A new stepping chain {[Cu(1,10-phen)]2(H2O3PCH2C6H4C6H4CH2PO3H)2(HO3P- CH2C6H4C6H4CH2PO3H)}n 1 (C66H60Cu2N4O18P6) has been hydrothermally synthesized and charac- terized by single-crystal X-ray diffraction. It belongs...A new stepping chain {[Cu(1,10-phen)]2(H2O3PCH2C6H4C6H4CH2PO3H)2(HO3P- CH2C6H4C6H4CH2PO3H)}n 1 (C66H60Cu2N4O18P6) has been hydrothermally synthesized and charac- terized by single-crystal X-ray diffraction. It belongs to monoclinic, space group C2/c with a = 25.6114(4), b = 18.3781(2), c = 16.5180(3) ? b = 124.0610(10)? V = 6441.00(17) ?, Z = 4, Dc = 1.557 g/cm3, m(Mo-Ka) = 0.887 mm-1, F(000) = 3104, the final R = 0.0853 and wR = 0.1676 for 5585 independent reflections.展开更多
The influences ofphosphite and epoxy soybean oil in combination with liquid calcium/zinc isocaprylates on the thermal stability of flexible poly (vinyl chloride) were studied. The stabilizing effect of poly (vinyl ...The influences ofphosphite and epoxy soybean oil in combination with liquid calcium/zinc isocaprylates on the thermal stability of flexible poly (vinyl chloride) were studied. The stabilizing effect of poly (vinyl chloride) was evaluated by Congo red method, thermoaging test and Thermogravimetric-differential Scanning Calorimetry (TG-DSC). The results showed that the addition of the phosphite or epoxy soybean oil improved the thermal stability of PVC with the calcium/zinc isocaprylates stabilizing system, especially epoxidied soybean oil exhibited a remarkable effect, and the synergism on PVC thermal stability for 3:2 phenyl dioctyl phosphite to epoxidized soybean oil weight ratio was acquired. Accordingly, the rapid mass loss in TG curve occured between 258.9 ℃ and 334.4 ℃, which corresponded to the enthalpy of the pyrogenation of 609.2 J/g. It was also found that the stabilized PVC of the best ratio gave better mechanical and processing properties.展开更多
A new nonlinear partial differential equation (PDE) in 2+1 dimensions is obtained from the mKP equation by means of an asymptotically exact reduction method based on Fourier expansion and spatio-temporal resealing....A new nonlinear partial differential equation (PDE) in 2+1 dimensions is obtained from the mKP equation by means of an asymptotically exact reduction method based on Fourier expansion and spatio-temporal resealing. In order to demonstrate integrability property of the new equation, the corresponding Lax pair is obtained by applying the reduction technique to the Lax pair of the mKP equation.展开更多
基金This research was supported by grants from the State Key Laboratory of Structural Chemistry the National Ministry of Science and Technology of China (001CB1089) the Chinese Academy
文摘A new stepping chain {[Cu(1,10-phen)]2(H2O3PCH2C6H4C6H4CH2PO3H)2(HO3P- CH2C6H4C6H4CH2PO3H)}n 1 (C66H60Cu2N4O18P6) has been hydrothermally synthesized and charac- terized by single-crystal X-ray diffraction. It belongs to monoclinic, space group C2/c with a = 25.6114(4), b = 18.3781(2), c = 16.5180(3) ? b = 124.0610(10)? V = 6441.00(17) ?, Z = 4, Dc = 1.557 g/cm3, m(Mo-Ka) = 0.887 mm-1, F(000) = 3104, the final R = 0.0853 and wR = 0.1676 for 5585 independent reflections.
文摘The influences ofphosphite and epoxy soybean oil in combination with liquid calcium/zinc isocaprylates on the thermal stability of flexible poly (vinyl chloride) were studied. The stabilizing effect of poly (vinyl chloride) was evaluated by Congo red method, thermoaging test and Thermogravimetric-differential Scanning Calorimetry (TG-DSC). The results showed that the addition of the phosphite or epoxy soybean oil improved the thermal stability of PVC with the calcium/zinc isocaprylates stabilizing system, especially epoxidied soybean oil exhibited a remarkable effect, and the synergism on PVC thermal stability for 3:2 phenyl dioctyl phosphite to epoxidized soybean oil weight ratio was acquired. Accordingly, the rapid mass loss in TG curve occured between 258.9 ℃ and 334.4 ℃, which corresponded to the enthalpy of the pyrogenation of 609.2 J/g. It was also found that the stabilized PVC of the best ratio gave better mechanical and processing properties.
基金supported by National Natural Science Foundation of China under Grant No. 10575087the Natural Science Foundation of Zhejiang Province under Grant No. 102053
文摘A new nonlinear partial differential equation (PDE) in 2+1 dimensions is obtained from the mKP equation by means of an asymptotically exact reduction method based on Fourier expansion and spatio-temporal resealing. In order to demonstrate integrability property of the new equation, the corresponding Lax pair is obtained by applying the reduction technique to the Lax pair of the mKP equation.