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Highly Branched Bio-Based Unsaturated Polyesters by Enzymatic Polymerization

机译：高度分支的生物基不饱和聚酯的酶促聚合

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A one-pot, enzyme-catalyzed bulk polymerization method for direct production of highly branched polyesters has been developed as an alternative to currently used industrial procedures. Bio-based feed components in the form of glycerol, pentaerythritol, azelaic acid, and tall oil fatty acid (TOFA) were polymerized using an immobilized Candida antarctica lipase B (CALB) and the potential for an enzymatic synthesis of alkyds was investigated. The developed method enables the use of both glycerol and also pentaerythritol (for the first time) as the alcohol source and was found to be very robust. This allows simple variations in the molar mass and structure of the polyester without premature gelation, thus enabling easy tailoring of the branched polyester structure. The postpolymerization crosslinking of the polyesters illustrates their potential as binders in alkyds. The formed films had good UV stability, very high water contact angles of up to 141° and a glass transition temperature that could be controlled through the feed composition.
机译：已经开发出一种用于直接生产高度支化聚酯的单锅酶催化本体聚合方法，以替代当前使用的工业程序。使用固定化的南极假丝酵母脂肪酶B（CALB）聚合甘油，季戊四醇，壬二酸和妥尔油脂肪酸（TOFA）形式的生物基饲料成分，并研究了酶促合成醇酸树脂的潜力。所开发的方法能够同时使用甘油和季戊四醇（首次使用）作为醇源，并且被发现非常坚固。这允许简单地改变聚酯的摩尔质量和结构而不会过早胶凝，因此使得容易调整支链聚酯结构。聚酯的后聚合交联表明它们在醇酸树脂中作为粘合剂的潜力。所形成的薄膜具有良好的紫外线稳定性，高达141°的非常高的水接触角和可以通过进料组成控制的玻璃化转变温度。

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