Abstract Pressure sensitive adhesive (PSA) films were produced by in situ seeded semi-batch emulsion polymerization of butyl acrylate (BA) and methyl methacrylate (MMA) in the presence of varying amounts of lignin. Two types of Kraft lignin, water-soluble and non-water soluble, were used in this study. Lignin was modified using acrylation (methacryloyl chloride), maleation (maleic anhydride) and acetylation (acetyl bromide and acetic acid) to promote its miscibility with the BA and MMA monomers and encourage its incorporation into the polymer matrix. For the case of the maleated lignin, maximum incorporation of 10 wt% was achieved whereas, for the acrylated lignin case, a maximum of 5 wt% was attained. Lignin was shown to decrease latex viscosity in all cases. At a lignin loading of 1 wt% (relative to the amount of monomer) a tack and shear strength of the PSA films increased significantly while the peel strength remained constant. Thus, maleated lignin was shown to be an effective, renewable modifier for emulsion-based PSA properties.

中文翻译：

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木质素在乳液型压敏胶中的应用

摘要 压敏粘合剂 (PSA) 薄膜是通过丙烯酸丁酯 (BA) 和甲基丙烯酸甲酯 (MMA) 在不同量木质素存在下的原位接种半间歇乳液聚合制备的。本研究中使用了两种类型的牛皮纸木质素，水溶性和非水溶性。木质素使用丙烯酸化（甲基丙烯酰氯）、马来化（马来酸酐）和乙酰化（乙酰溴和乙酸）进行改性，以促进其与 BA 和 MMA 单体的混溶并促进其结合到聚合物基质中。对于马来化木质素的情况，实现了 10wt% 的最大掺入，而对于丙烯酸化木质素的情况，实现了最大 5wt%。在所有情况下，木质素都显示出降低胶乳粘度。在1wt%（相对于单体的量）的木质素负载量下，PSA膜的粘性和剪切强度显着增加，而剥离强度保持恒定。因此，马来化木质素被证明是一种有效的、可再生的乳液型 PSA 改性剂。