Scalable production of mechanically tunable block polymers from sugar
Scalable production of mechanically tunable block polymers from sugar
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DOI：
10.1073/pnas.1404596111
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发表时间：
2014-06-10
影响因子：
11.1
通讯作者：
Zhang, Kechun
中科院分区：
文献类型：
--
作者：
Xiong, Mingyong;Schneiderman, Deborah K.;Zhang, Kechun
开发可持续和可生物降解的材料对化学工业的未来发展至关重要。为了使可再生产品具有商业竞争力，它必须在工业规模上经济可行，并且具有类似于或上级于现有石油衍生类似物的性质。很少有生物基聚合物能够满足这一艰巨的挑战。为了解决这一挑战，我们描述了一种有效的生物基路线，以支链内酯，β-甲基-δ-戊内酯（β M δ VL），它可以转化为橡胶状（即，低玻璃化转变温度）聚合物。我们进一步证明，β M Δ VL和丙交酯的嵌段共聚导致一类新的高性能聚酯具有可调的机械性能。这项工作的主要特点包括创建一个总的生物合成路线，以产生β M δ VL，一个有效的半合成方法，采用高产化学反应，将甲羟戊酸转化为β M δ VL，并使用受控聚合技术，以产生明确的PLA-P β M δ VL-PLA三嵌段聚合物，其中PLA代表聚（丙交酯）。这一全面的战略为广泛应用的可持续塑料和弹性体提供了经济可行的方法。
Development of sustainable and biodegradable materials is essential for future growth of the chemical industry. For a renewable product to be commercially competitive, it must be economically viable on an industrial scale and possess properties akin or superior to existing petroleum-derived analogs. Few biobased polymers have met this formidable challenge. To address this challenge, we describe an efficient biobased route to the branched lactone, beta-methyl-delta-valerolactone (beta M delta VL), which can be transformed into a rubbery (i.e., low glass transition temperature) polymer. We further demonstrate that block copolymerization of beta M delta VL and lactide leads to a new class of high-performance polyesters with tunable mechanical properties. Key features of this work include the creation of a total biosynthetic route to produce beta M delta VL, an efficient semisynthetic approach that employs high-yielding chemical reactions to transform mevalonate to beta M delta VL, and the use of controlled polymerization techniques to produce well-defined PLA-P beta M delta VL-PLA triblock polymers, where PLA stands for poly (lactide). This comprehensive strategy offers an economically viable approach to sustainable plastics and elastomers for a broad range of applications.