以间苯二胺(MPD)、4,4′-二氨基二苯基甲烷(DDM)共混制备了一种低共熔点的芳胺固化剂(M3)。通过示差扫描量热分析研究了聚醚砜(PES)增韧环氧树脂(TDE-85)与M3体系的固化行为,根据Kissinger方法和Crane方法确定了体系的固化动力学模型及...以间苯二胺(MPD)、4,4′-二氨基二苯基甲烷(DDM)共混制备了一种低共熔点的芳胺固化剂(M3)。通过示差扫描量热分析研究了聚醚砜(PES)增韧环氧树脂(TDE-85)与M3体系的固化行为,根据Kissinger方法和Crane方法确定了体系的固化动力学模型及固化动力学参数。结果表明:当MPD的质量分数为30%时,可形成共熔物(M3),熔融温度为36.6℃。TDE-85/M3/PES体系的固化动力学模型符合n级固化反应方程,其表观活化能ΔE为48.56 k J/mol,反应级数n为0.87。此外,利用外推法得到体系起始固化温度Tgel=107℃,恒温固化温度Tcure=137℃,后处理温度Ttreat=159℃。展开更多
The title compound [Ni(acac)2(dadpm)]∞ (acac=acetylacetonate, dadpm=4 ,4′-diaminodiphenylmethane) was synthesized from Ni(acac)2·2H2O with dadpm in DMF. The structure was characterized by elemental analysis, IR...The title compound [Ni(acac)2(dadpm)]∞ (acac=acetylacetonate, dadpm=4 ,4′-diaminodiphenylmethane) was synthesized from Ni(acac)2·2H2O with dadpm in DMF. The structure was characterized by elemental analysis, IR spectroscopy, the rmal analysis and single-crystal X-ray diffraction. X-ray analysis revealed that the central Ni atom is at a center of symmetry, and is octahedrally coordinated by four O atoms from two acac anions and two N atoms from two dadpm ligands. Ea ch dadpm ligand, which has a two-fold axis passing through its methylene C atom, bridges two Ni atoms to form a 1D polymeric chain. Neighboring chains connect v ia H bonding interactions to generate a 2D network. It crystallizes in the monoc linic system, space group P2/c with a=0.556 79(7), b=0.896 06(12), c=2.187 3(3) nm, β=94.942(3)°, V=1.087 2(3) nm3, Z=2, Dc=1.390 g·cm-3, F(000)=480, Mr=455. 17, μ(Mo Kα)=0.924 mm-1, R(F)=0.036 0, wR(F 2)=0.101 0, S=1.013. CCDC: 254565 .展开更多
文摘以间苯二胺(MPD)、4,4′-二氨基二苯基甲烷(DDM)共混制备了一种低共熔点的芳胺固化剂(M3)。通过示差扫描量热分析研究了聚醚砜(PES)增韧环氧树脂(TDE-85)与M3体系的固化行为,根据Kissinger方法和Crane方法确定了体系的固化动力学模型及固化动力学参数。结果表明:当MPD的质量分数为30%时,可形成共熔物(M3),熔融温度为36.6℃。TDE-85/M3/PES体系的固化动力学模型符合n级固化反应方程,其表观活化能ΔE为48.56 k J/mol,反应级数n为0.87。此外,利用外推法得到体系起始固化温度Tgel=107℃,恒温固化温度Tcure=137℃,后处理温度Ttreat=159℃。
文摘The title compound [Ni(acac)2(dadpm)]∞ (acac=acetylacetonate, dadpm=4 ,4′-diaminodiphenylmethane) was synthesized from Ni(acac)2·2H2O with dadpm in DMF. The structure was characterized by elemental analysis, IR spectroscopy, the rmal analysis and single-crystal X-ray diffraction. X-ray analysis revealed that the central Ni atom is at a center of symmetry, and is octahedrally coordinated by four O atoms from two acac anions and two N atoms from two dadpm ligands. Ea ch dadpm ligand, which has a two-fold axis passing through its methylene C atom, bridges two Ni atoms to form a 1D polymeric chain. Neighboring chains connect v ia H bonding interactions to generate a 2D network. It crystallizes in the monoc linic system, space group P2/c with a=0.556 79(7), b=0.896 06(12), c=2.187 3(3) nm, β=94.942(3)°, V=1.087 2(3) nm3, Z=2, Dc=1.390 g·cm-3, F(000)=480, Mr=455. 17, μ(Mo Kα)=0.924 mm-1, R(F)=0.036 0, wR(F 2)=0.101 0, S=1.013. CCDC: 254565 .
