Study on Application and Mechanism of Alkali Sulfadiazine Neodymium as PVC Heat Stabilizer

Abstract:

In this paper, the alkali sulfadiazine neodymium (NdSD) was prepared from sulfadiazine and neodymium nitrate hexahydrate under alkaline conditions, and used as a heat stabilizer on PVC. The structure of NdSD was characterized by elemental analysis and infrared spectrum. The results show that the molecular formula of NdSD is Nd (SD)₂·OH·H₂O. The thermal degradation process of NdSD at 25-800°C was characterized by thermogravimetric analysis. The results show that the decomposition temperature of NdSD is higher than 200°C, which is suitable for PVC thermal stabilizer. The thermal stabilizer time of PVC by NdSD was characterized by static Congo red method. The results showed that the thermal stabilizer time of PVC increased from 2.7min to 23.2 min after adding NdSD. The discoloration effect of NdSD on PVC was characterized by oven discoloration method. The results indicate that PVC samples added with NdSD show better effect than other heat stabilizers. By means of silver nitrate solution method and Fourier transform infrared spectroscopy, it was proved that sulfadiazine neodymium can absorb and react with HCl, and further proposed a possible mechanism of NdSD stabilization of PVC.

• Periodical: Advanced Engineering Forum (Volume 49)
• Pages: 1-8
• DOI: https://doi.org/10.4028/p-k9nr19
• Online since: May 2023
• Authors: Feng Ye, Kang Jie Guo, Sha Feng Lu, Xiao Dong Wang, Guo Yan Shen, Zhi Cai Shang, Bo Bin Li, Qiu Feng Ye*
• Keywords: Heat Stabilizer, Mechanism, Neodymium, Polyvinyl Chloride, Sulfadiazine

References

[1] B. Wang, Y.H. Lu, Y.W. Lu, Organic Tin, Calcium-Zinc and Titanium Composites as Reinforcing Agents and Its Effects on the Thermal Stability of Polyvinyl Chloride, J. Therm. Anal. Calorim. 142 ( 2020) 671-683.

DOI: 10.1007/s10973-020-09767-9

[2] Y.X. Guo, F. Leroux, W.L. Tian, D.Q. Li, P.G. Tang, Y.J. Feng, Layered Double Hydroxides as Thermal Stabilizers for Poly(Vinyl Chloride): A Review, Appl. Clay. Sci. 211 (2021).DOI10.1016/ j.clay.2021.106198

DOI: 10.1016/j.clay.2021.106198

[3] Y.Q. Shi, S.Y. Lu, B.A. Ma, S. Chen, M. Ma, H.W. He, X. Wang, A New Method for Designing Bis-Uracil Derivatives as Highly Efficient and Transparent PVC Thermal Stabilizer with Excellent Migration Resistance, Polym. Degrad. Stab. 186 (2021)109504.

DOI: 10.1016/j.polymdegradstab.2021.109504

[4] H.A. Shnawa, Characterization of Processing, Rheological and Dynamic Mechanical Thermal Properties of PVC Stabilized with Polyphenol-Based Thermal Stabilizer, J. Therm. Anal. Calorim. 139 (2020) 125-135.

DOI: 10.1007/s10973-019-08365-8

[5] Z.M. Fu, Z.H. Yang, Y. Rong, L. Deng, J. Wu, A Zinc Schiff Base Complex as High-Efficiency Stabilizer for Flexible Poly(Vinyl Chloride) against Thermal Degradation, J. Vinyl. Addit. Techn. 27 (2021) 367-375.

DOI: 10.1002/vnl.21812

[6] R. Kalouskova, M. Novotna, Z. Vymazal, Investigation of thermal stabilization of poly(vinyl chloride) by lead stearate and its combination with synthetic hydrotalcite, Polym. Degrad. Stab. 85 (2004) 903-909.

DOI: 10.1016/j.polymdegradstab.2004.04.008

[7] R. Shariatmadari, M. Kalaee, R. Khajavi, Z. Shariatinia, Effect of Zeolitic Metal-Organic Framework on Thermal, Mechanical, and Electrical Properties of Ca/Zn-Stabilized Polyvinyl Chloride, J. Vinyl. Addit. Techn. 27 (2021) 497-507.

DOI: 10.1002/vnl.21822

[8] C. Zeddam, N. Belhaneche-Bensemra, Application of FT-IR spectroscopy to the specific migration study of an organotin heat stabilizer from rigid poly(vinyl chloride) into food simulants, Polimery. 56 (2011) 657-661.

DOI: 10.14314/polimery.2011.657

[9] W.H. Ye, Q.H. Chen, Z. Chen, Z. Wen, Z.F. Liao, Improvement of the Processability and Thermal Stability of Poly(Vinyl Chloride) with 5,6-Diamino-1,3-Dimethyluracil, J. Appl. Polym. Sci. 137 (2020) e49319.

DOI: 10.1002/app.49319

[10] Z.G. Liu, J.G. Zhao, M. Li, Y.H. Hu, J.X. Wu, F.S. Feng, Enhanced the Thermal Stability of Polyvinyl Chloride Via Synergistic Effects of Basic Lanthanum Tartrate with Zinc Stearate and Pentaerythritol, Polym. Sci. Ser. B. 63 (2021) 182-190.

DOI: 10.1134/s156009042102007x

[11] J.M. Feng, Z.G. Liu, J.W. Fan, M. Li, Y.H. Hu, W. Hao, Study on lanthanum 2-aminoterephth-alate as heat stabilizer for PVC, Modern Chemical Industry. 40 (2020) 97-102.

[12] D.L. Li, S. Liu, H.X. Zhang, G.X. Su, C.W. Liu, Preparation of Lanthanum Magnesium Hydrotalcite and Effect on Thermal Stability of PVC, Plastic. 48 (2019) 28-31.

[13] D.L. Li, S. Liu, L.Q. Gu, G.H. Li, Y. Ding, L.M. Dong, Preparation of Rare Earth Complexes with Curcumin and Their Stabilization for PVC, Polym. Degrad. Stab. 184 (2021)109480.

DOI: 10.1016/j.polymdegradstab.2020.109480

[14] F. Ye, Q.F. Ye, X.J. Guo, H.H. Zhan, C. Fang, D.F. Hu, Q.J. Mao, Investigation of lanthanum trioxypurine with zinc stearate and pentaerythritol as complex thermal stabilizers for poly(vinyl chloride), J. Vinyl. Addit. Techn. 25 (2019) 347-358.

DOI: 10.1002/vnl.21702

[15] I. Ameen, A.K. Tripathi, A. Siddiqui, G. Kapil, S.S. Pandey, U.N. Tripathi, Synthesis, characterizations and photo-physical properties of novel lanthanum(III) complexes, J. Taibah. Univ. Sci. 12 (2018) 796-808.

DOI: 10.1080/16583655.2018.1516028

[16] Z.G. Liu, J.W. Fan, J.M. Feng, M. Li, Y.H. Hu, W. Hao, F.S. Feng, Study on the Use of Rare Earth Stabilizer as Poly(Vinyl Chloride) Stabilizer, J. Vinyl. Addit. Techn. 26 (2020) 536-47.

DOI: 10.1002/vnl.21768