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Polyacetylene is the most hopeful electrical conductive polymer, which is being exploited to fabricate plastic battery, solar energy cell etc. The catalysts used for the synthesis of high cis-polyacetylene films are mainly Ti(OC_4H_9)_4-AlEt_8 and rare-earth coordination catalysts as well as Co(NO_3)_2-NaBH_4. This paper reports features of acetylene polymerization by novel catalysts composed of transition metal 2-ethyl hexyl phosphonates of the fourth periodic transitional series-Ti, V, Cr, Mn, Fe, Co, Ni and aluminium trialkyls. Except Ni catalyst system, all catalytic systems can promote polymerization of acetylene at room temperature to form a silvery-grey polyacetylene film with rich cis-content and high crystallinity. Under the experimental conditions tested, the catalytic activity of various systems shows the following sequence: Fe>Ti~V>Cr>Mn>Co>Ni The polyacetylene films obtained were characterized. 相似文献
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聚乙炔作为合成的有机金属具有极大的应用潜力。MacDiarmid等发现可用电化学方法对聚乙炔进行可逆掺杂,使其电导率达到金属的水平,而且聚乙炔本身具有一个由微纤维组成的网状结构,有很大的表面积(~60m~2/g),因此适合于作二次电池的电极。人们已在实验室制备了各种类型的聚乙炔电池,它们具有重量轻、能量密度高、功率密度大、可充电等特点,因而具有研究价值。沈之荃等曾应用稀土配合催化剂合成了高含量顺式的、热稳定性较高的和抗氧化稳定性的聚乙炔。本文报道稀土聚乙炔电池及其电化学的研究工作。结果表明:稀土聚乙炔电池的开路电压可达3.5V,短路电流达10mA,平均功率密度达160W/kg,具有进一步开发研究的前景。 相似文献
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聚乙炔是最有希望的导电高分子,目前己在开发应用于制造塑料电池、太阳能电池等。合成聚乙炔膜的主要催化剂有Ti(OC_4H_9)_4-Al(C_2H_5)_3催化剂,稀土络合催化剂及Co(NO_3)_2-NaBH_4等。本文报道新开发的周期表中第22号元素钛至第28号元素Ni的笫四周期过渡金属——Ti,V,Cr,Mn,Fe,Co,Ni的膦酸酯盐与三烷基铝组成的新络合催化剂合成聚乙炔膜的特征。除镍外,这些催化剂都可以使乙炔在室温下聚合生成顺式含量50%以上、高结晶性、有金属光泽的银灰色聚乙炔膜。在实验范围内,各催化体系聚合活性次序如下:Fe>Ti,V>Cr>Mn>Co>Ni,并且表征了所制备的聚乙炔膜,这些新催化剂的开发为合成聚乙炔提供了方便和有利条件。 相似文献
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我们探索了利用钯催化反应合成新型多功能聚合物, 实验结果显示这类反应能与甚多官能团相容, 从而为聚合物化学家提供若干实用之合成方法。 相似文献
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The electrochemical doping of rare earth polyacetylene (PA) employing aqueous electrolyte and the electrical potentials of the rare earth polyacetylene were studied. The half-plastic batteries consisting of doped polyacetylene as cathode and magnesium as anode aS well as aqueous solution as electrolyte were fabricated. Also, the electrical characteristics of the rechargeable battery with doped PA cathode and lithium anode in organic electrolyte were investigated. 相似文献
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