• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Effect of Degree of Branching on the Thermoresponsive Phase Transition Behaviors of Hyperbranched Multiarm Copolymers: Comparison of Systems with LCST Transition Based on Coil-to-Globule Transition or Hydrophilic—Hydrophobic Balance
【24h】

Effect of Degree of Branching on the Thermoresponsive Phase Transition Behaviors of Hyperbranched Multiarm Copolymers: Comparison of Systems with LCST Transition Based on Coil-to-Globule Transition or Hydrophilic—Hydrophobic Balance

机译：支化度对超支化多臂共聚物热响应相变行为的影响：基于线圈到球状转变或亲水-疏水平衡的LCST转变体系的比较

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

This work reports for the first time the influence of degree of branching (DB) on the thermoresponsive phase transition behaviors of hyperbranched multiarm copolymers. Two series of PEHO-star-PEOs (series A) and PEHO-star-PDMAEMAs (series B) with the hydrophobic DB-variable PEHO core and different kinds of linear arms (PEO arms or PDMAEMA arms) were synthesized. It was found these two series demonstrate thermoresponsive phase transitions with the lower critical solution temperature (LCST). The studies on the LCST transition mechanism indicate that series A belongs to the thermoresponsive polymer system with LCST transition based on hydrophilic—hydrophobic balance, while series B belongs to the thermoresponsive polymer system with LCST transition based on coil-to-globule transition. Correspondingly, there is a big difference in the DB dependence of LCST transition between series A and series B. For series A, the LCST phase transition is highly dependent on the DB of the PEHO core in copolymers. For series B, the LCST phase transition is independent of the DB but dependent on solution pH. Such results may extend the knowledge on the structure—activity relationship of thermoresponsive highly branched polymers.
机译：这项工作首次报道了支化度（DB）对超支化多臂共聚物热响应相变行为的影响。合成了两个系列的PEHO-star-PEO（A系列）和PEHO-star-PDMAEMA（B系列），它们具有疏水性DB变量PEHO核心和不同种类的线性臂（PEO臂或PDMAEMA臂）。发现这两个系列显示出具有较低临界溶液温度（LCST）的热响应相变。对LCST转变机理的研究表明，系列A属于具有基于亲水-疏水平衡的LCST转变的热敏聚合物体系，而系列B属于具有基于线圈到球状转变的LCST转变的热敏聚合物体系。相应地，系列A和系列B之间LCST过渡的DB依赖性存在很大差异。对于系列A，LCST相变高度依赖于共聚物中PEHO核的DB。对于系列B，LCST相变独立于DB，但取决于溶液的pH值。这样的结果可以扩展关于热响应性高支化聚合物的结构-活性关系的知识。

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