Reversible Addition-fragmentation Chain Transfer Polymerization Grafted from Silicon Surface to Prepare Poly(methyl methacrylate) Brushes

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2008,（10）
• 页码范围: 1929-1934
• 页数: 6页
• 语种: 英文

摘要

Poly(methyl methacrylate) (PMMA) brushes grafted from silicon wafer surface were prepared using a reversible addition fragmentation chain transfer (RAFT) technique. 4-Cyano-4-((thiobenzoyl)sulfanyl)pentanoic suc-cinimide ester, a novel RAFT agent, was immobilized on the silicon wafer surface. RAFT polymerizations were then conducted from the silicon surface to polymerize from the silicon surface. Kinetic studies revealed that the thickness of the PMMA film increased almost linearly with the polymerization time after 2 h, indicating that the chain growth from the surface was a controlled process with a "living" character. The PMMA brushes were characterized using ellipsometry, X-ray photoelectron spectra (XPS), atomic force microscopy (AFM) and contact angle measurements.