Journal of Vinyl & Additive Technology最新文献

{"title":"Plasticized polyvinyl chloride/melamine-cyanurate modified Mg(OH)2@bentonite nanocomposites; mechanical, thermal, and flame retardant properties","authors":"Mohsen Hajibeygi,&nbsp;Faezeh Soltani,&nbsp;Meisam Shabanian,&nbsp;Mahdiye Maleki,&nbsp;Hossein Ali Khonakdar,&nbsp;Benjamin Kruppke","doi":"10.1002/vnl.22033","DOIUrl":"10.1002/vnl.22033","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>In this work, a strategy was used to combine Mg(OH)₂ nanoparticles (MDH), the bentonite nano-sheets, and melamine cyanurate (MC) to prepare dioctyl phthalate (DOP) plasticized polyvinyl chloride (PVC) nanocomposites with increased thermal stability, Limiting Oxygen Index (LOI), and tensile strength as well as reduced total heat release. To prepare MC-modified Mg(OH)₂@bentonite nanohybrid (MMHB), MDH was installed on the calcined bentonite and consequently modified with MC. The nanocomposite thin films were prepared from plasticized-PVC and MMHB using the solvent casting method. It was found that the combination of MDH and the bentonite nano-sheets in the presence of MC could improve the PVC properties. Thermogravimetric analysis (TGA) in both N₂ and air atmospheres, indicated that the thermal stability of PVC was enhanced via adding MMHB, which was evident by the increased thermal decomposition temperature. The microscale combustion calorimetry (MCC) results of the PVC nanocomposites with 5% and 8% by mass of MMHB revealed that an optimal isolating layer is formed, which increased flame retardant properties. The PVC matrix nanocomposite containing 8% by mass of MMHB with LOI value of 33.4% exhibited high flame retardancy. Moreover, the tensile strength and elastic modulus of the sample containing 5% by mass of MMHB increased by 65.5% and 55.2% compared to those of pristine PVC, respectively.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>A nanohybrid was prepared from Mg(OH)₂ (MDH) and calcined bentonite.</li>\u0000 \u0000 <li>Preparation of melamine cyanurate (MC).</li>\u0000 \u0000 <li>Preparation of MC-modified MDH@bentonite nanohybrid (MMHB).</li>\u0000 \u0000 <li>Effects of MMHB on thermal stability and flame retardancy of plasticized PVC.</li>\u0000 \u0000 <li>The efficient flame retardancy effect of the additive on plasticized PVC.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46544566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of a novel chitosan-based macromolecular antioxidant and its effects on the anti-aging properties of styrene-butadiene rubber/silica composites","authors":"Pan Ding,&nbsp;Xiaojiang Xie,&nbsp;Jingwei He,&nbsp;Yongkun Zou,&nbsp;Fang Liu","doi":"10.1002/vnl.22031","DOIUrl":"10.1002/vnl.22031","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>In this work, a novel chitosan-based macromolecular rubber antioxidant (denoted as COS-AO) was successfully synthesized by using chitosan (COS) and 3-(3,5-di-tert-butyl4-hydroxyphenyl) propionic acid (antioxidant, AO) via esterification reaction. The FTIR, ¹H NMR, ¹³C NMR, and elemental analysis measurements were used to confirm the structure of COS-AO. The performance of COS-AO as a macromolecular antioxidant for styrene-butadiene rubber (SBR)/silica composites were examined by oxidation induction time (OIT) test, methanol extraction experiments, accelerated thermo-oxidative aging tests as well as thermogravimetric (TG) test. The results indicated that the macromolecular antioxidant COS-AO presented better extraction resistance and migration resistance in SBR/silica composites compared to the small molecular antioxidant AO. Moreover, COS-AO significantly improved the thermal stability as well as the value of the oxidation induction time of SBR/silica composites, exhibiting superior thermo-oxidative aging resistance. In addition, the potential antioxidative mechanism of COS-AO in SBR/silica composites was also discussed.