Intercalated rare earth hydrotalcite‐like materials and their application in stabilizers in poly (vinyl chloride)

Du, Guifang; Liu, Zhaogang; Jia, Peijie; Duan, Jinsheng; Ma, Renzhi; Liu, Yonggang; Feng, Fushan; Hu, Yanhong; Wu, Jianjun

doi:10.1002/vnl.21983

Cited by 7 publications

(4 citation statements)

References 20 publications

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“…The reaction process of hydrotalcite‐based thermal stabilizers involved absorbing HCl released during PVC thermal degradation. This process can be divided into two steps as shown in Figure 10 23 . In the first step, HCl and the guest within the LDHs interlayer underwent an ion exchange reaction, leading to the entry of Cl − into the interlayer and the formation of hydrotalcite with Cl − as the guest.…”

Section: Resultsmentioning

confidence: 99%

“…This process can be divided into two steps as shown in Figure 10. 23 In the first step, HCl and the guest within the LDHs interlayer underwent an ion exchange reaction, leading to the entry of Cl À into the interlayer and the formation of hydrotalcite with Cl À as the guest. In the subsequent step, the alkaline metal ions in the main layer of LDHs underwent a neutralization reaction with HCl.…”

Section: Analysis Of Thermal Stabilization Mechanismmentioning

confidence: 99%

“…As a new and environmentally friendly thermal stabilizer, organic acid-intercalated hydrotalcite possesses a broad spectrum of developmental potential and promising applications. 23,24 Cinnamic acid can be uniformly dispersed and stably maintained in hydrotalcite through suitable intercalation modification methods. This paper synthesized and confirmed that CaAl-cinnamate-LDHs serve as high-performance PVC thermal stabilizer, thereby substantially enhancing the thermal stability of PVC.…”

Section: Introductionmentioning

confidence: 99%

“…As a new and environmentally friendly thermal stabilizer, organic acid‐intercalated hydrotalcite possesses a broad spectrum of developmental potential and promising applications 23,24 . Cinnamic acid can be uniformly dispersed and stably maintained in hydrotalcite through suitable intercalation modification methods.…”

Section: Introductionmentioning

confidence: 99%

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Highly efficient and eco‐friendly enhancement of polyvinyl chloride thermal stability: A renewable cinnamate‐intercalated calcium aluminum hydrotalcite stabilizer

Mei,

Jiang,

Zhang

et al. 2024

Vinyl Additive Technology

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With the development of green chemistry, PVC thermal stabilizers should be developed in the direction of non‐toxic, environmental protection, and high efficiency. This study utilized natural Cinnamic acid to successfully synthesize an eco‐friendly and high‐performance cinnamate‐intercalated calcium aluminum hydrotalcite through the coprecipitation method. The structure of CaAl‐cinnamate‐LDHs was analyzed via XRD, IR, SEM, and thermogravimetric analyses. The CaAl‐cinnamate‐LDHs/PVC sample was thoroughly investigated using multiple techniques, including tests, such as oven aging, thermogravimetric analysis, Congo red analysis, and conductivity analysis. Compared with the commercial thermal stabilizers CaSt2/ZnSt2 and CaAl‐CO3‐LDHs, CaAl‐cinnamate‐LDHs demonstrated superior initial whiteness and exceptional long‐term thermal stability, it did not completely blacken until 120 min. Dynamic mechanical analysis showed that the addition of CaAl‐cinnamate‐LDHs could improve the plasticizing performance of PVC. CaAl‐cinnamate‐LDHs also had a synergistic effect with ZnSt2, with a static thermal stabilization time of up to 40.5 min. Through HCl absorption experiments to investigate the thermal stabilization mechanism, the results showed that CaAl‐cinnamate‐LDHs can effectively absorb HCl released during PVC degradation.Highlights By utilizing natural organic Cinnamic acid, Calcium nitrate, and Aluminum nitrate as raw materials, all from a wide range of sources, the reaction process eliminated the need for toxic solvents and a large number of chemicals. The preparation process of CaAl‐cinnamate‐LDHs was simple and the reaction time was short. Comprehensive tests showcased the exceptional long‐term thermal stability of the CaAl‐cinnamate‐LDHs/PVC sample. The addition of CaAl‐cinnamate‐LDHs can improve the plasticizing property of PVC. The mechanism of CaAl‐cinnamate‐LDHs was capable of absorbing HCl released during PVC degradation.

