The Polymerization of Vinyl Alcohol

乙烯醇的聚合

• 批准号: 9634528
• 负责人: Bruce Novak
• 金额: $ 33万
• 依托单位: University of Massachusetts Amherst
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-07-15 至 1999-08-05
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9634528&HistoricalAwards=false
• 关键词: Polymerization; Vinyl; Alcohol

9634528 Novak This grant is directed torward finding more direct methods of synthesizing useful polymers from inexpensive, new monomers. Specifically, the PI will focus on the synthesis of poly(vinyl alcohol) (PVOH), PVOH derivatives, and poly(vinyl amine) (PVAm) derivatives from enols and enamines, respectively. One goal of this work is the conversion of acetaldehyde to PVOH, which de facto, is the synthesis of PVOH from ethylene and oxygen. The synthetic approach involves circumventing inherent thermodynamic limitations by approaching conundrums from a kinetic perspective. From this vantage point, many thermodynamic problems can be transformed into competitive rate problems, and hence, remedied through chemistry (e.g., catalysis, conditions, etc.). In the context of this proposal, enols (e.g., vinyl alcohol, and its substituted derivatives) will be rapidly generated under meta-stable conditions and polymerized at a rate faster than they can tautomerize to the more thermodynamically stable aldehyde. Alternative enols will also be generated by the catalytic isomerization of allyl alcohol derivatives to the corresponding enols using homogeneous Rh(I), Ir(I), and Ru(II) catalysts. %%% Synthesis of important polymers from common and inexpensive sources, in particular on synthesis of water-soluble polymers used in applications ranging from pharmaceuticals to low VOC paints. ***

9634528诺瓦克（Novak）这笔赠款是指导的，找到了更直接的方法来合成廉价，新单体的有用聚合物。 具体而言，PI分别将专注于聚（乙烯基醇）（乙烯基醇），PVOH衍生物和聚（乙烯基胺）（PVAM）（PVAM）衍生物的合成。 这项工作的一个目标是将乙醛转化为PVOH（事实上）是从乙烯和氧气中合成PVOH。 合成方法涉及从动力学的角度接近难题来规避固有的热力学限制。 从这个有利的角度来看，许多热力学问题可以转化为竞争率问题，因此，通过化学（例如催化，状况等）进行了纠正。 在该提案的背景下，烯醇（例如乙烯基醇及其取代的衍生物）将在元稳定条件下迅速产生，并以比激进动力学稳定的醛更高的速率依赖速率的速度生成。 也将使用均匀的RH（I），IR（I）和RU（II）催化剂将烯醇醇衍生物催化异构化的催化异构化也将产生替代烯醇。 来自常见和廉价来源的重要聚合物的合成，尤其是关于用于从药物到低VOC涂料的应用中使用的水溶性聚合物的合成。 ***