Click-Chemistry: An Alternative Way to Functionalize Poly(2-methyl-2-oxazoline)

摘要

CROP has been used to synthesize well-defined POXZ with a monofunctional (iodomethane) or a bifunctional (1,3-diiodopropane) initiator. POXZ has been functionalized with an azido group at one (-azido-POXZ,  = 3.58 × 103 g · mol−1) or both ends (,ω-azido-POXZ,  = 6.21 × 103 g · mol−1) of the macromolecular chain. The Huisgen 1,3-dipolar cycloaddition has been investigated between azido-POXZ and a terminal alkyne on a small or larger molecule (PEG). In each case, the click reaction has been successful and quantitative. In this way, different telechelic polymers (polymers bearing different functions such as acrylate, epoxide, or carboxylic acid) and block copolymers of POXZ and PEG have been prepared. The polymers have been characterized by means of FTIR, 1H NMR, and SEC.