Two detection methods for the endpoint of the prepared reaction of N-(oxidiethylene)-2 benzothiazolyl sulfonamide and its analysis

Abstract

In this work, a detection method using pH and ORP for the endpoint determination of the prepared reaction of N-(oxidiethylene)-2-benzothiazolyl sulfonamide (NOBS) was reported, and the properties of NOBS samples were comprehensively investigated. According to the chemical equation of this reaction, the turning point of pH and ORP was used to determine the endpoint of this reaction. Results showed that the purity and yield of experimental NOBS samples increased to 96.4% and 81.7%, respectively. The FTIR and XRD analysis were also used to investigate the chemical structure and crystal absorption peak of NOBS samples. SEM-EDS spectra confirmed the existence of C, N, O and S elements, and there were no other elements in the products. What is more important, the properties of experimental NOBS samples were better than that of contrast samples. Thus, this paper offers an approach to determine the endpoint of the prepared reaction of NOBS.

Keywords

• detection methods
• vulcanization accelerator
• purity
• melting point