Reactivity Ratios of Comonomers from a Single MALDI鈥揟oF鈥揗S Measurement at One Feed Composition

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• 作者：Saskia Huijser ; Gerben D. Mooiweer ; Remco van der Hofstad ; Bastiaan B. P. Staal ; Jon Feenstra ; Alex M. van Herk ; Cor E. Koning ; Rob Duchateau
• 刊名：Macromolecules
• 出版年：2012
• 出版时间：June 12, 2012
• 年：2012
• 卷：45
• 期：11
• 页码：4500-4510
• 全文大小：537K
• 年卷期：v.45,no.11(June 12, 2012)
• ISSN：1520-5835

文摘

The reactivity ratios in a copolymerization are needed to predict the microstructure (random, gradient, block or alternating) of the produced copolymer. This microstructure reflects on the physical properties of the polymeric material. Conventional ways to determine these reactivity ratios demand in most cases tedious laboratory work and several experiments at different monomer feed compositions. Here, a novel method is described to derive these ratios from a single MALDI鈥揟oF鈥揗S spectrum obtained at one feed composition by employing either a Monte Carlo approach to numerically simulate a first order Markov chain or the analytical form of the first order Markov chain. A single MALDI鈥揟oF鈥揗S spectrum proved to give very good estimates of the reactivity ratios of comonomers from copolymer鈥檚 synthesized by free radical polymerization, ring-opening polymerization of lactones and lactides, or ring-opening copolymerization of anhydrides plus epoxides.