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首页> 外文期刊>Journal of Applied Polymer Science >The Use of Positron Annihilation Lifetime Technique to Study the Effect of Doping Metal Salts on Polyhydroxamic Acid Polymers
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The Use of Positron Annihilation Lifetime Technique to Study the Effect of Doping Metal Salts on Polyhydroxamic Acid Polymers

机译：正电子An没寿命技术研究掺杂金属盐对聚异羟肟酸聚合物的影响

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摘要

Polyhydroxamic acid (PHA) from polymethacrylamide (PMAA) was pre-pared. Chromium chloride (CrCla) and ferric chloride (FeCl_3) salts were added to the polymer in order to increase its electrical conductivity, i.e., the dopants help produce semiconducting properties. Tpe positron annihilation lifetime technique spectroscopy (PALS) was used to study the changes in the free volume as a function of FeCla and CrCl_3 concentrations. ortho-Positronium lifetime components were used to estimate the free volume parameters. It was found that the hole size and the total free volume fraction decreased with FeCla concentration. On the other hand, the hole size increased slightly with CrCl_3 concentration and then decreased, while the total free volume fraction increased continuously. The free volume distributions were determined from ortho-positronium distributions. The electric conductivity as a function of FeCla and CrCl_3 concentrations showed fluctuation behavior and showed a continuous increase with the increase in temperature. The correlation between positron annihilation pa- rameters and electric conductivity were discussed.
机译：由聚甲基丙烯酰胺（PMAA）制备了聚异羟肟酸（PHA）。将氯化铬（CrCla）和氯化铁（FeCl_3）盐添加到聚合物中，以增加其导电性，即，掺杂剂有助于产生半导体性能。 Tpe正电子an没寿命技术光谱（PALS）用于研究自由体积随FeCla和CrCl_3浓度的变化。正交正电子寿命组件用于估计自由体积参数。发现孔尺寸和总自由体积分数随FeCla浓度而降低。另一方面，孔尺寸随CrCl_3浓度的增加而略有增加，然后减小，而总自由体积分数则连续增加。自由体积分布由正-正电子分布确定。电导率随FeCla和CrCl_3浓度的变化表现出波动性，并随温度的升高而持续增加。讨论了正电子an没参数与电导率之间的关系。

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