ERA-Chemistry: Photo-Triggered End-Group Conversion of Synthetic Polymers Prepared via Light-Induced Initiation Pathways

ERA-Chemistry：通过光诱导引发途径制备的合成聚合物的光触发端基转化

• 批准号: 251443177
• 负责人: Professor Dr. Christopher Barner-Kowollik
• 金额: --
• 依托单位: Institut für Physikalische und Theoretische Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/251443177?language=en
• 关键词: ERA; Chemistry; Photo; Triggered; End

In the proposed project, an Austrian (Graz University of Technology) and a German group (Karlsruhe Institute of Technology, KIT), with a complementary set of skills, join forces for the in-depth study of photolytically triggered radical transformation pathways of synthetic polymers generated via photoinitiation processes. The aim of the project is to arrive at an encompassing mechanistic understanding of the underpinning reactions that occur when well-defined photolytically generated synthetic polymers are subjected to secondary irradiation processes. Data on such processes is very scarce, yet of paramount importance to (i) judge the propensity of photo-generated polymers to change their end-group characteristics upon post-irradiation or during the primary irradiation process, which can significantly affect their performance and (ii) to exploit UV-triggered end-group transformations for the post-modification of photolytically generated polymers. To obtain the required underpinning mechanistic data, well-defined polymers generated via pulsed laser induced polymerization process will be prepared and subjected to a combination of analytical on-line (in-situ UV-irradiation analysis) and off-line (post UV-irradiation analysis) methodologies, including size exclusion chromatography coupled to mass spectrometry (SEC/ESI-MS), chemically-induced dynamic nuclear polarization (CIDNP) NMR as well as electron paramagnetic resonance (EPR) spectroscopy. The result of the project will be a first-time thorough understanding of the radical end-group transformation pathways for a series of photoinitiator/monomer systems and the establishment of guiding principles that dictate these processes as a function of the photolytically introduced end-groups as well as the type of employed monomer.

在拟议的项目中，奥地利（Graz技术大学）和德国集团（Karlsruhe技术研究所，套件）具有一系列互补的技能，并联手进行了对光解触发的合成聚合物的激进转化途径的深入研究通过光电过程生成。该项目的目的是使对良好定义的光解产生的合成聚合物进行次级辐照过程的基础反应具有包含的机械理解。有关此类过程的数据非常稀缺，但对于（i）判断光生成聚合物在辐射后或在主要辐照过程中改变其最终组特征的倾向至关重要，这可能会显着影响其性能和（ ii）利用紫外线触发的末端组转化来进行光解产生的聚合物的变化。为了获得所需的基础机械数据，将准备通过脉冲激光诱导的聚合过程产生明确定义的聚合物，并进行分析（Initu uv-iRRADADIADIATION分析）和离线（后UV-IRRADIATION）（UV-IRRADIATION）的结合分析）方法，包括与质谱法（SEC/ESI-MS），化学诱导的动态核极化（CIDNP）NMR以及电子顺磁共振（EPR）光谱镜的尺寸排除色谱法（SEC/ESI-MS）。该项目的结果将是对一系列光引发剂/单体系统的激进终端转换途径的首次彻底理解，以及建立指导原理，这些原理将这些过程决定是光解引入的终端组的函数，以及使用的单体类型。