Tischer Thomas, Gralla-Koser Robert, Trouillet Vanessa, Barner Leonie, Barner-Kowollik Christopher, Lee-Thedieck Cornelia
Institute for Applied Materials (IAM), Karlsruhe Institute of Technology (KIT) and Karlsruhe Nano Micro Facility (KNMF), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
Preparative Macromolecular Chemistry, Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 18, 76131 Karlsruhe, Germany.
ACS Macro Lett. 2016 Apr 19;5(4):498-503. doi: 10.1021/acsmacrolett.6b00106. Epub 2016 Mar 30.
Single molecule force spectroscopy (SMFS) is employed to gain insight into reversible addition-fragmentation chain transfer (RAFT) polymerization processes with living characteristics on glass surfaces. Surface-initiated (SI)-RAFT was selected to grow poly(hydroxyethyl methacrylate) (PHEMA). After aminolysis of the RAFT chain termini, thiol moieties serve as anchoring points for the gold tip of an atomic force microscope. The results allow to directly monitor the macromolecular growth of the surface-initiated polymerization. The obtained SMFS-based molecular weight distribution data of the polymers present on the surface indicate that the RAFT chain extension proceeds linearly with time up to high conversions. The current study thus adds SMFS as a valuable tool for the investigation of SI-RAFT polymerizations.
单分子力谱（SMFS）被用于深入了解在玻璃表面具有活性特征的可逆加成-断裂链转移（RAFT）聚合过程。选择表面引发（SI）-RAFT来生长聚甲基丙烯酸羟乙酯（PHEMA）。在对RAFT链端进行氨解后，硫醇部分作为原子力显微镜金探针的锚定点。这些结果使得能够直接监测表面引发聚合的大分子生长。基于SMFS获得的表面聚合物分子量分布数据表明，RAFT链增长随时间线性进行直至高转化率。因此，本研究将SMFS作为研究SI-RAFT聚合的一种有价值的工具。
