论文部分内容阅读
在不同酸度下,用化学法合成聚邻甲氧基苯胺的形态分析尚未见详细报导。本文是在不同酸度下用(NH_4)_2S_2O_8引发、40℃恒温聚合四小时,然后水、95％乙醇各洗12小时、真空干燥过夜。将所合成的试样进行了SEM、X—ray和ESR分析,並测定其电导率。我们获得了晶形结构随酸度的变化关系。从SEM观察到,在低酸度时呈蜂窝状,高酸度时为颚粒状(见图1,2)。X—ray分析与之相符(图3、4)。对此现象形成的原因可理解为,酸度较大时,大部分磷甲氧基苯胺是以硫酸盐形式存在,结晶相较强,引发聚合时,速度较快,易形成颗粒状的盐式结构。酸度小时,硫酸盐含量下降,聚合速度相对变小,结晶相随之减弱,则形成蜂窝状形态,聚合物只有少量是盐式结构。盐式结构能显示良好的导电性;
Morphometric analysis of poly-o-methoxyaniline chemically synthesized at different acidities has not been reported in detail. In this paper, different acidity with (NH 4) _2S_2O_8 induced polymerization at 40 ℃ temperature for four hours, then water, 95% ethanol each wash for 12 hours and dried under vacuum overnight. The synthesized samples were subjected to SEM, X-ray and ESR analysis, and their conductivity was measured. We obtained the relationship between crystal structure and acidity. Observed from the SEM, it is honeycomb at low acidity and granular at high acidity (see Figures 1 and 2). The X-ray analysis is consistent (Figure 3, 4). The reason for the formation of this phenomenon can be understood as, when the acidity is large, the majority of phosphorus methoxy aniline exists in the form of sulfate, the crystallization phase is relatively strong, triggering polymerization, the faster, easy to form granular salt structure . When the acidity is low, the sulfate content decreases, the polymerization rate decreases, and the crystalline phase decreases. As a result, honeycomb morphology is formed, and only a small amount of the polymer is salt-type structure. Salt structure can show good conductivity;