U.S.-Romania Materials Research on Random and Block Ionomers: Morphology, Dynamics, and Self-Assembling

美国-罗马尼亚无规和嵌段离聚物材料研究：形态、动力学和自组装

• 批准号: 0002472
• 负责人: Shulamith Schlick
• 金额: $ 5.38万
• 依托单位: University of Detroit Mercy
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-10-01 至 2005-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0002472&HistoricalAwards=false
• 关键词: U.S.; Romania; Materials; Research; Random

INT 00002472Schlick, ShulamithThis U.S.-Romanian research project involving Shulamith Schlick at the University of Detroit, Ileana Dragutan of the Center for Organic Chemistry, Romanian Academy of Sciences, and Bogdan Simionescu of Asachi Technical University features examination of ionomer systems. This U.S.-Romania team benefits from complementary expertise in ESR spectroscopy (Detroit), Spin probes (Bucharest) and block copolymer synthesis (Yassy). Together, the researchers will seek an explanation for observed yet puzzling characteristics related to macromolecular organization in the membrane material Nafion and the organization in solvents of various polarities of ionic block polymers with strongly hydorphilic segments and strongly hydrophobic segments. To accomplish this, the researchers plan to: 1) use perfluorinated nitroxide spin probes prepared in Bucharest to investigate aggregation of perfluorinated ionomers (Nafion) and 2) apply the methodology of ESR (electron-spin resonance) spectroscopy based on paramagnetic probes and ESR imaging to study self-assembly in and cation binding of block copolymers containing polydimethylsiloxane (PDMS) segments. They'll also study polydimethylsiloxane-poly (methyacrylic acid) (PSMS-PMAA) blocks in the presence of toluene as the selective solvent for the PDMS block and water as the selective solvent for the PMAA block. If successful, results should improve our knowledge of the microstructure of ionomers and provide new quantitative information about the dynamics of the different microstructural regions. Findings are expected to have potential industrial applications in areas such as fuel cells and biomemetics. This international project in polymer research fulfills the program objective of advancing scientific knowledge by enabling experts in the Untied States and Central Europe to combine complementary talents and share research resources in areas of strong mutual interest and competence.

INT 00002472 Schlick，ShulamithThis美国-罗马尼亚的研究项目涉及底特律大学的Shulamith Schlick、罗马尼亚科学院有机化学中心的Ileana Dragutan和Asachi技术大学的Bogdan Simionescu，他们对离聚物系统进行了研究。这个美国-罗马尼亚团队受益于ESR光谱（底特律）、自旋探针（布加勒斯特）和嵌段共聚物合成（Yassy）方面的互补专业知识。 研究人员将共同寻求解释与膜材料Nafion中的大分子组织有关的观察到的但令人困惑的特征，以及具有强亲水性片段和强疏水性片段的离子嵌段聚合物的各种极性溶剂中的组织。为了实现这一目标，研究人员计划：1）使用在布加勒斯特制备的全氟氮氧化物自旋探针来研究全氟离聚物（Nafion）的聚集，2）应用基于顺磁探针和ESR成像的ESR（电子自旋共振）光谱方法来研究含有聚二甲基硅氧烷（PDMS）片段的嵌段共聚物的自组装和阳离子结合。 他们还将在甲苯作为PDMS嵌段的选择性溶剂和水作为PMAA嵌段的选择性溶剂的情况下研究聚二甲基硅氧烷-聚（甲基丙烯酸）（PSMS-PMAA）嵌段。 如果成功的话，结果应该提高我们的知识的微观结构的离聚物，并提供新的定量信息的动态不同的微观结构区域。 研究结果有望在燃料电池和生物化学等领域具有潜在的工业应用。这个聚合物研究的国际项目通过使美国和中欧的专家能够联合收割机互补人才并在具有强烈共同兴趣和能力的领域共享研究资源，实现了推进科学知识的计划目标。