Improvement of the processability and thermal stability of poly(vinyl chloride) with 5,6‐diamino‐1,3‐dimethyluracil

Ye, Weihua; Chen, Qinghua; Chen, Zheng; Wen, Zhi; Liao, Zhengfu

doi:10.1002/app.49319

Cited by 9 publications

(10 citation statements)

References 31 publications

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“…Figure 3 is the 1 H NMR characterization of AM, 1 H NMR (400 MHz, deuterated DMSO). As shown in Figure 3: chemical shift δ = 2.50 corresponded to the characteristic peak of the solvent deuterated DMSO; chemical shift δ = 6.62 and δ = 6.50 corresponded to 1 hydrogen on carbon–carbon double bond respectively; The singlet at chemical shift δ = 4.68 corresponded to 1 hydrogen on the imino group attached to the carbonyl group; chemical shift δ = 8.08 corresponded to 1 hydrogen on the carbon–carbon double bond in uracil structure; chemical shifts δ = 3.24 and δ = 3.07 [ 10 ] corresponded to the three hydrogens of the two methyl groups on uracil, respectively. According to the structural formula, the corresponding chemical shift parameters were displayed in the molecular structure of the synthesized target product.…”

Section: Resultsmentioning

confidence: 99%

“…It can be seen from the TG curve that PVC has two stages of thermal weight loss. [ 10 ] The first stage is in the range of 180 ~ 400°C: the hydrogen chloride is released by thermal decomposition, and the conjugated polyene is gradually formed; the second stage is in the range of 400 ~ 550°C: the long carbon skeleton is broken to generate linear or cyclic low molecular weight hydrocarbons, such as polyene, benzene and other structures. Figure 4 is the TG curve of pure PVC, CaSt 2 /AM‐Zn = 2:1, and CaSt 2 /ZnSt 2 = 2:1 system.…”

Section: Resultsmentioning

confidence: 99%

“…The carboxylic acid functional group disappeared to form a salt, which could prove the synthesis of the final product AM-Zn. .07 [10] corresponded to the three hydrogens of the two methyl groups on uracil, respectively. According to the structural formula, the corresponding chemical shift parameters were displayed in the molecular structure of the synthesized target product.…”

Section: Fourier-transform Infrared Spectroscopymentioning

confidence: 99%

“…Among them, nitrogen‐containing thermal stabilizers have shown their strong potential as main stabilizers with their outstanding thermal stabilization effect and good affinity for the environment. [ 10 ] Wang et al [ 11 ] prepared imide epoxidized esters with imide groups and epoxy groups derived from tung oil. The experimental results showed that the composite stabilizer of imide epoxidized ester and calcium/zinc stearate could provide excellent long‐term thermal stability for PVC.…”

Section: Introductionmentioning

confidence: 99%

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Design of nitrogen‐containing organic thermal stabilizer with resistance to “zinc burning” and its application

Cui

Gao

Jiang

et al. 2022

Vinyl Additive Technology

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Using maleic anhydride and 6-amino-1,3-dimethyluracil as raw materials, by adding zinc oxide and introducing metal ions, the aminouracil zinc maleate (AM-Zn) was synthesized. The structure of the product was analyzed by Fourier transform infrared spectroscopy and 1 H NMR spectroscopy. The molecule contains ester group, carbon-carbon double bond, carboxylate and diazo group, which can be used as the main thermal stabilizer for poly(vinyl chloride) (PVC). The thermal stability and excellent resistance to zinc burning of AM-Zn were characterized by Congo red method, thermal aging method, thermal weight loss method, electrical conductivity, and other detection methods. In addition, the compound use of AM-Zn and CaSt 2 could further improve the thermal stability performance, which was excellent compared with the commercially available CaSt 2 /ZnSt 2 . The thermal stabilization effect was the best when CaSt 2 /AM-Zn = 2:1, the initial whiteness could reach 50 min, and it was not completely blackened and aged within 80 min. The static stabilization time was 65 min, and the thermal stabilization time is increased by 40 min compared with CaSt 2 /ZnSt 2 . The thermal stabilization mechanism was analyzed, and the designed and synthesized AM-Zn, a multifunctional molecular structure, had a strong potential as a thermal stabilizer for PVC.aminouracil maleamic acid zinc, anti-zinc burning, plastic additives, PVC thermal stabilizer | INTRODUCTIONPoly(vinyl chloride) (PVC) is a thermoplastic polymer obtained by free radical polymerization of vinyl chloride (VC) monomers. It is one of the top five general-purpose plastics in the world, it has many good physical and chemical properties, such as flame retardant, good water resistance, electrical insulation, acid resistance, alkali resistance, and so forth. [1] With its good performance, PVC has become the most commonly used plastic material in today's society, and is widely used in profiles, pipes, films, sheets, packaging materials, consumer goods. [2] Due to the poor thermal stability of PVC resin materials, aging, discoloration, and deformation will occur under high temperature processing conditions. The degradation of PVC will deteriorate the physical and chemical properties and mechanical properties of its products.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Fourier-transform Infrared Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design of nitrogen‐containing organic thermal stabilizer with resistance to “zinc burning” and its application