</p>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43747341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lightweight and flame retardant fluorosilicone rubber composited foam prepared by supercritical nitrogen","authors":"Zhen Yu,&nbsp;Yifa Song,&nbsp;Lijuan Yang,&nbsp;Shibao Wen,&nbsp;Yingjie Zhao,&nbsp;Yongxian Zhao,&nbsp;Zhenxiu Zhang","doi":"10.1002/vnl.22025","DOIUrl":"10.1002/vnl.22025","url":null,"abstract":"<p>Improving the flame retardancy and lightweight of fluorosilicone rubber (FSR) foam is important for its application in aerospace, rail transportation, petrochemical equipment, etc. In this work, ammonium polyphosphate (APP) and expandable graphite (EG) were used as synergistic flame retardants, and the lightweight FSR composite foam with flame retardancy was prepared by supercritical N₂ foaming. When there were 12.5 phr APP and 7.5 phr EG, the composite foam with density of 0.254 g/cm³ showed superiority in foaming performance and flame retardancy, and the limit oxygen index was 36.4%, the UL-94 grade reached V-0, the ignition time was 12 s and the fire performance index was 0.071 s·m²/kW. In addition, the aging, oil and solvent resistance of FSR foam was not affected. This work provided data support for the production and application of the flame retardant FSR foam.</p>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45685825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Studying the photodecomposition rate constant and morphology properties of modified poly(vinyl chloride) with novel Schiff's bases","authors":"Mohammed Kadhom,&nbsp;Alaa Mohammed,&nbsp;Hassan Ghani,&nbsp;Amer Adnan Hasan,&nbsp;Omar G. Mousa,&nbsp;Roaa T. Abdulla,&nbsp;Wedad H. Al-Dahhan,&nbsp;Mohammed H. Al-Mashhadani,&nbsp;Rahimi M. Yusop,&nbsp;Emad Yousif","doi":"10.1002/vnl.22027","DOIUrl":"10.1002/vnl.22027","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>The photodegradation of a poly(vinyl chloride) (PVC) film filled with Schiff bases in its structure was investigated and studied by comparing it with a blank PVC film. A PVC film containing novel Schiff's bases was synthesized and used as a photostabilizer for PVC. PVC was exposed to ultraviolet light and underwent harmful changes, where the photostabilization effect differed before and after filling aromatic Schiff bases within the structure. After 300 h of UV irradiation, the photodecomposition rate constants were calculated to identify the impact of Schiff bases on PVC films. In order to evaluate the impact of adding Schiff bases as photo-stabilizers, the evolution of different functional groups during irradiation was monitored using FTIR spectra. Also, scanning electron microscopy (SEM) and atomic force microscopy (AFM) were exploited to examine the surface morphology of produced polymers. These investigations showed that filling novel Schiff bases inside the polymers performed much better photostabilization than plain PVC. Hence, the photodecomposition rate constant, on the other hand, was calculated alongside the irradiation time.</p>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46121567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Designing improved electromagnetic shielding efficacy of poly(3-hydroxybutyrate-co-3hydroxyvalerate) nanocomposites foam using carbon nanotubes and graphene nanoplatelets","authors":"Longzhen Wang,&nbsp;Xinyi Wei,&nbsp;Yu'an Bai,&nbsp;Hongfu Zhou,&nbsp;Xiangdong Wang,&nbsp;Bianying Wen,&nbsp;Yaqiao Wang","doi":"10.1002/vnl.22030","DOIUrl":"10.1002/vnl.22030","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Nowadays, one of the design direction of bio-derived and biodegradable polymer foams with multi-functionalization is how to attain superior electromagnetic interference (EMI) shielding property, which has become a hot topic. Herein, bio-based poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) foams filled with carbon nanotubes (CNTs) and/or graphene nanoplatelets (GNPs) were fabricated by supercritical carbon dioxide. As observed by optical microscope and scanning electron microscope, the