Abstract Herein, poly(methyl methacrylate) (PMMA) microspheres with different size and distribution were synthesized via one-step dispersion polymerization, using methyl methacrylate (MMA), polyvinylpyrrolidone (PVP), and sodium styrene sulfonate (NaSS) as monomer, stabilizer, and co-monomer, respectively. The influence of MMA, PVP, and NaSS concentrations on the particle size and distribution of PMMA was investigated. The results showed that an increase of NaSS or PVP concentrations; the size of PMMA microspheres tended to decrease while increasing the MMA concentration led to large particle size and wide distribution. In order to evaluate matting effect of PMMA microspheres, artificial leather was used as the base, which was coated by waterborne polyurethane (WPU) mixture with PMMA microspheres. The matting effect was significantly determined by the size scale of PMMA microspheres. With increasing the particle size of microspheres, the gloss of coatings surface gradually decreased. Further mechanism study indicated that PMMA microspheres mounted on the surface of WPU coatings thus making the coating surface rough and bumpy was the reason for obtaining coatings with matting effect. Rough surface leads incident light to scatter rather than reflecting, which was the nature for matting effect of present PMMA microspheres.

中文翻译：

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分散聚合制备具有消光特性的聚甲基丙烯酸甲酯微球

摘要 本文以甲基丙烯酸甲酯 (MMA)、聚乙烯吡咯烷酮 (PVP) 和苯乙烯磺酸钠 (NaSS) 为单体、稳定剂、和共聚单体。研究了 MMA、PVP 和 NaSS 浓度对 PMMA 粒径和分布的影响。结果表明，NaSS或PVP浓度增加；PMMA微球的尺寸趋于减小，而增加MMA浓度导致粒径大且分布广。为评价PMMA微球的消光效果，以人造革为基材，采用水性聚氨酯（WPU）与PMMA微球的混合物包覆。PMMA 微球的尺寸大小显着决定了消光效果。随着微球粒径的增大，涂层表面光泽度逐渐降低。进一步的机理研究表明，PMMA 微球安装在 WPU 涂层表面，使涂层表面粗糙和凹凸不平是获得具有消光效果的涂层的原因。粗糙的表面导致入射光散射而不是反射，这是目前 PMMA 微球消光效果的本质。进一步的机理研究表明，PMMA 微球安装在 WPU 涂层表面，使涂层表面粗糙和凹凸不平是获得具有消光效果的涂层的原因。粗糙的表面导致入射光散射而不是反射，这是目前 PMMA 微球消光效果的本质。进一步的机理研究表明，PMMA 微球安装在 WPU 涂层表面，使涂层表面粗糙和凹凸不平是获得具有消光效果的涂层的原因。粗糙的表面导致入射光散射而不是反射，这是目前 PMMA 微球消光效果的本质。