Production of Monodisperse Anomalous Polymer Microspheres Having High Light Scattering Ability

本课题的目的是制备具有高光散射能力的单分散反常聚合物微球，并取得了如下成果：1。对无皂乳液共聚法制备的苯乙烯-丙烯酸丁酯-甲基丙烯酸三元共聚微球，提出了两步碱/酸处理法，制备了内部有许多空隙的异常聚合物微球.采用我们提出的分步异凝聚法制备了表面凹凸不平的异常聚合物微球。例如，将Tg为约100 ℃的0.2 μ m大小的阳离子聚合物颗粒凝聚到Tg为约70 ℃的0.8 μ m大小的阴离子聚合物颗粒上。通过热处理可以控制异质凝聚颗粒的表面不均匀性.在聚苯乙烯粒子存在下，通过丙烯酸丁酯的种子乳液聚合制备了"高尔夫球状"聚合物粒子.用甲苯在反射下萃取处理交联的单分散聚合物颗粒，制备具有空隙的纳米尺寸的聚合物颗粒，所述交联的单分散聚合物颗粒是通过我们制备的苯乙烯和二乙烯基苯的单体溶胀颗粒的种子共聚合制备的，所述单体溶胀颗粒是通过动态溶胀法制备的，我们证实了上述制备的颗粒的一部分具有高光散射能力。

The purpose of this project is to produce some monodisperse anomalous polymer microspheres having high light scattering ability and we have succeeded it as follows:1. Anomalous polymer microspheres having many voids therein were produced by two steps alkali/acid treatment, which we proposed, of styrene-butyl acrylate-methacrylic acid terpolymer microspheres prepared by emulsifier-free emulsion terpolymerization.2. Anomalous polymer microspheres having uneven surfaces were produced by stepwise heterocoagulation method, which we proposed. For example, 0.2 um-sized cationic polymer particles having Tg of about 100ﾟC were coagulated onto 0.8 mu-sized anionic polymer particles having Tg of about 70ﾟC. The surface unevenness of the heterocoagulated particles could be controlled by heat treatment.3. "Golf ball-like" polymer particles were produced by seeded emulsion polymerization of butyl acrylate in the presence of polystyrene particles.4. Micron-sized polymer particles having voids therein were produced by extraction treatment of crosslinked monodisperse polymer particles with toluene under reflex, which were produced by seeded copolymerization for monomer-swollen particles of polystyrene with styrene and divinyl benzene prepared by the dynamic swelling method, which we produced.We have confirmed that a part of the above produced particle had a high light scattering ability.