Efficiency and mechanism for the stabilizing action of thiouracil derivatives as novel thermal stabilizers for poly(vinyl chloride) and the synergistic effect with calcium stearate


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Novel thiouracil thermal stabilizers for rigid poly(vinyl chloride) (PVC), 6-methyl-2-thiouraci (6M2TU), 5-methyl-2-thiouraci (5M2TU), and 6-propyl-2-thiouraci (6P2TU) were synthesized successfully via a precipitation method, and characterized with 1H NMR spectra. Investigation of these thiouracil derivatives as thermal stabilizers for poly(vinyl chloride) (PVC) was measured by thermogravimetric analysis (TGA), congo red test, fourier transform infrared (FTIR), and discoloration test. The results show that the thiouracil derivatives have strong ability to replace the labile chlorine atoms in PVC chains, but weak ability to absorb hydrogen chloride. Moreover, PVC stabilized with these thiouracil derivatives and calcium stearate (CaSt2) exhibit greater stabilizing efficiency compared with traditional Ca/Zn stabilizers with the same concentration.

Sobre autores

Mingpei Tang

College of Chemistry and Materials Engineering

Email: 518liujianping@163.com
República Popular da China, Wenzhou

Jinxia Jia

College of Chemistry and Materials Engineering

Email: 518liujianping@163.com
República Popular da China, Wenzhou

Junjie Xue

College of Chemistry and Materials Engineering

Email: 518liujianping@163.com
República Popular da China, Wenzhou

Jianping Liu

College of Chemistry and Materials Engineering

Autor responsável pela correspondência
Email: 518liujianping@163.com
República Popular da China, Wenzhou

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