氨化亚铜预处理聚丙烯腈纤维热稳定化作用的研究

A STUDY ON THE THERMAL STABILIZATION OF POLYACR- YLONITRILE FIBRES PRETREATED WITH CUPROUS CHLORIDE

本文用原位红外光谱法考察了用氯化亚铜(GuCl)预处理过的和未处理的聚丙烯睛(PAN)试样在空气和氮气条件下热稳定化过程。发现反应体系中的环化速率大于脱氢速率,环化反应在240—300℃间进行得最激烈。处理过的试样显示出芳香度发展得快,结构更加稳定。PAN结构中所结合的CuCl在空气中可提高环化速率约1.4倍(260℃),在氮气中可提高坏化速率约43％(340℃)。

In this paper the process of the thermal stabilization of polyacrylonitrile (PAN) fibres pretreated with cuprous Chloride (CuCl) have been studied in air and nitrogen atmosphere by in-situ infrared spectroscopic method. From the results is was found that the rate of cyclita-tion proceeded furiously at 240-300℃ region and is much faster than the rate of dehydro-genation. It may be inferred that for CuCl treated PAN fibres the aromatization of the structure de veloped extensively and the formed structure more stabilized. It was shown that the-incorporation of Cu Cl in the PAN structure enhances the rate of cyclization by about 1.4 time in air (260℃) and by about 43% in nitrogen (340℃).