Acquisition of State-of-the-Art Size Exclusion Chromatography/Multi-Angle Laser Light Scattering (SEC/MALLS) Instrumentation

购置最先进的尺寸排阻色谱/多角度激光光散射 (SEC/MALLS) 仪器

• 批准号: 9802853
• 负责人: Jimmy Mays
• 金额: $ 5.87万
• 依托单位: University of Alabama at Birmingham
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-06-15 至 1999-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9802853&HistoricalAwards=false
• 关键词: Acquisition; State; Art; Size; Exclusion

9802853 Mays This award is for the purchase of a state-of-the-art size exclusion chromatography (SEC) instrument for use in characterizing polymers that are synthesized at the University of Alabama at Birmingham. To maximize the utility of this instrument for accurately and rapidly characterizing a wide range of synthetic materials, we will equip the instrument with superior flow rate stability and with multiple detectors: refractive index, ultraviolet (photodiode array), and multi-angle laser light scattering (MALLS) detectors. The dual concentration detectors are useful in examining compositional variations in many copolymers, while the MALLS detector allows determination of absolute molecular weights without reliance on calibration curves (standards of the same type as the polymer being analyzed are often not available). SEC/MALLS also allows conformational characteristics of polymers to be determined. Use of the MALLS detector along with the differential viscometer that is already available in our laboratory will allow for rapid detection and quantification of long chain branching in polymers. The combination of these various detectors is especially useful in our work with graft copolymers, which combine copolymer character with branching. %%% This project supports equipment used in the development of advanced polymeric materials leading to better paints, improved ceramics, lighter faster electronics, and low cost biodegradable plastics from renewable resources. It will involve the integration of education and research through the participation and training of students, including students from under represented groups through participation in the NSF Alliance for Minority Participation Program. * * *

该合同用于购买最先进的尺寸排除色谱（SEC）仪器，用于表征阿拉巴马大学伯明翰分校合成的聚合物。为了最大限度地利用该仪器准确、快速地表征各种合成材料，我们将为该仪器配备优越的流速稳定性和多个探测器：折射率、紫外线（光电二极管阵列）和多角度激光散射（mall）探测器。双浓度检测器用于检查许多共聚物的组成变化，而MALLS检测器允许在不依赖校准曲线的情况下确定绝对分子量（与所分析的聚合物相同类型的标准通常不可用）。SEC/MALLS还允许确定聚合物的构象特征。使用我们实验室已经提供的MALLS检测器和差分粘度计，可以快速检测和定量聚合物中的长链分支。这些不同探测器的组合在接枝共聚物的研究中特别有用，因为接枝共聚物结合了共聚物的特性和分支。该项目支持用于开发先进聚合物材料的设备，这些材料包括更好的涂料、改进的陶瓷、更轻、更快的电子产品和低成本的可再生资源的可生物降解塑料。它将通过学生的参与和培训来整合教育和研究，包括通过参加国家科学基金会少数民族参与联盟计划的代表性不足群体的学生。* * *