Layered double hydroxides as thermal stabilizers for Poly(vinyl chloride): A review

Guo, Yixuan; Leroux, Fabrice; Tian, Weiliang; Li, Dianqing; Tang, Pinggui; Feng, Yongjun

doi:10.1016/j.clay.2021.106198

Cited by 32 publications

(26 citation statements)

References 85 publications

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“…These properties make PVC suitable for a broad range of applications [6]. The production scale for PVC has increased over the years and this trend will undoubtedly continue into the future [7]. The versatility of PVC can be increased by manipulation of its flexibility to enable its use in applications that require soft polymers via the addition of plasticizers [8].…”

Section: Introductionmentioning

confidence: 99%

FTIR, Weight, and Surface Morphology of Poly(vinyl chloride) Doped with Tin Complexes Containing Aromatic and Heterocyclic Moieties

et al. 2021

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Poly(vinyl chloride) (PVC) is an important synthetic plastic that is produced in large quantities (millions of tons) annually. Additives to PVC are necessary to allow its use in many applications, particularly in harsh conditions. In regard to this, investigation of the synthesis of trimethoprim–tin complexes and their use as PVC additives is reported. Trimethoprim–tin complexes were obtained from the reaction of trimethoprim and tin chlorides using simple procedures. Trimethoprim–tin complexes (0.5% by weight) were added to PVC to produce homogenous mixtures and thin films were made. The effect of ultraviolet irradiation on the surface and properties of the PVC films was investigated. The level of both photodecomposition and photo-oxidation of PVC films containing trimethoprim–tin complexes was observed to be lower than for the blank film. The effectiveness of tin complexes as PVC photostabilizers reflects the aromaticity of the additives. The complex containing three phenyl groups attached to the tin cation showed the most stabilizing effect on PVC. The complex containing two phenyl groups was next, with the one containing butyl substituents resulting in the least stabilization of PVC. A number of mechanisms have been proposed to explain the role of the synthesized complexes in PVC photostabilization.

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Section: Introductionmentioning

confidence: 99%

FTIR, Weight, and Surface Morphology of Poly(vinyl chloride) Doped with Tin Complexes Containing Aromatic and Heterocyclic Moieties

et al. 2021

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“…In order to prevent degradation, adding a thermal stabilizer has been found to be the most effective method. Thermal stabilizers generally inhibit thermal degradation of PVC in two ways: (1) Reacting with or replacing the labile chlorine atoms in PVC chains in tertiary or in allylic structures which prevent further dehydrochlorination. Such thermal stabilizers can inhibit the formation of long polyene sequences and thereby preventing initial color changes of PVC.…”

Section: Introductionmentioning

confidence: 99%

“…Later, the introduction of various additives to plasticize PVC resulted in a more flexible and easier to process material, with a wider range of commercial applications. PVC's physical and chemical properties, including non‐flammability, high strength, environmental resistance, dimensional stability, resistance to strong acids and alkali, excellent mechanical and electrical properties, and good chemical stability, [ 1 ] have ranked PVC first in global plastics use. In the late 1960s, polyethylene replaced PVC.…”

Section: Introductionmentioning

confidence: 99%

Trends and prospects for thermal stabilizers in polyvinyl chloride

Liu

2022

Vinyl Additive Technology

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Thermal stabilizers are essential for polyvinyl chloride (PVC) processing. It is the emergence of thermal stabilizers that made PVC's applications migrate from laboratory to large‐scale industrial use. Herein we overview the development status of some traditional thermal stabilizers including lead salt, metal soaps, and organotin along with relatively newer thermal stabilizers such as organic thermal stabilizers and metal alkoxides. Taking into consideration the high market demand, opportunities for cost‐effective additives for thermal stabilizers are also briefly discussed. Finally, with the recent shift in focus on thermal stabilizer synthesis and their performance characterization but neglecting mechanical property testing and verification, we put forward application prospect of quantum chemical calculation for the development of PVC thermal stabilizers.

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“… 7 Therefore, hydrocalumite has been widely used in industry as a thermal stabilizer, catalyst, and adsorbent. 8 − 11 Hydrocalumite can react with HCl released by thermal degradation of PVC through interlayer anions or main laminate so as to significantly reduce the autocatalytic degradation rate of PVC by HCl. 12 − 14 In recent years, the literature has reports mainly on the effects of preparation methods, intercalation ions, and surface modifiers on the properties of hydrocalumite as a thermal stabilizer for PVC.…”

Section: Introductionmentioning

confidence: 99%

“…Hydrocalumite is a layered double hydroxide composed of Ca 2+ and Al 3+ in the main laminate. , It has a unique layered structure and exchangeable interlayer anions . Therefore, hydrocalumite has been widely used in industry as a thermal stabilizer, catalyst, and adsorbent. − Hydrocalumite can react with HCl released by thermal degradation of PVC through interlayer anions or main laminate so as to significantly reduce the autocatalytic degradation rate of PVC by HCl. − In recent years, the literature has reports mainly on the effects of preparation methods, intercalation ions, and surface modifiers on the properties of hydrocalumite as a thermal stabilizer for PVC. − For example, Yang et al investigated the effect of preparation methods on the performance of hydrocalumite as a thermal stabilizer for PVC. , It was found that the thermal stability of hydrocalumite prepared by the hydrothermal crystallization method with sodium aluminate as an aluminum source is better than that prepared by the traditional coprecipitation method. Zhang et al synthesized hydrocalumite by a clean method using Ca(OH) 2 , Al(OH) 3 , and Na 2 CO 3 as raw materials and found that it shows efficient thermal stability for PVC .…”

Section: Introductionmentioning

confidence: 99%

Bean Dreg–Hydrocalumite Composite as a Highly Efficient Thermal Stabilizer for Poly(vinyl chloride)

Luo

Tang

Yuan³

et al. 2022

ACS Omega

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Bean dreg (BD)–hydrocalumite composites were prepared by a hydrothermal method with BD, Ca(OH) 2 , Al(OH) 3 , and Na 2 CO 3 as raw materials. The samples were characterized by powder X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and N 2 physical adsorption–desorption. Their properties as a thermal stabilizer for poly(vinyl chloride) were tested using a torque rheometer and static thermal aging method. Compared with traditional hydrocalumite, the crystal size of the BD–hydrocalumite composite was relatively small, which made it exhibit good dispersion and better thermal stability for poly(vinyl chloride). In addition, the effects of preparation conditions on the properties of BD–hydrocalumite as a heat stabilizer were also investigated. Under the conditions of n [Ca(OH) 2 /Al(OH) 3 /Na 2 CO 3 ] = 4.4:2:1, a BD dosage of 5%, a crystallization temperature of 90 °C, and 19 h, the prepared BD–hydrocalumite showed the best performance, and the dynamic thermal stability time of poly(vinyl chloride) reached 2149 s.

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Layered double hydroxides as thermal stabilizers for Poly(vinyl chloride): A review

Cited by 32 publications

References 85 publications

FTIR, Weight, and Surface Morphology of Poly(vinyl chloride) Doped with Tin Complexes Containing Aromatic and Heterocyclic Moieties

FTIR, Weight, and Surface Morphology of Poly(vinyl chloride) Doped with Tin Complexes Containing Aromatic and Heterocyclic Moieties

Trends and prospects for thermal stabilizers in polyvinyl chloride

Bean Dreg–Hydrocalumite Composite as a Highly Efficient Thermal Stabilizer for Poly(vinyl chloride)

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