Solvent and Polymer Stereochemistry Play Key Roles in Deuterium Exchange and Partial Racemization of Polypropylenes
Solvent and Polymer Stereochemistry Play Key Roles in Deuterium Exchange and Partial Racemization of Polypropylenes
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溶剂和聚合物立体化学在聚丙烯的氘交换和部分外消旋化中发挥关键作用
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
D. Baugh
中科院分区：
文献类型：
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作者：
Brian M. Habersberger;D. Baugh
最近的报道描述了聚烯烃上的氘交换反应；这种同位素标记可以实现强大的分析技术，但等规聚丙烯的交换以前并不成功。在这里，我们报道了等规和间规聚丙烯的成功交换反应，揭示了聚合物立体化学和反应溶剂在吸附和交换机制中发挥的关键作用。在某些情况下，聚合物立体化学的改变伴随着交换，尽管在所有反应中分子量都保持不变。
Recent reports have described deuterium exchange reactions on polyolefins; such isotopic labeling enables powerful analytical techniques, but exchange on isotactic polypropylene was previously unsuccessful. Here, we report successful exchange reactions on isotactic and syndiotactic polypropylenes, revealing the key role that the polymer stereochemistry and reaction solvent play in the mechanism of adsorption and exchange. Alteration of the polymer stereochemistry accompanies exchange in some cases, though molecular weight is preserved in all reactions.