Self-organization of polyaspartate derivatives and their application to polymer colloid preparation

聚天冬氨酸衍生物的自组织及其在聚合物胶体制备中的应用

• 批准号: 12450318
• 负责人: YOSHIZAWA Hidekazu
• 金额: $ 2.62万
• 依托单位: OKAYAMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450318/
• 关键词: Polymer Emulsifier; Self-organization; Polymer Microsphere; Micelle; Polyaspartate; Colloid; Emulsion Polymerization; ζ-potential; ポリアスバラギン酸; 表面張力; 蛍光分光法; 動的光散乱

Water-soluble and biodegradable polyaspartate derivatives were synthesized. Colloidal properties of their aqueous solution such as micelle formation were studied by using surface tension measurement, fluorescence probe technique, dynamic light scattering and so on. As a result, it was clarifies that their substances associated to form both inter- and intra-molecular aggregates which diameter ranged from several nm to several tens nm.Furthermore, we adopted the synthesized polyaspartate derivatives as a surfactant and emulsion polymerization of styrene was carried out. Spherical polystyrene microspheres were successfully prepared. From the evidence of surfactant-concentration dependency of microsphere diameter, it was found that emulsion polymerization proceeded following traditional Smith-Ewart mechanism. Dispersion property of polystyrene latex prepared in this study was discussed from the point of view of ζ-potential.

合成了水溶性且可生物降解的聚天冬氨酸衍生物。利用表面张力测量、荧光探针技术、动态光散射等研究了其水溶液的胶束形成等胶体性质。结果表明，它们的物质缔合形成分子间和分子内聚集体，其直径从几纳米到几十纳米。此外，我们采用合成的聚天冬氨酸衍生物作为表面活性剂，对苯乙烯进行乳液聚合。成功制备出球形聚苯乙烯微球。从微球直径与表面活性剂浓度依赖性的证据来看，乳液聚合按照传统的Smith-Ewart机理进行。本研究制备的聚苯乙烯乳胶的分散性能从 z 电位的角度进行了讨论。