一、对聚丙烯腈进行热处理,是获得具有共轭结构的高聚物的可能途径之一。但到目前为止, 这样所得的产物还很难具有完整的共轭体系。已有的红外光谱研究表明,热处理温度即使高达200℃,聚丙烯腈中的C≡N也难以全部消失。延长时间和升高温度,虽有可能使残余的C≡N基消失,但同时又会引起分子间交联及分子链裂解等不利于形成共轭体系的因素发生。避免以至消除这些影响,以获得较为完整的—(C=N)_n— First, the heat treatment of polyacrylonitrile is one of the possible ways to obtain a polymer with a conjugated structure. However, so far, it has been very difficult to obtain a complete conjugate system for the product so obtained. The existing infrared spectroscopy studies show that the C≡N in polyacrylonitrile hardly disappears even when the heat treatment temperature is as high as 200 ° C. Prolonged and elevated temperatures may cause the residual C≡N groups to disappear, but at the same time they may cause intermolecular cross-linking and molecular chain cleavage, which are unfavorable factors for the formation of conjugated systems. Avoid or even eliminate these effects to obtain a more complete - (C = N) _n-