Cui

Gao

Jiang

et al. 2022

Vinyl Additive Technology

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“…The thermal stabilizer used in industry now generally consists of a variety of thermal stabilizers. Under the synergistic effect of the main thermal stabilizer, the auxiliary thermal stabilizer has the advantages of small dosage and high efficiency, and has attracted much attention in recent years 9,10 …”

Section: Introductionmentioning

confidence: 99%

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

Gao

Jiang

Zhang

et al. 2021

J of Applied Polymer Sci

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Diethylene glycol and maleic anhydride are used as raw materials to prepare bismaleic acid dibasic acid without catalyst. This intermediate product reacts with pentaerythritol (PER) to obtain bismaleate pentaerythritol (MDPP) as an auxiliary heat stabilizer. The structure of the product was verified by Fourier infrared test and hydrogen nuclear magnetic spectrum analysis. The ether bond, ester group, carbon–carbon double bond, polyol, and other characteristic structures contained in the molecule can improve thermal stability. Therefore, it can be used as an auxiliary heat stabilizer for PVC and used in combination with the main heat stabilizer. In order to verify the thermal stability performance and further analyze the thermal stability mechanism, testing methods such as thermal aging, Congo red, thermal weight loss, and electrical conductivity were adopted. The results show that when MDPP is added together with calcium/zinc stearate, the thermal stability of PVC is the best. The initial whiteness can reach 40 min, and the static stabilization time is 65 min, which is 15 min higher than the PVC sample with PER and calcium/zinc stearate. It can be seen that MDPP has greatly improved performance compared with the commercial auxiliary heat stabilizer PER.

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Preparation and performance of PVC long‐term heat stabilizer based on the synergistic effect of uracil and metal complexes

Zhang

Xia

Song

et al. 2022

Vinyl Additive Technology

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In order to improve the deficiency of traditional polyvinyl chloride (PVC) heat stabilizer, triazole-based zinc-containing complex (abbreviated as [Zn(ttr) (OAc)]) with good compatibility with PVC and a strong ability to absorb HCl was prepared in this paper, which was characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscope (SEM) and thermogravimetric analysis (TGA). PVC sheets were prepared by mixing PVC with composite heat stabilizer (DAJ) composed of [Zn(ttr)(OAc)] and 1,3-dimethyl-6-aminouracil (DAU). Different kinds and amounts of common auxiliary heat stabilizers were selected and added to the DAJ system to study the effect of thermally stable system on PVC by Congo red test, Discoloration test, Dynamic thermal stability test, SEM, TGA and Transmittance test and the relevant mechanism was explored. The PVC sheets with DAJ blended by 1.2 phr DAU and 0.8 phr [Zn(ttr)(OAc)] showed relatively excellent coloring properties, long-term thermal stability, and high light transmittance. Compared with dibenzoylmethane (DBM), 0.5 phr sorbitol and 1.5 phr epoxy soybean oil (ESBO)/Antioxidant 168 showed good synergistic effect with DAJ. Due to the polyhydroxy nature of sorbitol, the thermal stability of PVC was significantly improved, and the transmittance of PVC benefited from the similar miscibility of ESBO long chain. This was also confirmed by TGA and SEM of PVC sheet.

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Improvement of the processability and thermal stability of poly(vinyl chloride) with 5,6‐diamino‐1,3‐dimethyluracil

Cited by 9 publications

References 31 publications

Design of nitrogen‐containing organic thermal stabilizer with resistance to “zinc burning” and its application

Design of nitrogen‐containing organic thermal stabilizer with resistance to “zinc burning” and its application

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

Preparation and performance of PVC long‐term heat stabilizer based on the synergistic effect of uracil and metal complexes

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