Changes in rheological properties of polyvinyl chloride plastisols with storage time. Issue 37 (17th February 2020)

• Record Type: Journal Article
• Authors: Ji, Yubi; Tang, Anjiang; Yang, Zhao; Luo, Heng; Tan, Hong
• Is Part Of: Journal of applied polymer science. Volume 137:Issue 37(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-02-17
• Subjects: aging -- PVC -- plastisol -- rheology -- viscosity; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.49105
• Languages: English
• ISSNs: 0021-8995

Abstract

Abstract: In this study, the changes in the rheological curves of polyvinyl chloride (PVC) plastisols with increasing storage time and the factors affecting these changes were studied. The results show that with increasing storage time, all the "viscosity–temperature" and "viscosity–time" rheological curves of PVC plastisols exhibit nonnormal distribution change trends, that is, the viscosity first decreases, and then changes from slow increasing to rapid increasing, forming a shoulder peak, reaches to the maximum value and gradually decreases. With increasing storage time, the complex viscosities of PVC plastisols increased generally in the first, the second, and the fourth stages, and the gelation process shortened in the third stage. The first and second stages of the viscosity changes reflect the "time–temperature" equivalence principle of PVC plastisol in suspension stage. However, the maximum viscosity of PVC plastisol corresponding to temperature Tη max does not change with increasing storage time. Abstract :