RUI: Thermal and Opto-rheological Studies of Poly(p-phenylene vinylene) (PPV) and PPV Derivatives

RUI：聚对亚苯基亚乙烯基 (PPV) 和 PPV 衍生物的热和光流变研究

• 批准号: 0075820
• 负责人: Georgia Arbuckle-Keil
• 金额: $ 27.5万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0075820&HistoricalAwards=false
• 关键词: RUI; Thermal; Opto; rheological; Studies

Poly(p-phenylene vinylene)(PPV) and PPV derivatives are of interest for their potential in a variety of electronic and optical device applications. Because the final PPV polymer is highly conjugated and insoluble, the preferred synthetic method follows a precursor polymer route. The routes are referred to as: sulfonium precursor route (SPR), xanthate precursor route (XPR) and chlorine precursor route (CPR). In this project, PPV and PPV derivatives will be synthesized via each of these routes depending on the desired product. PPV will be synthesized from the xanthate precursor which results in a more amorphous polymer. The thermal elimination reaction mechanism and the kinetics of the reaction will be analyzed. This will provide the half-life (shelf-life) of the precursor which is important for commercial application of the polymer. A full understanding of the thermal elimination reaction is important because the conditions of the thermal elimination reaction influence the properties of the final product. Other PPV derivatives that will be synthesized include, for example: poly(2,5-dimethoxy-p-phenylene vinylene)(DM-PPV); poly(phenoxyphenylene vinylene)(PO-PPV) and poly(2,3 diphenyl phenylene vinylene)(DP-PPV). Their thermal properties will be analyzed as discussed above for the xanthate precursor. In addition, the opto-rheological technique that will be employed is referred to as dynamic infrared linear dichroism (DIRLD) and has only recently been applied to the analysis of electroactive polymers. This study will relate the molecular motions (vibrational modes in the infrared region) to the bulk macroscopic properties observed by dynamic mechanical analysis (DMA).%%%Students will be actively engaged in materials research from the synthesis of the polymer precursor through to characterization by thermal analysis and DIRLD. Undergraduate students will work with a graduate student and the PI. Results will be discussed at weekly group meetings where ideas can be exchanged and questions answered. The research will be formally presented at the local, regional and national levels with publications submitted to referred journals for dissemination to the materials science community.

聚苯乙烯（PPV）及其衍生物因其在各种电子和光学器件中的应用潜力而引起人们的兴趣。由于最终的PPV聚合物具有高共轭性和不溶性，因此优选的合成方法遵循前驱体聚合物路线。这些途径分别是：磺胺前体途径（SPR）、黄药前体途径（XPR）和氯前体途径（CPR）。在这个项目中，PPV和PPV衍生物将根据需要的产品通过这些途径合成。PPV将由黄原酸前驱体合成，从而得到更无定形的聚合物。对热消除反应机理和反应动力学进行了分析。这将提供前驱体的半衰期（货架期），这对聚合物的商业应用很重要。充分了解热消除反应是很重要的，因为热消除反应的条件会影响最终产物的性质。将合成的其他PPV衍生物包括，例如：聚（2,5-二甲氧基-对苯基乙烯）（DM-PPV）；聚（苯氧基苯乙烯）（PO-PPV）和聚（2,3二苯基苯乙烯）（DP-PPV）。它们的热性能将像上面讨论的黄原药前驱体一样进行分析。此外，将采用的光流变技术被称为动态红外线性二色性（DIRLD），直到最近才被应用于电活性聚合物的分析。本研究将分子运动（红外区振动模式）与动态力学分析（DMA）观察到的体宏观性质联系起来。学生将积极参与材料研究，从聚合物前体的合成到通过热分析和DIRLD表征。本科生将与一名研究生和PI一起工作。结果将在每周的小组会议上讨论，在那里可以交换意见并回答问题。这项研究将在地方、区域和国家各级正式提出，并向所提到的期刊提交出版物，以便向材料科学界传播。