Synthesis and self-assembly of biobased poly(limonene carbonate)-block-poly(cyclohexene carbonate) diblock copolymers prepared by sequential ring-opening copolymerization
Synthesis and self-assembly of biobased poly(limonene carbonate)-block-poly(cyclohexene carbonate) diblock copolymers prepared by sequential ring-opening copolymerization
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DOI：
10.1039/c9gc00250b
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发表时间：
2019-05-07
期刊：
影响因子：
9.8
通讯作者：
Greiner, Andreas
中科院分区：
文献类型：
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作者：
Bailer, Janina;Feth, Stefan;Greiner, Andreas
通过β-二亚胺锌催化CO2与反式柠檬烯氧化物和环氧环己烷的活性开环共聚（ROCOP），制备了生物基聚碳酸柠檬烯酯（PLimC）和聚碳酸环己烯酯（PCHC）嵌段聚碳酸酯二嵌段共聚物。反式-柠檬烯氧化物可以容易地从柠檬烯获得，柠檬烯是一种可再生的非食物来源，可以在许多柑橘类水果的果皮中发现，并且是橙子油的主要成分。嵌段形成通过依次加入环氧化物单体来实现。通过1H-1 NMR光谱分析所得的无定形聚（碳酸柠檬烯酯）-嵌段-聚（碳酸环己烯酯）（PLimC-b-PCHC）二嵌段共聚物的组成。通过透射电子显微镜（TEM）和小角X射线散射（SAXS）研究了二嵌段共聚物的自组装成定义良好的本体形态。根据组合物和分子量的圆柱形，层状，和六边形穿孔层状形态的形成进行了观察。
Polycarbonate diblock copolymers with a biobased poly(limonene carbonate) (PLimC) and a poly(cyclohexene carbonate) (PCHC) block were prepared via beta-diiminate zinc catalysed living ring-opening copolymerization (ROCOP) of CO2 and trans-limonene oxide and cyclohexene oxide, respectively. trans-Limonene oxide can be readily obtained from limonene, a renewable non-food source, that can be found in the peel of many citrus fruits and is the main component of orange oil. The block formation was realised by sequential addition of the epoxide monomers. The composition of the resulting amorphous poly(limonene carbonate)-block-poly(cyclohexene carbonate) (PLimC-b-PCHC) diblock copolymers was analysed by H-1 NMR spectroscopy. The self-assembly of the diblock copolymers into well-defined bulk morphologies was studied by transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS). Depending on the composition and molecular weight the formation of cylindrical, lamellar, and hexagonally perforated lamellar morphologies was observed.