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Citation: YANG Yun-Feng, GAO Bao-Jiao, YU Shi-Kui, XU Li. Synthesis of Water-Soluble Amphiphilic Block Copolymer by Self-Emulsifying Microemulsion Method[J]. Chinese Journal of Applied Chemistry, ;2004, 21(7): 696-701. shu

Synthesis of Water-Soluble Amphiphilic Block Copolymer by Self-Emulsifying Microemulsion Method

1.
Department of Chemical Engineering, North China Institute of Technology, Taiyuan 030051

Corresponding author: GAO Bao-Jiao,
Received Date: 25 August 2003
Available Online: 30 December 2003
Fund Project: 山西省自然科学基金(94012)资助项目 (94012)

The microemulsion system for the copolymerization of acrylamide (AM) and styrene (St) was prepared using copolymer (PAM-b-PSt) of small molecular weight and good surface activity as macromolecular surfactant.The phase diagram of three components was drawn up,from which a suitable copolymerization system was selected and an amphiphilic block copolymer PAM-b-PSt with high molecular weight was synthesized by self-emulsifying microemulsion copolymerization.The composition of the copolymer was analyzed by FTIR and UV method,the block architecture was characterized by DSC,and the hydrophobic association behaviour of the copolymer was investigated by fluorescence probe technique and apparent viscosity measurement.The results show that the microemulsion copolymerization system of O/W type can also be prepared using macromolecular surfactant.Only 3 g of the macromolecular surfactant was enough to disperse 0.25 g St into water.The method has advantages of having high emulsification efficiency and avoiding purification processes of polymers to remove the surfactant.The pure copolymer PAM-b-PSt could be obtained in one step process.The product has excellent hydrophobic association behaviour and thickening property,and the viscosity of its aqueous solution is about 5 times higher than that of PAM aqueous solution under the same concentration (ω(p)=0.5%).
- acrylamide,
- styrene,
- amphiphilic block copolymer,
- self-emulsifying microemulsion copolymerrization,
- hydrophobic associated polymer
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Synthesis of Water-Soluble Amphiphilic Block Copolymer by Self-Emulsifying Microemulsion Method

南开大学师唯/华北电力大学（保定）刘景维：二维配位聚合物中有序的亲锂冠醚位点用于无枝晶锂沉积

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通讯作者: 陈斌, bchen63@163.com