JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2013
·Vol. 51
·期 8
·1690-1694
·
IF 3.543
Yun-Hai Yu,Xiao-Hui Liu,Di Jia,Bo-Wen Cheng,Yuan-Lin Ren,Fei-Jun Zhang,Hui-Na Li,Peng Chen,Shan Xie
Graphical A universal high reactive ligand, Me 6 TREN, was successfully explored as the reducing agent for the ambient temperature copper-mediated LRP of AN. The key to success is ascribed to the optimized Me 6 TREN amount and reaction conditions employed, producing ideal living free radical polymerization characteristics. The very high chain-end functionality of the resultant polymer has been confirmed by GPC and 1 H NMR analyses as well as the chain-extension reaction.
研究领域:
高分子化学
·
聚合反应
·
功能高分子
·
可控自由基聚合
·
材料化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2012
·Vol. 50
·期 24
·4995-4999
·
IF 3.919
Zhihai Hao,Hou Chen,Delong Liu,Lijun Fan
Sn(0)-mediated single electron transfer-living radical polymerization (SET-LRP) of acrylonitrile (AN) with carbon tetrachloride (CCl 4 ) as initiator and hexamethylenetetramine (HMTA) as ligand in N, N -dimethylformamide (DMF) was studied. The polymerization obeyed first order kinetic. The molecular weight of polyacrylonitrile (PAN) increased linearly with monomer conversion and PAN exhibited narrow molecular weight distributions. Increasing the content of Sn(0) resulted in an increase in the molecular weight and the molecular weight distribution. Effects of ligand and initiator were also investigated. The block copolymer PAN- b -polymethyl methacrylate with molecular weight at 126,130 and polydispersity at 1.36 was successfully obtained. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012
研究领域:
高分子化学
·
聚合反应
·
功能高分子
·
材料化学
·
有机合成
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 25
·
IF 1.768
Xiao-Hui Liu,Fei-Jun Zhang,Hui-Na Li,Xiao-Hui Hu,Wen-Li Di,Shuang Zhao
A facile, safe, and inexpensive reducing agent, sodium hypophosphite (NaH 2 PO 2 ·H 2 O), has been successfully used to perform ambient temperature living radical polymerizations of methyl methacrylate (MMA) and styrene (St). The rapid radical polymerizations were readily obtained at 25°C, i.e., MMA reached a conversion of ca 90% after 2.5 h, and St reached a conversion of ca 80% after 40 h. The polymerizations of MMA and St exhibited excellent living/controlled nature, as evidenced by pseudo first-order kinetics of polymerization, linear evolution of molecular weights with increasing monomer conversions, and narrow molecular weight distributions. The various experimental parameters—ligand, solvent, and molar ratio of NaH 2 PO 2 ·H 2 O to CuSO 4 ·5H 2 O—were varied to improve the control of polymerization, molecular weight, and molecular weight distribution. 1 H NMR analyses and chain-extension reactions confirm the high chain-end functionality of the resultant poly(methyl methacrylate) and polystyrene. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42123.
研究领域:
高分子化学
·
聚合反应工程
·
功能高分子材料
·
可控/活性聚合
·
绿色合成方法
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2013
·Vol. 51
·期 7
·1559-1564
·
IF 3.543
Xiao-Hui Liu,Yun-Hai Yu,Di Jia,Bo-Wen Cheng,Fei-Jun Zhang,Hui-Na Li,Peng Chen,Shan Xie
Single electron transfer living radical polymerization of methyl methacrylate catalyzed by the in situ prepared Cu(0) at ambient temperature was first examined using various metallic powders, including Zn(0), Ni(0), Mg(0), and Fe(0). Importantly, the polymerization initiated with Ni(0)/EBiB/CuBr 2 /PMDETA system exhibited optimal living/controlled nature and generated polymers with polydispersity index as low as 1.04 for 75.27% conversion and controlled molecular weights close to theoretical ones. A wide of range of Cu(II) salts were also investigated as catalyst sources instead of CuBr 2 . The recycling of Ni(0) was very convenient due to its magnetic property, which enables its extensive application. © 2013 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013
研究领域:
高分子化学
·
材料科学
·
催化化学
·
有机合成
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2012
·Vol. 50
·期 23
·4871-4878
·
IF 3.919
Lijun Fan,Hou Chen,Zhihai Hao,Zhi Tan
A novel high oil-absorbing crosslinked gel was synthesized by copolymerization of butyl methacrylate (BMA) with a small amount of pentaerythritol triacrylate (PETA) crosslinker using single electron transfer-living radical polymerization (SET–LRP) initiated with carbon tetrachloride (CCl 4 ) and catalyzed by Cu(0)/hexamethylenetetramine (HMTA) in N, N-dimethylformamide (DMF). The polymerization followed first-order kinetics as indicated by linear increase of monomer concentration with reaction time. Effects of reaction temperature, crosslinker, initiator, and catalyst on the oil-absorbing properties of the crosslinked gel were investigated in detail. The oil absorptions of the crosslinked gel to chloroform, toluene could reach 51.9, 34.5 g/g, respectively. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012
研究领域:
高分子化学
·
功能材料
·
环境修复
·
石油泄漏处理
·
聚合物科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）