采用开环聚合法合成聚环氧氯丙烷中间体,再分别与N-甲基咪唑和吡啶反应合成了聚醚咪唑型离子液体(PIIL)与聚醚吡啶型离子液体(PPIL),并用红外与核磁进行结构表征。然后将合成的2种聚醚离子液体分别与酚醛树脂预聚物共混,制备了改性酚醛...采用开环聚合法合成聚环氧氯丙烷中间体,再分别与N-甲基咪唑和吡啶反应合成了聚醚咪唑型离子液体(PIIL)与聚醚吡啶型离子液体(PPIL),并用红外与核磁进行结构表征。然后将合成的2种聚醚离子液体分别与酚醛树脂预聚物共混,制备了改性酚醛树脂。研究了2种聚醚离子液体及其用量对改性酚醛树脂的拉伸剪切强度、冲击强度及游离醛释放量的影响。结果表明:聚醚型离子液体的添加明显改善了酚醛树脂的胶合性能和冲击强度,并降低了游离醛含量。聚醚咪唑离子液体改性酚醛树脂的性能优于聚醚吡啶型离子液体,其拉伸剪切强度从最初的1.15 MPa提高到6.94 MPa,冲击强度从最初的2.10 k J/m2提高到9.51 k J/m2,游离醛含量从最初的1.76%降低到0.14%。展开更多
The microstructures and thermodynamic properties of mixed systems comprising pyridinium ionic liquid[HPy][BF_(4)]and acetonitrile at different mole fractions were studied using molecular dynamics simulation in this wo...The microstructures and thermodynamic properties of mixed systems comprising pyridinium ionic liquid[HPy][BF_(4)]and acetonitrile at different mole fractions were studied using molecular dynamics simulation in this work.The following properties were determined:density,self-diffusion coefficient,excess molar volume,and radial distribution function.The results show that with an increase in the mole fraction of[HPy][BF_(4)],the self-diffusion coefficient decreases.Additionally,the excess molar volume initially decreases,reaches a minimum,and then increases.The rules of radial distribution functions(RDFs)of characteristic atoms are different.With increasing the mole fraction of[HPy][BF_(4)],the first peak of the RDFs of HA1-F decreases,while that of CT6-CT6 rises at first and then decreases.This indicates that the solvent molecules affect the polar and non-polar regions of[HPy][BF_(4)]differently.展开更多
文摘采用开环聚合法合成聚环氧氯丙烷中间体,再分别与N-甲基咪唑和吡啶反应合成了聚醚咪唑型离子液体(PIIL)与聚醚吡啶型离子液体(PPIL),并用红外与核磁进行结构表征。然后将合成的2种聚醚离子液体分别与酚醛树脂预聚物共混,制备了改性酚醛树脂。研究了2种聚醚离子液体及其用量对改性酚醛树脂的拉伸剪切强度、冲击强度及游离醛释放量的影响。结果表明:聚醚型离子液体的添加明显改善了酚醛树脂的胶合性能和冲击强度,并降低了游离醛含量。聚醚咪唑离子液体改性酚醛树脂的性能优于聚醚吡啶型离子液体,其拉伸剪切强度从最初的1.15 MPa提高到6.94 MPa,冲击强度从最初的2.10 k J/m2提高到9.51 k J/m2,游离醛含量从最初的1.76%降低到0.14%。
文摘The microstructures and thermodynamic properties of mixed systems comprising pyridinium ionic liquid[HPy][BF_(4)]and acetonitrile at different mole fractions were studied using molecular dynamics simulation in this work.The following properties were determined:density,self-diffusion coefficient,excess molar volume,and radial distribution function.The results show that with an increase in the mole fraction of[HPy][BF_(4)],the self-diffusion coefficient decreases.Additionally,the excess molar volume initially decreases,reaches a minimum,and then increases.The rules of radial distribution functions(RDFs)of characteristic atoms are different.With increasing the mole fraction of[HPy][BF_(4)],the first peak of the RDFs of HA1-F decreases,while that of CT6-CT6 rises at first and then decreases.This indicates that the solvent molecules affect the polar and non-polar regions of[HPy][BF_(4)]differently.
