A facile strategy improving poly(vinyl chloride) stability by introducing unsaturated maleic acid-sorbitol ester and zinc maleic acid-sorbitol ester complex

Wu, Jianyu; Tang, Zilun; Liu, Xiaochun; Lin, Wenjing; Feng, Minghui; Lin, Xiaofeng; Gu, Yuxin; Li, Yong; Yi, Guobin

doi:10.1016/j.polymdegradstab.2020.109343

Cited by 12 publications

(11 citation statements)

References 36 publications

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“…Similar observations of degradation-induced color changes were published in papers where the stabilizing effectiveness of various additives, including maleic acid-sorbitol ester and zinc maleic acid-sorbitol ester complex [17], zinc orotate [36], layered and intercalated hydrotalcite [23], montmorillonite [25], kaolinite [27], and other nanoclays [39], was evaluated using discoloration test. The PVCR samples processed in our laboratory showed significantly higher thermal stability compared with the PVCC sample, which may be seen in the degradation timedependent changes of color (Figure 3).…”

Section: Visual Observation Of Pvc Degradationsupporting

confidence: 73%

“…The temperature higher than PVC softening temperature, i.e., above 150 °C, may induce several chemical reactions, such as dehydrochlorination, oxidation, and degradation. Particularly, due to the dehydrochlorination, the appearing double bonds may lead to color changes of the PVC samples; in this case, the yellowness was followed by dark red and finally by black color, an effect strongly dependent on heating time [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 17 , 18 , 23 , 25 , 26 , 27 , 36 , 37 , 39 ].…”

Section: Resultsmentioning

confidence: 99%

“…[2,3,[9][10][11][12][13][14]. The stabilizing effect of the new types of compounds with a capacity to improve the thermal stability of PVC, such as zinc urate, unsaturated maleic acid-sorbitol ester, and zinc maleic acid-sorbitol ester complex, as well as mannitol stearate ester-based aluminum alkoxide was also reported [15][16][17]. This effect is often synergistic with commercially used thermal stabilizers [15,16] and other additives used in PVC blends, such as cross-linking agents and antioxidants [18].…”

Section: Introductionmentioning

confidence: 99%

“…The Congo red test [ 16 , 17 , 23 , 36 ] and thermal gravimetric analysis [ 14 , 17 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ] were used to determine the thermal stability of PVC in static conditions. The use of Brabender or Haake torque rheometers allows to measure the thermal stability in dynamic conditions [ 16 , 17 , 25 , 37 , 38 ].…”

Section: Introductionmentioning

confidence: 99%

“…The detection of other effects, such as color changes due to hydrogen chloride evaporation [ 17 , 23 , 25 , 26 , 27 , 36 , 37 , 39 ] and/or fluctuations in rheological properties due to degradation of PVC molecular structure [ 37 , 38 ], may also be used as indirect methods to study the degradation progress.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Stability of Nanosilica-Modified Poly(vinyl chloride)

2021

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The thermal stability of PVC with 1 wt % of spherical porous nanosilica, prepared by roll milling at processing time varied from 1 to 20 min, was investigated by means of visual color changes, Congo red, and thermogravimetric tests (TGA and DTG), as a function of rolling time and composition of PVC matrix. The melt flow rate (MFR) measurements were realized to identify the degradation-induced changes of processing properties. A high level of gelation of the PVC matrix for all samples was verified by DSC (differential scanning calorimetry). It was found that the addition of porous nanosilica to absorb a certain volume of HCl, produced by dehydrochlorination reaction, leads to an improvement of thermal stability, an effect observed in a form of minor color changes of the samples, lower evolution of gas hydrogen chloride, and slight changes of the MFR value. It was demonstrated that the TGA measurements are not sufficiently sensible to detect the degradation of PVC at the processing conditions, i.e., at the temperature equal to 220 °C and below this temperature.

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Section: Visual Observation Of Pvc Degradationsupporting

confidence: 73%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal Stability of Nanosilica-Modified Poly(vinyl chloride)

2021

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A new organic zinc thermal stabilizer containing two kinds of anions with excellent thermal stability on polyvinyl chloride by multistep substitution

Shi

Chen

et al. 2023

J of Applied Polymer Sci

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A new kind of highly efficient organic zinc thermal stabilizer for polyvinyl chloride (PVC), zinc arginine stearate [Zn(Arg)(St)], is designed by introducing the arginine and stearate to the same zinc atoms to regulate the binding energy between anions and cation. Gaussian soft is used to calculate the binding energy.The results of Fourier transform infrared spectra, elemental analysis, thermogravimetric analysis, and differential scanning calorimetry show that Zn(Arg)(St) has been successfully synthesized. Zn(Arg)(St) stabilized PVC displays excellent Congo red, static and dynamic thermal stability time, especially the excellent initial whiteness and whiteness retention time. The thermal stability mechanism of Zn(Arg)(St) attributes to the different binding energy between the two anions and zinc cation, which results in Zn(Arg)(St) continuously replacing the unstable chlorine atoms step by step by Arg and St anions. Moreover, the amino group in Arg could complex ZnCl 2 to inhibit the "zinc burning" effect, and the guanidine group could absorb HCl to inhibit the "autocatalytic effect" of HCl. In addition, Zn(Arg) (St) has a remarkable lubrication effect, which also enhances the thermal stability of PVC. Thus, Zn(Arg)(St) is an environmentally friendly thermal stabilizer for PVC with an excellent thermal stability effect. Importantly, this work also proposes a new method to design highly efficient thermal stabilizers for PVC.

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Synergistic effect of Ca/Zn main stabilizer and maltitol auxiliary stabilizer on the thermal stability, mechanical properties, and transparency of poly(vinyl chloride)

Wang,

Zhang,

Dong

et al. 2024

J of Applied Polymer Sci

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Maltitol, a natural compound, offers a potentially eco‐friendly alternative to conventional auxiliary thermal stabilizers. Its auxiliary stabilization effect was studied by discoloration tests, Congo red tests, thermogravimetric analysis, and UV–visible spectroscopy. Additionally, x‐ray photoelectron spectroscopy and discoloration tests were used to study the stabilizing mechanisms of maltitol. Compared to dipentaerythritol, commonly used in the PVC industry, maltitol as an auxiliary stabilizer exhibits better improvement in thermal stability. This improvement is related to its melting point, ability to complex with zinc chloride, and content of hydroxyl groups. Furthermore, the addition of maltitol in PVC not only maintains good transparency of PVC basically unchanged but also improves the mechanical properties. Maltitol, as a natural, eco‐friendly, and efficient auxiliary thermal stabilizer, exhibits a promising application prospect in PVC materials.

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A facile strategy improving poly(vinyl chloride) stability by introducing unsaturated maleic acid-sorbitol ester and zinc maleic acid-sorbitol ester complex

Cited by 12 publications

References 36 publications

Thermal Stability of Nanosilica-Modified Poly(vinyl chloride)

Thermal Stability of Nanosilica-Modified Poly(vinyl chloride)

A new organic zinc thermal stabilizer containing two kinds of anions with excellent thermal stability on polyvinyl chloride by multistep substitution

Synergistic effect of Ca/Zn main stabilizer and maltitol auxiliary stabilizer on the thermal stability, mechanical properties, and transparency of poly(vinyl chloride)

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