Drache Marco, Tameno Kouanwo Brunette Audree, Namyslo Jan Christoph, Pérocheau Arnaud Sacha, Robert Tobias, Beuermann Sabine
Institute of Technical Chemistry, Clausthal University of Technology, Arnold-Sommerfeld-Strasse 4, 38678 Clausthal-Zellerfeld, Germany.
Institute of Organic Chemistry, Clausthal University of Technology, Leibnizstrasse 6, 38678 Clausthal-Zellerfeld, Germany.
ACS Polym Au. 2024 Nov 26;4(6):540-549. doi: 10.1021/acspolymersau.4c00071. eCollection 2024 Dec 11.
Itaconates available from renewable resources constitute a group of monomers that are used in several types of polymerizations. Their use in free-radical polymerizations (FRPs) is still limited due to the low propagation rate coefficients resulting in low polymerization rates and the occurrence of depropagation which is responsible for limited monomer conversion. Since FRP is considered very robust with few requirements concerning monomer purity, it is still interesting to investigate how itaconate FRP may become feasible. For this reason, copolymerizations of itaconates with other monomers well-suited for FRP are considered. In particular, copolymerization with acrylates appears to be interesting because the propagation rate of these monomers is high and depropagation is not operative at common polymerization temperatures. Copolymerizations of dibutyl and dicyclohexyl itaconate with butyl acrylate were performed to determine the copolymerization reactivity ratios required for tailoring copolymer composition. To limit the number of experiments, copolymerizations were carried out until high conversion and consumption of the individual monomers was obtained from H NMR spectroscopy and quantitative size-exclusion chromatography.
可再生资源制得的衣康酸盐构成了一类用于多种聚合反应的单体。由于其链增长速率系数较低，导致聚合速率较低，且存在解聚现象，致使单体转化率受限，因此它们在自由基聚合（FRP）中的应用仍然有限。由于FRP被认为非常稳定，对单体纯度的要求很少，所以研究衣康酸盐FRP如何变得可行仍然很有意义。出于这个原因，考虑了衣康酸盐与其他适合FRP的单体的共聚反应。特别地，与丙烯酸酯的共聚似乎很有意义，因为这些单体的链增长速率很高，并且在常见的聚合温度下不解聚。进行了二丁基衣康酸酯和二环己基衣康酸酯与丙烯酸丁酯的共聚反应，以确定定制共聚物组成所需的共聚反应竞聚率。为了限制实验次数，进行共聚反应直到通过核磁共振氢谱和定量尺寸排阻色谱法获得高转化率和各单体的消耗情况。
