Research Initiation Award Grant: Synthesize and Characterize of Disulfonated Poly(arylene ether sulfone-tetrachlorocyclotriphosphazene) Hybrid Copolymers

研究启动奖：二磺化聚（亚芳基醚砜-四氯环三磷腈）杂化共聚物的合成和表征

• 批准号: 1137573
• 负责人: Natalie Arnett
• 金额: $ 20万
• 依托单位: Fisk University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1137573&HistoricalAwards=false
• 关键词: Research; Initiation; Award; Grant; Synthesize

Fisk University's Research Initiation Award entitled - Synthesize and Characterize of Disulfonated Poly(arylene ether sulfone-tetrachlorocyclotriphosphazene) Hybrid Copolymers - has the goal to synthesize disulfonated poly(arylene ether sulfone tetrachlorocyclotriphosphazene) (PAES-TCCP) hybrid copolymers as proton exchange membranes (PEM) for fuel cells. Polymer membranes created to date are insufficiently proton conductive to be useful for fuel cells. The project will combine the unique properties of hexachlorocyclotriphosphazene (HCCP) monomer with disulfonated poly(arylene ether sulfone) (PAES) copolymer to prepare novel hybrid polymers with increased hydrophilicity, high proton conductivity, thermal stability, and mechanical properties. However, harsh post sulfonation reactions typically reported to modify HCCP preformed polymers led to both irreproducible and crosslinked products. To overcome these limitations, a two-step method for preparing disulfonated linear PAES-TCCP hybrid copolymers is proposed. In the first step, hybrid monomers based on hexachlorocyclotriphosphazene and biphenols monomers will be prepared; the phenolic endgroups of the bisphenol monomers will serve as the reactive site for polymerization to overcome the steric hindrance associated with the HCCP monomer, thus increasing polymer molecular weight. Secondly, linear PAES-TCCP hybrid copolymers will be synthesized by direct copolymerization of the hybrid monomers with disulfonated 4, 4'-dichlorodiphenylsulfone (SDCDPS) and unsulfonated 4, 4'-dichlorodiphenylsulfone (DCDPS) monomers. Retention of the chlorides on HCCP prior to polymerization will allow post-modifications to be carried out along the polymer backbone, providing further reactive sites to subsequently incorporate various functional groups. The expected products will have improved proton conductivity and controlled cross-linking.This project involves undergraduate students from under-represented backgrounds in state-of-the-art polymer research at Fisk University. Students participate in all major aspects of the research, increasing their interest in polymer chemistry through hands-on experiences. Undergraduate research by Fisk students further prepares them to obtain M.S. or PhD degrees for careers in the polymer-related fields.

菲斯克大学的研究启动奖题为“二磺化聚（亚芳基醚砜-四氯环三磷腈）杂化共聚物的合成和表征”，其目标是合成二磺化聚（亚芳基醚砜四氯环三磷腈）（PAES-TCCP）杂化共聚物作为质子交换膜（PEM）用于燃料电池。迄今为止制造的聚合物膜的质子传导性不足，无法用于燃料电池。该项目将结合六氯环三磷腈（HCCP）单体与二磺化聚（亚芳基醚砜）（PAES）共聚物的独特性能，制备具有更高亲水性、高质子传导性、热稳定性和机械性能的新型杂化聚合物。然而，据报道，苛刻的后磺化反应通常会改变 HCCP 预制聚合物，从而导致无法重现和交联的产品。为了克服这些限制，提出了一种制备二磺化线性 PAES-TCCP 杂化共聚物的两步法。第一步，制备基于六氯环三磷腈和联苯酚单体的杂化单体；双酚单体的酚端基将作为聚合的反应位点，以克服与HCCP单体相关的空间位阻，从而增加聚合物的分子量。其次，通过杂化单体与二磺化4, 4'-二氯二苯砜（SDCDPS）和未磺化4, 4'-二氯二苯砜（DCDPS）单体的直接共聚合成线性PAES-TCCP杂化共聚物。在聚合之前将氯化物保留在 HCCP 上将允许沿着聚合物主链进行后改性，从而提供进一步的反应位点以随后掺入各种官能团。预期产品将具有改进的质子传导性和受控交联。该项目涉及来自菲斯克大学最先进聚合物研究背景的本科生。 学生参与研究的所有主要方面，通过实践经验增加他们对高分子化学的兴趣。菲斯克学生的本科研究进一步为他们获得硕士学位做好了准备。或聚合物相关领域职业的博士学位。