the manufacturing capacity of water-soluble adhesive white latex good experiment by the amount of initiator, the reaction temperature, reaction time, pH and monomer ratio, and a better preparation conditions : temperature 70 ± 2 ℃; initiator 4.7%; the best time to 50 ~ 70 min. At