Lamparelli David Hermann, Kleybolte Magdalena Maria, Winnacker Malte, Capacchione Carmine
Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno, Giovanni Paolo II Str., 84084 Fisciano, Italy.
WACKER-Chair of Macromolecular Chemistry, Technische Universität München, Lichtenbergstraße 4 Str., 85747 Garching bei München, Germany.
Polymers (Basel). 2021 Mar 9;13(5):838. doi: 10.3390/polym13050838.
Soluble heterocomplexes consisting of sodium hydride in combination with trialkylaluminum derivatives have been used as anionic initiating systems at 100 °C in toluene for convenient homo-, co- and ter-polymerization of myrcene with styrene and isoprene. In this way it has been possible to obtain elastomeric materials in a wide range of compositions with interesting thermal profiles and different polymeric architectures by simply modulating the alimentation feed and the (monomers)/(initiator systems) ratio. Especially, a complete study of the myrcene-styrene copolymers (PMS) was carried out, highlighting their tapered microstructures with high molecular weights (up to 159.8 KDa) and a single glass transition temperature. For PMS copolymer reactivity ratios, r = 0.12 ± 0.003 and r = 3.18 ± 0.65 and r = 0.10 ± 0.004 and r = 3.32 ± 0.68 were determined according to the Kelen-Tudos (KT) and extended Kelen-Tudos (exKT) methods, respectively. Finally, this study showed an easy accessible approach for the production of various elastomers by anionic copolymerization of renewable terpenes, such as myrcene, with commodities.
由氢化钠与三烷基铝衍生物组成的可溶性杂络合物已被用作阴离子引发体系，于100℃在甲苯中用于月桂烯与苯乙烯和异戊二烯的便捷均聚、共聚和三元聚合。通过这种方式，只需调节进料和（单体）/（引发剂体系）的比例，就有可能获得具有广泛组成、有趣热性能和不同聚合物结构的弹性体材料。特别是，对月桂烯-苯乙烯共聚物（PMS）进行了全面研究，突出了它们具有高分子量（高达159.8 kDa）和单一玻璃化转变温度的渐变微观结构。对于PMS共聚物的竞聚率，分别根据凯伦-图多斯（KT）法和扩展凯伦-图多斯（exKT）法测定出r = 0.12±0.003和r = 3.18±0.65以及r = 0.10±0.004和r = 3.32±0.68。最后，这项研究表明了一种通过可再生萜烯（如月桂烯）与商品进行阴离子共聚来生产各种弹性体的简便方法。
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