U.S.-France Cooperative Research: Nitroxide Assisted Living Free-Radical Polymerization of Block Copolymers in Supercritical Carbon Dioxide (CO2) and Characterization by Light Scat

这项为期三年的美法合作研究奖的获得者是北卡罗来纳大学国家科学基金会环境责任溶剂和工艺科学技术中心的约瑟夫·m·德西蒙（Joseph M. DeSimone）和法国蒙彼利埃国立化学高等学院的帕特里克·拉克鲁瓦-德马兹（Patrick lacrooux - desmazes）。该项目涉及使用氮氧化物合成新型氟化嵌段共聚物，在超临界二氧化碳溶液中对其进行表征，随后用于苯乙烯、甲基丙烯酸酯、丙烯酸酯和共聚物的分散聚合。美国研究者为这次合作带来了使用超临界二氧化碳作为聚合溶剂的专业知识。他的团队将表征含氟共聚物的溶液性质；进行静态光散射研究。这与法国在合成共聚物方面的专长相辅相成。法国实验室将在使用氮氧化物的基础上通过活性自由基聚合工艺制造共聚物。氟化嵌段共聚物是一类重要的工业聚合物，通常不溶于传统的有机和卤化溶剂。拟议的合作将促进对氟化嵌段共聚物特性的了解，以及使用超临界二氧化碳作为无害环境的生产方法。该奖项代表了美国方面向美国国家科学基金会和法国国家科学研究中心（CNRS）提出的联合提案。美国国家科学基金会将支付美国研究小组成员的访问费用。法国科学研究中心将支持法国研究人员访问美国。

0089956DeSimoneThis three-year award for U.S.-France cooperative research involves Joseph M. DeSimone of the NSF Science and Technology Center for Environmentally Responsible Solvents and Processes at the University of North Carolina and Patrick Lacroix-Desmazes of the Ecole Nationale Superieure de Chimie, Montpellier, France. The project addresses the synthesis of novel fluorinated block copolymers using nitroxides, their characterization in supercritical carbon dioxide solution and subsequent use in the dispersion polymerization of styrene, methacryaltes, acrylates and copolymers. The US investigator brings to this collaboration expertise in using supercritical carbon dioxide as a polymerization solvent. His group will characterize the solution properties of the fluorinated co-polymers; and perform static light scattering studies. This is complemented by French expertise in the synthesis of copolymers. The French laboratory will make the copolymers by a living free-radical polymerization process based on the use of nitroxides. Fluorinated block copolymers, a class of industrially important polymers, are typically insoluble in traditional organic and halogenated solvents. The proposed collaboration will advance understanding of characterization of fluorinated block copolymers and the use of super critical carbon dioxide as an environmentally benign method for producing them.This award represents the US side of a joint proposal to the NSF and the French National Center for Scientific Research (CNRS). NSF will cover the expenses of visits of members of the US research group. The CNRS will support the visits of French researchers to the United States.