Solvent Effects in Alternating ADMET Polymerization
Solvent Effects in Alternating ADMET Polymerization
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DOI：
10.1021/mz200236r
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发表时间：
2012-04-01
影响因子：
7.015
通讯作者：
Wagener, Kenneth B.
中科院分区：
文献类型：
--
作者：
Schulz, Michael D.;Wagener, Kenneth B.
交替AB共聚物的合成，通过利用α，ω-二烯和α，ω-二丙烯酸酯之间的复分解反应的选择性。与标准的无环二烯复分解（ADMET）聚合不同，二烯和二丙烯酸酯的共聚不需要高真空条件。这项工作利用这一独特的特性，探讨各种溶剂对ADMET聚合的影响。我们发现我们筛选的溶剂的效力的显着变化，CH 2Cl 2产生最高分子量的聚合物。此外，Grubbs第二代催化剂与Hoveyda-Grubbs第二代催化剂在不同溶剂中的性能进行了比较，揭示了在CH 2Cl 2中所得聚合物的分子量的明显差异，但在乙酸中聚合的最终分子量的差异相对较小。
Alternating AB copolymers were synthesized by exploiting the selectivity of the metathesis reaction between alpha,omega-dienes and alpha,omega-diacrylates. Unlike standard acyclic diene metathesis (ADMET) polymerizations, the copolymerization of dienes and diacrylates does not require high vacuum conditions. This work utilizes this unique characteristic to explore the effect of various solvents on ADMET polymerization. We found significant variation in the efficacy of the solvents we screened, with CH2Cl2 yielding the highest molecular weight polymer. Additionally, the performance of Grubbs second generation catalyst was compared with Hoveyda-Grubbs second generation catalyst in different solvents, revealing a stark difference in the molecular weight of the resulting polymers in CH2Cl2 but a relatively minor difference in the final molecular weight from polymerizations in acetic acid.