通过PLP-MALDI-ToF-MS获得的甲基甲基酸的联合聚合动力学
Robin X E Willemse1, Alex M van Herk
1Laboratory of Polymer Chemistry, Department of Chemical Engineering, Eindhoven University of Technology, The Netherlands. tokunaga@cat,hokudai.ac.jp
Journal of the American Chemical Society
|March 30, 2006
概括
这项研究将脉冲激光聚合与MALDI-ToF-MS相结合,以分析 styrene-methyl methacrylate 共聚合物. 它提供了迄今为止最准确的共聚合参数,详细说明了分子质量,组成和速率.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 频谱学是一种光谱学.
背景情况:
- 共聚合动力学对于控制聚合物特性至关重要.
- 精确确定反应率和终止模式是必不可少的.
- 现有的方法往往缺乏关于共聚合物组成和分子量分布的全面数据.
研究的目的:
- 为了研究烯和甲基甲酸甲基的共聚合.
- 为了获得有关终结,激素反应性,分子质量,组成和速率的相互关联数据.
- 为这个系统建立新的,准确的共聚合参数.
主要方法:
- 使用激光激光激光器利用脉冲激光聚合.
- 采用矩阵辅助激光脱吸/离子化飞行时间质谱法 (MALDI-ToF-MS) 进行分析.
- 在15.2°C进行了批量聚合,使用不同度的 styrene 和激光频率.
主要成果:
- 获得了关于终结,激素反应,分子质量和组成的完整,相互关联的数据.
- 使用MALDI-ToF-MS.确定化学成分和分子量分布.
- 获得的新反应率是:r(St) = 0.517,r(MMA) = 0.420,s(St) = 0.296,s(MMA) = 0.262. 这样,我们得到了新的反应率:r(St) = 0.517,r(MMA) = 0.420,s(St) = 0.296,s(MMA) = 0.262.
结论:
- 脉冲激光共聚和MALDI-ToF-MS的组合是非常有效的.
- 该研究提供了迄今为止最准确和最完整的 styrene-methyl methacrylate 共聚合参数.
- 蒙特卡洛模拟验证了实验结果.
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