The complex, {[La2(β ala)6(H2O)4](ClO4)6·H2O}n, was synthesized in aqueous solution and its crystal structure was determined by X ray diffraction method .The crystal is triclinic with space group of <IMG SRC=...The complex, {[La2(β ala)6(H2O)4](ClO4)6·H2O}n, was synthesized in aqueous solution and its crystal structure was determined by X ray diffraction method .The crystal is triclinic with space group of <IMG SRC="IMAGE/04260088.JPG"HEIGHT=11 WIDTH=12>.The cell parameters are a=0.946(1)nm, b=1.2917(1)nm, c=2.1726(3)nm,α=76.79(1)°, β=80.85(1)°,γ=83.35(1)°, V=2.5429(5)nm3, Z=2, Dc=1.958g·cm-3.The complex is an one dimensional infinite chain. The coordination number of lanthanum ion is nine, forming a distorted tricapped trigonal prism.展开更多
The effect of a new liquid crystalline copolymer(LCP-H2) on the crystallization structure of isotactic polypropylene(iPP) was investigated using wide-angle X-ray diffraction.The experimental results show that LCP-H2 o...The effect of a new liquid crystalline copolymer(LCP-H2) on the crystallization structure of isotactic polypropylene(iPP) was investigated using wide-angle X-ray diffraction.The experimental results show that LCP-H2 of low mass fraction can induce β-form in iPP.The nucleating activity of LCP-H2 mainly depended on its content and crystallization temperature.The content of β-form(Kβ) increased with increasing the nucleator content and crystallization temperature,Kβ value reached a maximum value(35%) when the nucleator mass fraction was 0.8% and the crystallization temperature was 125 ℃.展开更多
文摘The complex, {[La2(β ala)6(H2O)4](ClO4)6·H2O}n, was synthesized in aqueous solution and its crystal structure was determined by X ray diffraction method .The crystal is triclinic with space group of <IMG SRC="IMAGE/04260088.JPG"HEIGHT=11 WIDTH=12>.The cell parameters are a=0.946(1)nm, b=1.2917(1)nm, c=2.1726(3)nm,α=76.79(1)°, β=80.85(1)°,γ=83.35(1)°, V=2.5429(5)nm3, Z=2, Dc=1.958g·cm-3.The complex is an one dimensional infinite chain. The coordination number of lanthanum ion is nine, forming a distorted tricapped trigonal prism.
文摘The effect of a new liquid crystalline copolymer(LCP-H2) on the crystallization structure of isotactic polypropylene(iPP) was investigated using wide-angle X-ray diffraction.The experimental results show that LCP-H2 of low mass fraction can induce β-form in iPP.The nucleating activity of LCP-H2 mainly depended on its content and crystallization temperature.The content of β-form(Kβ) increased with increasing the nucleator content and crystallization temperature,Kβ value reached a maximum value(35%) when the nucleator mass fraction was 0.8% and the crystallization temperature was 125 ℃.
