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首页> 外文期刊>Journal of Applied Polymer Science >Kinetics studies and characterization of poly(furfuryl alcohol) for use as bio-based furan novolacs
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Kinetics studies and characterization of poly(furfuryl alcohol) for use as bio-based furan novolacs

机译：金属（糠醇）的动力学研究与表征用作生物为基础的呋喃酚醛清漆

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摘要

Poly(furfuryl alcohol) (PFA) is an attractive target for the development of bio-based novolac resins. However, control of the polycondensation reaction is not well understood and side reactions are an important factor for PFA and the development of new resins. The polymerization reactions and kinetics of furfuryl alcohol and 2-furyl ethanol into polymeric resins are detailed in this work. Nuclear magnetic resonance spectroscopy analysis of reaction kinetics, molecular weight analysis, and rheology analysis confirm that the polymerization reaction rate of 2-furyl ethanol is much faster than that of furfuryl alcohol because the addition of this methyl group serves to stabilize the carbocation transition state. Side reactions, such as Diels-Alder crosslinking and in particular branching, are quantified and were found to be much more prevalent in the polymerization of PFA. The glass transition temperature was measured to be 376 K for PFA and only 294 K for poly(2-furyl ethanol). Molecular dynamics simulations showed that the alternative structure that forms in PFA that causes branching results in greater backbone rigidity causing its higher glass transition temperature. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46608.
机译：聚（糠醇）（PFA）是生物基酚醛清漆树脂的发育的有吸引力的靶标。然而，对缩聚反应的控制不太了解，并且副反应是PFA的重要因素和新树脂的发育。在这项工作中详述了聚合反应和2-呋喃基乙醇中的聚合反应和2-呋喃醇的动力学。反应动力学的核磁共振光谱分析，分子量分析和流变分析证实，2-呋喃基的聚合反应速率比糠醇的聚合反应速率快得多，因为加入该甲基用于稳定碳锁定转变状态。量化副反应，例如Diels-Alder交联和特定分支，并且发现在PFA的聚合中更普遍。测量玻璃化转变温度为PFA的376k，仅为Poly（2-呋喃乙醇）。分子动力学模拟表明，在PFA中形成的替代结构，导致分支导致更大的骨干刚度导致其较高的玻璃化转变温度。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46608。

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