AMPHILIC HYPERBRANCHED LINEAR HYBRID STAR POLYMERS

两亲性超支化线性杂化星形聚合物

• 批准号: 7355191
• 负责人: Karen L. Wooley
• 金额: $ 0.09万
• 依托单位: WASHINGTON UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-02-01 至 2007-01-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7355191
• 关键词: AMPHILIC; HYPERBRANCHED; LINEAR; HYBRID; STAR

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Hyperbranched fluoropolymers bearing pentafluorophenyl chain end groups undergo nucleophilic aromatic substitution reactions with amino-terminated poly(ethylene oxide)s to produce hybrid hyperbranched-linear star polymers of amphiphilic character. These materials are important for their unimolecular micelle character and they also serve as precursors for the generation of minimally-adhesive films, coatings, and membranes that present nanoscopically-resolved surface topographies and morphologies. Mass spectrometry has been applied toward the characterization of the hyperbranched fluoropolymers, linear poly(ethylene oxide)s and it is expected to be quite valuable for the characterization of the star polymers, in particular, by allowing for determination of the number of star arms and the arm distribution. These data are difficult to determine by other means, for example, typical molecular weight analyses, because of the amphiphilic behavior and the globular s hap e.

这个子项目是利用由NIH/NCRR资助的中心拨款提供的资源的许多研究子项目之一。子项目和调查员(PI)可能从另一个NIH来源获得了主要资金，因此可能会出现在其他CRISE条目中。列出的机构是针对中心的，而不一定是针对调查员的机构。含五氟苯链端基的超支化含氟聚合物与端氨基的聚环氧乙烷S发生亲核芳香取代反应，合成了具有两亲性的杂化超支化线型星形聚合物。这些材料对于它们的单分子胶束特性很重要，它们也是产生低粘附性薄膜、涂层和薄膜的前体，这些薄膜和薄膜呈现纳米级分辨的表面形貌和形貌。质谱学已被应用于超支化含氟聚合物线型聚氧乙烷S的表征，有望对星形聚合物的表征，特别是通过测定星形臂的数目和臂分布而具有相当大的价值。这些数据很难通过其他方法来确定，例如典型的分子量分析，因为两亲性和球状的S基团。