writer：Wenwen Wang, Qiuyu Zhang, Feige Guo, Junwei Gu, Changjie Yin
keywords：Controlled radical polymerization .Emulsion polymerization .DPE.Diblock copolymer
source：期刊
specific source：Journal of Polymer Research
Issue time：2011年

Diblock copolymer poly (butyl acrylate)-b-polystyrene (PBA-b-PSt) was prepared by two steps in a complete emulsion system, using DPE (1, 1-diphenylethylene) as free radical control agent. In the first step, butyl acrylate (BA), initiator potassium peroxodisulfate (KPS) and DPE were emulsion polymerized to form P(BA-DPE) precursor. Then the precursor was heated in the presence of a second monomer styrene (St), and block copolymer was synthesized successfully. The structures, molecular weight of precursor and block copolymer were characterized by FTIR, UV–VIS, 1H-NMR and SEC/MALLS. Influence of DPE on polymerization kinetics was also investigated. Meantime, thermal properties of block copolymer were analyzed by TGA and DSC.

http://link.springer.com/article/10.1007/s10965-010-9541-y