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Section: Resultsmentioning

confidence: 99%

Section: Analysis Of Thermal Stabilization Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Highly efficient and eco‐friendly enhancement of polyvinyl chloride thermal stability: A renewable cinnamate‐intercalated calcium aluminum hydrotalcite stabilizer

Mei,

Jiang,

Zhang

et al. 2024

Vinyl Additive Technology

View full text Add to dashboard Cite

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Enhancing Thermal Stability of PVC Through Organic Acid‐Interlayered Hydrotalcite Modification: Experimental and Computational Analysis

Duan,

Deng,

Liu

et al. 2024

Polymers for Advanced Techs

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This study systematically examines the effects of diphenylphosphinic acid (DPPA) and sarcosine (SAR) intercalation into magnesium aluminum lanthanum hydrotalcite (LDHs) on its structure and thermal stability. Using charge distribution, structural optimization, energy calculations, XRD, FTIR, TEM, and thermal stability tests, the study reveals that DPPA anions, with higher negative charge density, increase the interlayer spacing to 6.08 Å and exhibit a binding energy of −0.7624 eV. SAR anions, with a thinner interlayer spacing of 4.11 Å and a binding energy of −1.603 eV, create a more stable structure. SAR's higher dipole moment (2.827 a.u.) compared to DPPA (2.077 a.u.) enhances electrostatic interactions. Thermal stability tests show SAR‐LDHs and DPPA‐LDHs extend PVC's stability to 53.67 and 56.67 min, respectively. DPPA anions provide superior stability at high temperatures, while SAR anions excel in moderate temperatures. This study offers insights for designing thermally stable composite materials.

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Effect of various saturation levels of hydrogenated nitrile‐butadiene rubber on plasticized polyvinyl chloride performance

Zhang,

Chen,

Zhang

et al. 2024

Vinyl Additive Technology

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Plasticized polyvinyl chloride (PVC) burns easily and generates a lot of smoke during combustion. In order to improve the comprehensive performance of plasticized PVC, hydrogenated nitrile‐butadiene rubber (HNBR) with different degrees of saturation (88%, 94% and 99%) were melt blended with plasticized PVC. Compared to the plasticized PVC without HNBR, the glass transition temperature decreased from −10.6 to −26.0°C, the initiation temperature for thermal degradation increased from 272 to 281°C, the elongation at break enlarged from 316% to 477%, and the permanent set dropped from 72% to 61% when HNBR was added to plasticized PVC at a ratio of 30 parts per hundred parts of resin. However, this resulted in a weakening of tensile strength of the plasticized PVC. Additionally, in the cone calorimetry test, the total smoke production of the PVC/HNBR blends (from 18 to 22 m2) was lower than that of the PVC control (23 m2) and the time to ignition was increased from 26 to 32 s. As a result, PVC/HNBR is expected to gain popularity in the rubber and plastic pipe, wire, and cable sheathing industries.Highlights Plasticized PVC improves thermal stability by melt blending with HNBR. All PVC/HNBR samples have excellent low‐temperature resistance. The addition of HNBR decreases the burning smoke density of plasticized PVC.

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Intercalated rare earth hydrotalcite‐like materials and their application in stabilizers in poly (vinyl chloride)

Cited by 7 publications

References 20 publications

Highly efficient and eco‐friendly enhancement of polyvinyl chloride thermal stability: A renewable cinnamate‐intercalated calcium aluminum hydrotalcite stabilizer

Highly efficient and eco‐friendly enhancement of polyvinyl chloride thermal stability: A renewable cinnamate‐intercalated calcium aluminum hydrotalcite stabilizer

Enhancing Thermal Stability of PVC Through Organic Acid‐Interlayered Hydrotalcite Modification: Experimental and Computational Analysis

Effect of various saturation levels of hydrogenated nitrile‐butadiene rubber on plasticized polyvinyl chloride performance

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