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首页> 外文期刊>Journal of Applied Polymer Science >Building of a sulfonyl-group-functionalized monomer whose polymer is able to catalyze biodiesel formation
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Building of a sulfonyl-group-functionalized monomer whose polymer is able to catalyze biodiesel formation

机译：磺酰基基团官能化单体的构建，该单体能够催化生物柴油的形成

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A linear polymer containing sulfonyl groups was synthesized from a vinyl monomer to use its acid group as a catalyst of the esterification of oleic acid to form biodiesel. First, synthesis optimization of the monomer was carried out in an aqueous system. This molecule was obtained in an excellent yield, where the pH and reaction time were decisive factors in the synthesis performance. The vinyl monomer was then polymerized, and the catalytic activity of the sulfonic acid could be demonstrated in the esterification of oleic acid with short-chain alcohols. The increase in the catalyst content resulted in a higher concentration of the carbonyl group activated, and this was followed by faster esterification kinetics. The highest yield (98 mol %) was reached after 20 min when a 10 mol-% of catalyst was used. A larger size alcohol led to slower esterification kinetics because its ability as a nucleophile was decreased by steric impediment. The sulfonyl group in polymer 4, an aryl sulfonic acid polymer, proved to be an acid almost as efficient as sulfuric acid, although the former worked in a heterogeneous system. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41957.
机译：由乙烯基单体合成含有磺酰基的线性聚合物，以其酸基作为油酸酯化形成生物柴油的催化剂。首先，在水性体系中进行单体的合成优化。该分子以优异的产率获得，其中pH和反应时间是合成性能的决定性因素。然后使乙烯基单体聚合，并且可以通过油酸与短链醇的酯化反应来证明磺酸的催化活性。催化剂含量的增加导致活化的羰基浓度更高，并且随后具有更快的酯化动力学。当使用10摩尔％的催化剂时，在20分钟后达到最高产率（98摩尔％）。较大尺寸的醇会导致酯化动力学变慢，因为其作为亲核试剂的能力因空间位阻而降低。聚合物4（一种芳基磺酸聚合物）中的磺酰基被证明是一种几乎与硫酸一样有效的酸，尽管前者在异质体系中起作用。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41957。

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