Work

Synthesis and Performance Evaluation of Novel Nitrogen‐Containing PVC Heat Stabilizer Oligo‐Uracil

Year: 2025

Type: article

Abstract: Two novel nitrogen‐containing organic heat stabilizers for PVC, 1,5‐triuracil (5‐SU) and 1,6‐triuracil (6‐SU), were successfully synthesized from 5‐chlorouracil and 6‐chlorouracil, respectively, by oligomerization reaction. The molecular structures were characterized by FTIR and NMR techniques. Then, the thermal stability performance of 5‐SU and 6‐SU was investigated in detail by Congo red test, thermogravimetric analysis, thermal aging test, conductivity test, and torque rheology test. The results demonstrate that both 5‐SU and 6‐SU have much superior thermal stability compared to those in the literature, including the commercial calcium–zinc heat stabilizers. The thermal stability of 6‐SU is better than that of 5‐SU. The thermal stabilization time of 6‐SU is measured to be not less than 200 min. However, there is an antagonistic rather than a synergistic effect between 5‐SU/6‐SU and CaSt 2 . Both 5‐SU and 6‐SU have certain UV‐absorbing ability to improve the UV weathering resistance of PVC. The results of optical density measurements show that the PVC material with 5‐SU/6‐SU is able to inhibit the growth of S. aureus . When the bacteria are incubated up to 12 h, the inhibition rate of 5‐SU is 9%, while that of 6‐SU is 33.3%. The stabilizing effect of 5‐SU and 6‐SU on PVC is achieved by substituting the defective sites in PVC material.

Source: Journal of Chemistry

DOI: 10.1155/joch/4561804

Authors: Xinwu Zhuang, Shuguang Zhang

Institution: Shandong University of Technology

Language: English

Topic: Polymer Science and PVC

Subfield: Polymers and Plastics

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,160

Funders: Natural Science Foundation of Shandong Province, Shandong University of Technology, Key Technology Research and Development Program of Shandong