Synthesis of bismaleate pentaerythritol ester and its application as <scp>PVC</scp> auxiliary heat stabilizer

Gao, Xinxin; Jiang, Pingping; Zhang, Zheming; Li, Zhenhua; Li, Yuchao; Zhang, Pingbo

doi:10.1002/app.51820

Cited by 9 publications

(5 citation statements)

References 10 publications

(10 reference statements)

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“…1 H-NMR spectra provide more detailed information about the chemical environ of the H atom and, thus, provide an insight into the hydrogen bonding interactio molecules. Increasing the strength of the hydrogen bonding interactions can induce c ical shifts toward downfield because the protons are more strongly deshielded w stronger hydrogen bonds participate [43]. Figure 6 shows the perature was adjusted to 298 K to produce phase separation to concentrate amino acids in one phase to achieve extraction.…”

Section: Resultsmentioning

confidence: 99%

Ionic-Liquid-Based Aqueous Two-Phase Systems Induced by Intra- and Intermolecular Hydrogen Bonds

Gao²,

Zheng³

et al. 2022

Molecules

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In recent years, aqueous two-phase systems (ATPSs) have been widely used in different fields and have become an increasingly attractive subject due to their application in the separation and purification of biomolecules. In this work, the aqueous phase behavior of ionic liquids (ILs) was modulated by changing the cis-trans structure of the anion in ILs. With the same tetra-butyl-phosphine as the cation, the cis-anion exhibited upper critical solution temperature (UCST) phenomena. In contrast, the trans-anion exhibited lower critical solution temperature (LCST) phenomena. The proposed mechanism shows that the main factors responsible for these phenomena include variations in the dissociation degree with temperature and the steric hindrance of the ILs. This phase behavior combines the chemical equilibrium in a solution with the microstructure of the molecule and is useful for constructing new chemical dynamic equilibria in ATPS. As an example of its application, aqueous solutions of both ILs can be used for the efficient separation and extraction of specific amino acids. The two ATPS systems reported in this work highlight a simple, effective, and environmentally friendly method for separating small biological molecules.

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Section: Resultsmentioning

confidence: 99%

Ionic-Liquid-Based Aqueous Two-Phase Systems Induced by Intra- and Intermolecular Hydrogen Bonds

Gao²,

Zheng³

et al. 2022

Molecules

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“…The mixture was uniformly spread onto an elongated glass plate, resulting in a film of approximately 1 mm thickness. The film was then subjected to heating in a 120 °C oven for about 30 min to promote plasticization and shaping 25 . The formulation of PVC samples was shown in Table 1.…”

Section: Methods Employed In the Experimentsmentioning

confidence: 99%

“…The film was then subjected to heating in a 120 C oven for about 30 min to promote plasticization and shaping. 25 The formulation of PVC samples was shown in Table 1.…”

Section: Fabrication Of Pvc Samplesmentioning

confidence: 99%

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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“…The organic additives such as P-GT 4 and P-AZ 3 may also decompose at this temperature. The second stage of weight loss within 400°C-600°C likely results from the cyclization of conjugated polyene sequence, which leads to the formation of aromatic compounds [34]. Moreover, the carbonization of organic compounds at such a high temperature is also responsible for weight loss at this stage.…”

Section: Thermal Stabilizing Behavior Evaluated By Tga Analysismentioning

confidence: 99%

Synergistic Modification of PVC with Nitrogen-Containing Heterocycle and Tung-Oil Based Derivative for Enhanced Heat Stabilization and Plasticization Behavior

Wang¹,

Fan²,

Bu³

et al. 2023

Journal of Renewable Materials

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The additives present in polyvinyl chloride (PVC) materials are the major source of organic by-products during PVC degradation. The thermal stabilizer and plasticizer are the main additives that endow PVC with the required properties during its processing. However, these two additives easily migrate when samples are obtained by physical mixing of the additives with PVC. This causes the reduction of PVC sample efficacy and the increase in the formation of organic by-products in the radiolysis process. In this work, two kinds of grafted PVC samples (tungoil derivative grafted PVC and Atz grafted PVC, abbreviated as P-GT 4 and P-AZ 3 ) were synthesized by chemical grafting of 3-amino-1,2,4-triazole (Atz) and tung-oil derivative on PVC, respectively. These two PVC samples were then blended at different mass ratios to obtain hybrid PVC materials with excellent plasticization, thermal stability and migration resistance ability. Differential scanning calorimetry (DSC), discoloration, Congo red test and thermogravimetric analysis (TGA) showed that when the mass ratio of P-GT 4 to P-AZ 3 in the mixed PVC resin was 1:3, the resulting P 1:3 -GT 4 -AZ 3 (P4) presented the best plasticization and thermal stability. The kinetics of thermal decomposition showed that the activation energy of P4 was much higher than that of the reference material [PVC/DOTP/CaSt 2 /ZnSt 2 , PVC/CZ41 for short] at mass loss α = 20% and 80%. In addition, the leaching test showed that P4 material possessed excellent migration resistance ability.

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Synthesis of bismaleate pentaerythritol ester and its application as PVC auxiliary heat stabilizer

Cited by 9 publications

References 10 publications

Ionic-Liquid-Based Aqueous Two-Phase Systems Induced by Intra- and Intermolecular Hydrogen Bonds

Ionic-Liquid-Based Aqueous Two-Phase Systems Induced by Intra- and Intermolecular Hydrogen Bonds

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

Synergistic Modification of PVC with Nitrogen-Containing Heterocycle and Tung-Oil Based Derivative for Enhanced Heat Stabilization and Plasticization Behavior

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