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Polyacrylonitrile fiber (PAN) is one of the three major synthetic fiber widely used in life . This article first briefly introduces the preparation, the nature and structure of the PAN . China 's PAN product is relatively simple , and to change this situation , the need for modified PAN fiber , to the preparation of a high-performance , multi-functional PAN products . Produce large amounts of PAN waste in production and life at the same time , the usual approach is difficult to handle these wastes . Consider the economic and environmental factors , and by the modified method , PAN waste recycling is a practical way . In PAN modification method , since the hydrolysis method is simple mild reaction conditions, and thus the most widely used . The paper elaborated the hydrolysis of polyacrylonitrile to affect hydrolysis factors and hydrolysis mechanism , and is summarized in the use of the hydrolyzate . PAN hydrolyzate raw materials can be prepared by a number of high value-added products , its application is closely related to their degree of hydrolysis . To polyacrylonitrile Feisi for raw material to be Alkaline hydrolysis , a series of hydrolyzate is obtained by varying the hydrolysis conditions . And application of infrared spectroscopy , elemental analyzer , raw silk and hydrolyzate to characterize the type and proportion of the group in the product under different hydrolysis conditions . The results prove that the hydrolyzate contains an amide group , the proportion of different product groups obtained in the carboxylic acid salt and unhydrolyzed cyano, different hydrolysis conditions . To better understand the nature of the PAN - hydrolyzate , the application of an Ubbelohde viscometer , spectrophotometer , PH meter were measured by the viscosity of the hydrolyzate , a water - soluble , and the PH value . The extensive application of the PAN hydrolysis product from the method by experimental the absorbent, flocculation performance and lowering Filtrate performance of different polyacrylonitrile hydrolyzate of its excellent performance , the paper was measured , and discusses the hydrolysis conditions , degree of hydrolysis , and these performance relationships. The paper also discusses the influence of other factors on the absorbent, flocculation performance and lowering Filtrate performance ; experimental results show that the product of hydrolysis under different conditions , and their performance is not the same as the absorbing agent , which can be based on the degree of hydrolysis to , flocculant and the filtrate reducer , etc., the degree of hydrolysis (ie, the product of the proportion of the group ) is decided hydrolyzate performance good or bad key .
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