In order to improve the toughness of the cured aromatic tetrafunctional epoxy resins, a dlmer rarboxylic acid named dlmer fatty acid （DFA） was used to modify an aromatic tetrafunctional epoxy, N, N, N＇, N＇-tetragl...In order to improve the toughness of the cured aromatic tetrafunctional epoxy resins, a dlmer rarboxylic acid named dlmer fatty acid （DFA） was used to modify an aromatic tetrafunctional epoxy, N, N, N＇, N＇-tetraglycidyl-2,2-bis [ 4-（ 4-aminophcuoxy ） phenyl ] propane （TGBAPP）. The curing behaviors of DFA- TGBAPP/MNA （ methyl nadic anhydride） systems were studied by differential scanning calorimetry （DSC） method. And the thermal properties of the cured epoxy resin were investigated with the thermo-gravimetric analysis （TGA） and dynamic mechanical analysis （DMA）. Besides, the toughness was characterized with the impact strength tested by charpy impact testing. The results indicated that the modification would improve the curing reactions, and the curing temperatures were decreased with the increasing content of DFA. The thermal properties were not influenced obviously, and the toughness could be improved when the epoxy resin was modified with DFA.展开更多
A new Zn（Ⅱ） complex,[Zn（1,2,3-HBTC）（L）]2（1,L = 2-（2-chloro-6-fluorophenyl）-1H-imidazo[4,5-f][1,10]phenanthroline and 1,2,3-H3 BTC = 1,2,3-benzentricarboxylic acid）,was synthesized under hydrothermal conditi...A new Zn（Ⅱ） complex,[Zn（1,2,3-HBTC）（L）]2（1,L = 2-（2-chloro-6-fluorophenyl）-1H-imidazo[4,5-f][1,10]phenanthroline and 1,2,3-H3 BTC = 1,2,3-benzentricarboxylic acid）,was synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction.It crystallizes in triclinic,space group P1 with a = 10.455（2）,b = 11.533（2）,c = 12.499（3） A,α = 116.97（3）,β = 94.08（3）,γ = 103.29（3）o,V = 1280.2（4） A^3,Z = 1,C56H28Cl2F2N8O12Zn2,Mr = 1244.50,Dc = 1.614 g/cm^3,F（000） = 628,μ（Mo Ka） = 1.124 mm^-1,R = 0.0502 and w R = 0.1417.In compound 1,two 1,2,3-HBTC anions bridge two Zn（Ⅱ） atoms to give a dimeric structure with Zn···Zn distance of 3.15 A.Adjacent dimers interact through π-π stackings between two L ligands to result in a supramolecular layer.Moreover,N–H···O and O–H···N hydrogen bonds further stabilize the 2D supramolecular architecture of 1.In addition,the luminescent property of 1 has been studied.展开更多
The dimeric property of bis(2 - ethylhexyl) phosphoric acid(HDEHP) in different diluents has been studied. The experimental results show that the dimeric degree of HDEHP increases with the decrease of the polarity of ...The dimeric property of bis(2 - ethylhexyl) phosphoric acid(HDEHP) in different diluents has been studied. The experimental results show that the dimeric degree of HDEHP increases with the decrease of the polarity of diluents.This kind of effect has been discussed from the point of view of intermolecular interactions between the extractant molecules and the diluent ones. The dimeric constantswere related to the physical constants and experiencial parameters of the diluents.The following expression hasbeen obtained lg K2 =6 .4 5 9- 4 .4 6 4 (ε- 1) /(2 ε+ 1) - 1.96 5 (n D2 - 1) /(n D2 +1) - 3.199α- 5 .6 6β.展开更多
基金Shanghai Leading Academic Discipline Project,China(No.s30107)the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning,Chinathe Project of Shanghai Science and Technology Committee,China(No.12520500300)
文摘In order to improve the toughness of the cured aromatic tetrafunctional epoxy resins, a dlmer rarboxylic acid named dlmer fatty acid （DFA） was used to modify an aromatic tetrafunctional epoxy, N, N, N＇, N＇-tetraglycidyl-2,2-bis [ 4-（ 4-aminophcuoxy ） phenyl ] propane （TGBAPP）. The curing behaviors of DFA- TGBAPP/MNA （ methyl nadic anhydride） systems were studied by differential scanning calorimetry （DSC） method. And the thermal properties of the cured epoxy resin were investigated with the thermo-gravimetric analysis （TGA） and dynamic mechanical analysis （DMA）. Besides, the toughness was characterized with the impact strength tested by charpy impact testing. The results indicated that the modification would improve the curing reactions, and the curing temperatures were decreased with the increasing content of DFA. The thermal properties were not influenced obviously, and the toughness could be improved when the epoxy resin was modified with DFA.
