A convenient method for preparation of amphiphilic monomethoxypoly (ethylene glycol)-polystyrene diblock copolymer by NMRP technique

作者：Shoaeifar Parisa; Abbasian Mojtaba; Entezami Ali Akbar^*

来源：Journal of Polymer Research, 2007, 14(1): 45-52.

DOI：10.1007/s10965-006-9079-1

• amphiphilic copolymer
• diblock copolymer
• 'living' radical polymerization
• poly (ethylene glycol)
• polystyrene
• TEMPO

Amphiphilic block copolymers are macromolecular compounds of great importance from both fundamental scientific and many technological point of views for a large variety of applications. Amphiphilic diblock copolymer containing segments of monomethoxypoly(ethylene glycol) and polystyrene (MPEG-b-PS) was synthesised by a convenient method for preparation of macroinitiator MPEG-TEMPO for 'living' free radical polymerization (NMRP technique). Initially, derivative of MPEG with chlorine function has been prepared in an one-step reaction with thionyl chloride. 1-hydroxy-2,2,6,6-tetramethyl-piperidine (TEMPO-OH) obtained by reduction of 2,2,6,6-tetramethyl-piperidinyl-1-oxy (TEMPO) with sodium ascorbate was coupled with chlorinated MPEG to yield the macroinitiator MPEG terminated with a TEMPO unit (MPEG-TEMPO), which was further used to prepare the diblock copolymer MPEG-b-PS of styrene. The product was purified and identified by H-1 NMR, GPC and, FT-IR.

• 出版日期2007-2