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随着互穿聚合物网络(IPN)的发展,出现了无机/有机杂化IPN,调整两组分或多组分互穿程度控制材料的结构、形态与性能,可使材料具有较宽的适用范围.此类材料具有高模量、高韧性,易成型加工. 相似文献
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An attempt was made to prepare nanographite with uniform size by pyrolysis of 4-methyl pyridine (MPy), which is the structure-directing agent for the formation of GaPO4-LTA single crystals, in the GaPO4-LTA framework at 760 ℃. The as-prepared nanographite has been examined by Raman spectroscopy, transmission electron microscopy (TEM), electron spin resonance (ESR) and magnetization characterizations. The TEM image shows that the size of individual nanographite particles is about 7 nm, and it is proved that there are spins of sp^2-type (π-type) radical electrons localized on the zigzag edge sites of the nanographite. The magnetic susceptibility of the nanographite shows crossover from a high-temperature diamagnetic to a low-temperature paramagnetic behavior, in good agreement with the theoretical expectation. 相似文献
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以γ-甲基吡啶(mPy)为模板剂合成了具有A型分子筛骨架结构的磷酸镓(GaPO4-LTA)单晶,并研究了mPy在GaPO4-LTA超笼内的高温热解反应.mPy在GaPO4-LTA笼中热解后形成稠环芳烃类物质PAHs(Polycyclicaromatichydrocarbons).这些PAHs物质的种类与升温速度和终止温度密切相关.在GaPO4-LTA笼中生成的PAHs可望成为合成富勒烯的前驱体. 相似文献
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钼磷酸铵及钼磷酸掺杂的聚合物电解质 总被引:2,自引:0,他引:2
以聚氧乙烯(PEO)为基质,掺杂适量的钼磷酸铵或钼磷酸,制备出PEO-(NH4)3PMo12O40及PEO-H3PMo12O40质子导电聚合物电解质膜,测定了其电导率.讨论了加入(NH4)3PMo12O40及H3PMo12O40对PEO构型及Keggin阴离子的影响,分析了PEO-(NH4)3PMo12O40及PEO-H3PMo12O40复合膜质子电导提高的原因.其中PEO-(NH4)3PMo12O40质子导电聚合物电解质复合膜的室温电导率最高可达1.4×10-3S/cm. 相似文献
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