基金Supported by the Institute Foundation of Siping City(No.2013036)
文摘A new Zn（Ⅱ） complex,[Zn（1,2,3-HBTC）（L）]2（1,L = 2-（2-chloro-6-fluorophenyl）-1H-imidazo[4,5-f][1,10]phenanthroline and 1,2,3-H3 BTC = 1,2,3-benzentricarboxylic acid）,was synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction.It crystallizes in triclinic,space group P1 with a = 10.455（2）,b = 11.533（2）,c = 12.499（3） A,α = 116.97（3）,β = 94.08（3）,γ = 103.29（3）o,V = 1280.2（4） A^3,Z = 1,C56H28Cl2F2N8O12Zn2,Mr = 1244.50,Dc = 1.614 g/cm^3,F（000） = 628,μ（Mo Ka） = 1.124 mm^-1,R = 0.0502 and w R = 0.1417.In compound 1,two 1,2,3-HBTC anions bridge two Zn（Ⅱ） atoms to give a dimeric structure with Zn···Zn distance of 3.15 A.Adjacent dimers interact through π-π stackings between two L ligands to result in a supramolecular layer.Moreover,N–H···O and O–H···N hydrogen bonds further stabilize the 2D supramolecular architecture of 1.In addition,the luminescent property of 1 has been studied.
文摘The dimeric property of bis(2 - ethylhexyl) phosphoric acid(HDEHP) in different diluents has been studied. The experimental results show that the dimeric degree of HDEHP increases with the decrease of the polarity of diluents.This kind of effect has been discussed from the point of view of intermolecular interactions between the extractant molecules and the diluent ones. The dimeric constantswere related to the physical constants and experiencial parameters of the diluents.The following expression hasbeen obtained lg K2 =6 .4 5 9- 4 .4 6 4 (ε- 1) /(2 ε+ 1) - 1.96 5 (n D2 - 1) /(n D2 +1) - 3.199α- 5 .6 6β.
文摘目的:采用高分辨液质联用技术快速分析和推定泊马度胺胶囊中的降解产物。方法:采用Agilent ZORBAX SB-CN色谱柱(150 mm×4.6 mm,5 mm),以质谱兼容性0.1%甲酸水溶液-甲醇为流动相,梯度洗脱,流速1.0 m L·min^(-1),检测波长为240 nm,对泊马度胺胶囊经酸、碱、高温、氧化及光照破坏产生的有关物质进行分离。通过电喷雾正离子化四极杆-飞行时间质谱(Q-TOF/MS)测定各有关物质的精确分子质量及分子式,再根据二级质谱(MS/MS)碎裂信息推定未知降解产物结构;喷雾电压3.5 k V,雾化器流量11 L·min^(-1),去溶剂气温度350℃,离子源气压310 k Pa,驱簇电压120 V,MS扫描范围m/z 100~1 000,MS/MS扫描范围m/z 50~800,MS/MS碰撞能量10~20 e V。结果:建立的HPLC分析方法下各有关物质与主成分分离良好,在强制降解供试品溶液中共检测到14个主要有关物质,经液质初步分析推定了它们的结构分别为泊马度胺的水解产物(有关物质1、2、3、7和8),3-氨基-1,2-苯二甲酸(有关物质4),2-硝基-6-[[(2,6-二氧代-3-哌啶基)氨基]羰基]-苯甲酸(有关物质5),2-亚硝基-6-[[(2,6-二氧代-3-哌啶基)氨基]羰基]-苯甲酸(有关物质6),N′-[2-(2,6-二氧代哌啶-3-基)-1,3-二氧代-4-异二氢吲哚]-乙酰肼(有关物质9),泊马度胺羟基化产物(有关物质10和12),3-硝基-N-(2,6-二氧-3-哌啶基)苯邻二甲酰亚胺(有关物质11),3-甲基氨基-N-(2,6-二氧-3-哌啶基)苯邻二甲酰亚胺(有关物质13),泊马度胺的羟基化二聚体产物(有关物质14)。结论:新建立的液质联用方法适用于泊马度胺胶囊中有关物质的检查,为泊马度胺制剂质量控制和工艺优化提供重要参考。
