Christian Doppler Laboratory for Advanced Polymers for Biomaterials and 3D Printing, Getreidemarkt 9, Vienna, 1060, Austria.
Institute of Applied Synthetic Chemistry, Technische Universität Wien, Vienna, 1060, Austria.
Macromol Rapid Commun. 2024 Nov;45(21):e2400323. doi: 10.1002/marc.202400323. Epub 2024 Aug 29.
Vanillyl alcohol has emerged as a widely used building block for the development of biobased monomers. More specifically, the cationic (photo-)polymerization of the respective diglycidyl ether (DGEVA) is known to produce materials of outstanding thermomechanical performance. Generally, chain transfer agents (CTAs) are of interest in cationic resins not only because they lead to more homogeneous polymer networks but also because they strikingly improve the polymerization speed. Herein, the aim is to compare the cationic chain-growth photopolymerization with the thermally initiated anionic step-growth polymerization, with and without the addition of CTAs. Indeed, CTAs lead to faster polymerization reactions as well as the formation of more homogeneous networks, especially in the case of the thermal anionic step-growth polymerization. Resulting from curing above the T of the respective anionic step-growth polymer, materials with outstanding tensile toughness (>5 MJ cm) are obtained that result in the manufacture of potential shape-memory polymers.
香草醇已成为开发生物基单体的常用结构单元。更具体地说，相应的二缩水甘油醚 (DGEVA) 的阳离子（光）聚合已知可产生具有出色热机械性能的材料。通常，链转移剂 (CTA) 在阳离子树脂中很有趣，不仅因为它们导致更均匀的聚合物网络，而且因为它们显着提高聚合速度。在此，目的是比较阳离子链增长光聚合与热引发的阴离子逐步聚合，以及是否添加 CTA。实际上，CTA 会导致聚合反应更快，并且形成更均匀的网络，特别是在热阴离子逐步聚合的情况下。通过在各自的阴离子逐步聚合物的 T 以上固化，获得具有出色拉伸韧性 (>5 MJ cm) 的材料，这导致潜在形状记忆聚合物的制造。
