The synthesis of a novel amphiphilic comb-shaped copolymer consisting of a main chain of styrene-(N-(4- hydroxyphenyl) maleimide)(SHMI) copolymer and poly(ethylene glycol) methyl ether methacrylate(PEGMA) side groups was achieved by atom transfer radical polymerization(ATRP).The amphiphilic copolymers were characterized by ~1H-NMR, Fourier transform infrared(FTIR) spectroscopy and gel permeation chromatography(GPC).From thermogravimetric analysis (TGA),the decomposition temperature of SHMI-g-PEGMA is low...
通过原子转移自由基聚合技术（Atom Transfer Radical Polymerization，ATRP）合成聚乙二醇单甲醚／聚甲基丙烯酸甲酯（MPEG-b-PMMA）两亲性嵌段共聚物，运用傅立叶变换红外光谱（FT-IR）、核磁共振氢谱（^1H-NMR）及凝胶渗透色谱（GPC）对所合成的两亲性嵌段共聚物进行表征。然后，将所合成的MPEG-b-PMMA两亲性嵌段共聚物与聚偏氟乙烯（PVDF）进行溶液共混，通过浸没沉淀相转化法制备MPEG-b-PMMA／PVDF共混超滤膜。膜性能测试结果表明：与PVDF膜相比，MPEG-b-PMMA／PVDF共混膜的亲水性、抗污染性、纯水通量及BSA截留率等性能均得到明显提高．
The preparation and properties of asymmetric poly(vinyldiene fluoride)(PVDF)membranes are described in this study.Membranes were prepared from a casting solution of PVDF,N,N-dimethylacetamide(DMAc)solvent and water- soluble poly(ethylene glycol)(PEG)additives by immersing them in water as coagulant medium.Experiments showed that when PEG molecular weight increased,the changes in the resultant membranes' morphologies and properties showed a transition point at PEG6000.This indicated that PEG with a relati...
A novel amphiphilic ABA type triblock copolymer with well-defined glycopolymer segments was suc- cessfully synthesized via the atom transfer radical polymerization (ATRP) technique, using a bromo-terminated difunctional polysulfone as macroinitiator. The difunctional polysulfone macroini- tiator was prepared by esterifying the phenolic end groups of polysulfone to α-haloesters. This macroinitiator was then used to initiate the polymerization of a glucose-carrying monomer, 3-O-methacryloyl-1,2:5,6-di-O-isopropylidene-D-glucofuranose (MAIpG), resulting an ABA type triblock copolymer. After acidolysis treatment, the isopropylidenyl groups of the protected sugar residues were removed, thus the amphiphilic ABA type triblock copolymer with well-defined glycopolymer segments was obtained. The polymers obtained were identified by FT-IR, 1H-NMR, GPC, and TGA. The self-assembly behavior of the amphiphilic glycopolymer in selective solvent (e.g. DMF/H2O) system was also preliminarily explored. The resultant amphiphilic glycopolymer shows potential applications in the fields of controlled release and delivery of drugs, micro-reactors, nano-materials, medical devices, and so on.
WANG JianYu QIAN YanLing ZHANG Fan ZHU BaoKu XU YouYi
