• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Surface and Colloid Science; 200309; Brazil >Thermodynamic properties and interfacial behaviour of uncharged polymers and binary polymer mixtures
【24h】

Thermodynamic properties and interfacial behaviour of uncharged polymers and binary polymer mixtures

机译：不带电聚合物和二元聚合物混合物的热力学性质和界面行为

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The thermodynamic properties of uncharged polymers in aqueous solution and the interfacial behaviour of single polymer and binary polymer mixtures, respectively, on colloidal dispersions of negatively charged polystyrene latex were studied. The water activities in binary and ternary solutions of chemically different polymers were determined by a gel-deswelling method and the relevant solvent-segment and segment-segment pair interaction parameters were calculated. In aqueous dispersions of polystyrene latex, with and without adsorbed polymer, respectively, the osmotic pressures were directly measured by a block osmometer and the corresponding solvent activities were estimated. Independent adsorption isotherms were deter- mined for each polymer, both individually and under simultaneous, competitive adsorption conditions. As a measure of the preferential affinity for particle surfaces of chemically different macromolecules in simultaneous competitive adsorption, preferential adsorption parameters for the polymers in pairs were used. The thermodynamic characteristics proved to be relevant indicators for the interfacial behaviour of the polymers. Correlation was found between the thermodynamic activity and the affinity for polystyrene surfaces of the polymeric adsorbates.
机译：研究了带电聚合物在水溶液中的热力学性质以及单一聚合物和二元混合物在带负电荷的聚苯乙烯胶乳胶体分散体上的界面行为。通过凝胶溶胀法确定化学上不同的聚合物的二元和三元溶液中的水活度，并计算相关的溶剂-链段和链段-链段对的相互作用参数。在分别具有和不具有吸附聚合物的聚苯乙烯胶乳的水性分散体中，通过块渗透仪直接测量渗透压，并估计相应的溶剂活性。分别在竞争性吸附条件下，分别测定每种聚合物的独立吸附等温线。作为在同时竞争性吸附中化学上不同的大分子对颗粒表面的优先亲和力的量度，使用了成对聚合物的优先吸附参数。热力学特性被证明是聚合物界面行为的相关指标。发现热力学活性与聚合物吸附物对聚苯乙烯表面的亲和力之间存在相关性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号