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以丙酮为溶胀溶剂,分别在丙酮中加入一定量的CuSO_4和AgNO_3溶液,并改变AgNO_3溶液的浓度。研究了溶剂和Cu~(++)、Ag~+向无定形PET(聚对苯二甲酸乙二醇酯)中渗入的扩散过程。同时,也研究了金属离子和溶剂诱发的结晶对PET电导的影响机理。此外,对渗入Cu~(++)和Ag~+后的试样进行了DSC研究,试验结果表明:通过溶剂溶胀扩散的途径,能够把Cu~(++)和Ag~+渗入PET中,并使试样的电导率大幅度提高。若改变金属离子的浓度,可以使电导率在好几个数量级内变化,由此可见,通过溶剂溶胀扩散的途径向PET中掺入导电离子的方法是行之有效的。DSC谱图表明,加入Cu~(++)和Ag~+在结晶行为上有差异。
With acetone as the swelling solvent, a certain amount of CuSO_4 and AgNO_3 solutions were respectively added to acetone, and the concentration of AgNO_3 solution was changed. The diffusion process of solvent and Cu ~ (++), Ag ~ + into amorphous PET (polyethylene terephthalate) was studied. In the meantime, the influence mechanism of metal ions and solvent-induced crystallization on PET conductance was also studied. In addition, the DSC study of the samples infiltrated with Cu ~ (++) and Ag ~ + showed that the Cu ~ (++) and Ag ~ + can penetrate into the PET through the way of solvent swelling and diffusion, And the conductivity of the sample greatly improved. If the concentration of metal ions is changed, the conductivity can be varied over several orders of magnitude. Thus, it is evident that the incorporation of conductive ions into PET by the solvent-swept diffusion route is effective. The DSC spectra showed that the addition of Cu ~ (++) and Ag ~ + have different crystallization behavior.