Sustainable thermoplastic elastomers derived from plant oil and their “click-coupling” via TAD chemistry
Sustainable thermoplastic elastomers derived from plant oil and their “click-coupling” via TAD chemistry
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DOI：
10.1039/c5gc00822k
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发表时间：
2015-07
期刊：
影响因子：
9.8
通讯作者：
Zhongkai Wang;Liang Yuan;Nathan M. Trenor;L. Vlaminck;Stijn Billiet;A. Sarkar;F. D. Prez;M. Stefik-M.
中科院分区：
文献类型：
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作者：
Zhongkai Wang;Liang Yuan;Nathan M. Trenor;L. Vlaminck;Stijn Billiet;A. Sarkar;F. D. Prez;M. Stefik-M.
我们报道了基于大豆油单体的植物油基三嵌段共聚物的制备。这些单体通过原子转移自由基聚合及随后的链增长反应进行聚合，得到了聚（苯乙烯 - 大豆油丙烯酸酯 - 苯乙烯）（PS - b - PSBA - b - PS）和聚（苯乙烯 - 大豆油甲基丙烯酸酯 - 苯乙烯）（PS - b - PSBMA - b - PS）三嵌段共聚物。通过调节分子结构，获得了从热塑性塑料到热塑性弹性体（TPE）的这些聚合物。我们采用了一种利用三唑啉二酮（TAD）化学的“点击偶联”策略，在三嵌段共聚物的软质中间嵌段之间形成化学连接，其作用类似于物理链缠结。这种方法有助于克服植物油基聚合物的缺点，能够在不牺牲伸长率的情况下提高拉伸强度。循环拉伸试验表明，“点击偶联”的三嵌段共聚物表现出优异的弹性回复特性。
We report the preparation of plant oil based triblock copolymers based on soybean oil monomers. The monomers were polymerized via atom transfer radical polymerization with subsequent chain extension, resulting in poly(styrene-b-soybean oil acrylate-b-styrene) (PS-b-PSBA-b-PS) and poly(styrene-b-soybean oil methacrylate-b-styrene) (PS-b-PSBMA-b-PS) triblock copolymers. These polymers, ranging from thermoplastics to thermoplastic elastomers (TPEs), were obtained by tuning molecular structures. We employed a “click coupling” strategy using triazolinedione (TAD) chemistry to create chemical junctions between the soft middle blocks of the triblock copolymers, which behave similar to physical chain entanglements. This method helps to overcome the drawbacks of plant oil based polymers, allowing for increase of tensile strength without sacrificing elongation. Cyclic tensile tests show that the “click coupled” triblock copolymers exhibit excellent elastic recovery characteristics.