Development and Investigation of Lanthanum Sulfadiazine with Calcium Stearate and Epoxidised Soyabean Oil as Complex Thermal Stabilizers for Stabilizing Poly(vinyl chloride)
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Synthesis and Characterization of LaSD
2.3. Preparation of PVC Samples
2.4. Evaluation of Stabilizing Efficiency
2.4.1. Congo Red Test
2.4.2. Discoloration Test
2.4.3. Analysis of Thermal Degradation
2.4.4. Study of the Mechanism of LaSD as PVC Thermal Stabilizer
2.5. UV-Vis Spectrum
3. Results
3.1. Characterization of LaSD
3.2. Effects of Different Thermal Stabilizers on Stabilizing PVC
3.3. Study of the Thermal Stability Mechanism of LaSD in PVC
3.4. Influence of LaSD/ESBO on Stabilizing PVC
3.5. Influence of LaSD/ESBO/CaSt2 on Stabilizing PVC
3.6. Thermal Decomposition Kinetics
3.7. UV-Vis Spectrum Test
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Element | La | C | H | N | S | Molecular formula |
---|---|---|---|---|---|---|
Theory | 15.69 | 40.63 | 3.05 | 18.96 | 10.84 | La(C10H9N4O2S)3 |
Reality | 15.21 | 40.01 | 3.34 | 18.33 | 10.43 | La(C10H9N4O2S)3 |
Materials | T5% (oC) | T10% (°C) | Tf (°C) | Wf (%) |
---|---|---|---|---|
PVC | 242.1 | 256.8 | 288.3 | 70.5 |
PVC/LaSD (1.0 wt %) | 244.1 | 258.6 | 291.2 | 66.9 |
PVC/LaSD (3.0 wt %) | 245.3 | 259.2 | 292.9 | 65.7 |
PVC/LaSD (5.0 wt %) | 246.6 | 261.1 | 294.5 | 61.9 |
Sample | β (K/ min) | Tmax/ K | Ea/ (kJ/ mol) |
---|---|---|---|
PVC/LaSD | 10 | 564.1 | 106.6 |
15 | 574.3 | ||
20 | 579.5 | ||
25 | 586.2 | ||
PVC/LaSD/ESBO | 10 | 568.1 | 112.1 |
15 | 577.3 | ||
20 | 581.6 | ||
25 | 589.7 | ||
PVC/LaSD/ESBO/CaSt2 | 10 | 566.6 | 119.9 |
15 | 575.3 | ||
20 | 581.3 | ||
25 | 586.2 |
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Ye, Q.; Ma, X.; Li, B.; Jin, Z.; Xu, Y.; Fang, C.; Zhou, X.; Ge, Y.; Ye, F. Development and Investigation of Lanthanum Sulfadiazine with Calcium Stearate and Epoxidised Soyabean Oil as Complex Thermal Stabilizers for Stabilizing Poly(vinyl chloride). Polymers 2019, 11, 531. https://doi.org/10.3390/polym11030531
Ye Q, Ma X, Li B, Jin Z, Xu Y, Fang C, Zhou X, Ge Y, Ye F. Development and Investigation of Lanthanum Sulfadiazine with Calcium Stearate and Epoxidised Soyabean Oil as Complex Thermal Stabilizers for Stabilizing Poly(vinyl chloride). Polymers. 2019; 11(3):531. https://doi.org/10.3390/polym11030531
Chicago/Turabian StyleYe, Qiufeng, Xiaotao Ma, Bobin Li, Zhe Jin, Yingying Xu, Cheng Fang, Xiaoya Zhou, Yeqian Ge, and Feng Ye. 2019. "Development and Investigation of Lanthanum Sulfadiazine with Calcium Stearate and Epoxidised Soyabean Oil as Complex Thermal Stabilizers for Stabilizing Poly(vinyl chloride)" Polymers 11, no. 3: 531. https://doi.org/10.3390/polym11030531