CNTs and GNPs in PHBV matrix might gradually construct three kinds of network structures (CNTs-CNTs, GNPs-GNPs and GNPs-CNTs network structures), which would improve the melt viscoelasticity, crystallization, electrical, dielectric and EMI shielding properties of PHBV. The complex viscosity and storage modulus of PHBV nanocomposites with the ratio of CNTs/GNPs as 1:1 rose nearly three orders of magnitudes than those of pure PHBV, in addition, its crystallization temperature and crystallinity increased remarkably to 122°C and 62%, individually. When the CNTs/GNPs ratio was 1:1 at a low total content of 3 wt%, PHBV nanocomposite and its foam implemented the high dielectric properties. Furthermore, the EMI specific shielding effectiveness of obtained PHBV was blend with 1.5 wt% CNTs and 1.5 wt% GNPs nanocomposite foam was the highest, reaching 19.3 dB cm³/g. This work paved a feasible way to the production of eco-friendly PHBV nanocomposite foams for the application of electronics and aerospace industries.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>PHBV/CNTs/GNPs foams were prepared using a scCO₂-assisted foaming method.</li>\u0000 \u0000 <li>Dispersion of carbon fillers in PHBV was the best as CNTs/GNPs ratio was 1:1.</li>\u0000 \u0000 <li><i>G</i>' of PHBV/C1.5/G1.5 specimens were increased by three orders of magnitude.</li>\u0000 \u0000 <li>EMI specific shielding effectiveness of PHBV/C1.5/G1.5 nanocomposite foam could reach 19.3 dB cm³/g.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46365001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of ecofriendly grapefruit peel extract on PVC thin films photostabilizing tested under harmful weathering conditions","authors":"Hameed Ahmed,&nbsp;Ahmed Ahmed,&nbsp;Emad Yousif,&nbsp;Dina S. Ahmed,&nbsp;Mohammed Kadhom,&nbsp;Amani Husain,&nbsp;Rahimi Yusop,&nbsp;Muna Bufaroosha","doi":"10.1002/vnl.22029","DOIUrl":"10.1002/vnl.22029","url":null,"abstract":"<p>Exposure to ultraviolet radiation triggers a photooxidative deterioration mechanism in plastics, resulting in bond breakage, release of volatile substances, overall weight reduction, generation of free radicals, and loose crosslinking. The aim of this study was to obtain a plant extract with appropriate concentration and use it to protect polyvinyl chloride (PVC) from photodegradation. PVC films containing different concentrations of naringin that were already extracted and TINUVIN 622 as a commercial stabilizer were investigated in this paper. UV light was used to irradiate PVC films for 300 h to test the photostability. After radiation, infrared spectra, weight loss, molecular weight reduction, and surface morphology examination for PVC films were studied. In comparison to blank film, the photodegradation of PVC films was significantly reduced by the naringin and TINUVIN 622 photostabilizers. The role of photostabilizers includes deactivating excited states (as quenchers), functioning as effective light filters (pigments and absorbers), scavenging radicals, and decomposing hydroperoxides.</p>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45304061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PVC polymer/ZnO/NiO/Co3O4 nanocomposites: Toward improved optical properties","authors":"A. M. El-naggar,&nbsp;Zein K. Heiba,&nbsp;A. M. Kamal,&nbsp;Omar H. Abd-Elkader,&nbsp;M. Abdellatief,&nbsp;Mohamed Bakr Mohamed","doi":"10.1002/vnl.22028","DOIUrl":"10.1002/vnl.22028","url":null,"abstract":"<p>Undoped and doped polyvinyl chloride (PVC) with zinc, nickel and cobalt oxides, ZnO/[(1<b>−</b>x)NiO/xCo₃O₄], composites were fabricated using co-precipitation and casting techniques. The different phases present in the nanofiller ZnO/[(1<b>−</b>x)NiO-xCo₃O₄] mixed oxides were determined using synchrotron x-ray diffraction technique. X-ray diffraction, scanning electron microscopy (SEM) images and energy dispersive spectroscopy (EDS) analysis techniques were used to investigate the structure, composition, and morphology of pure and loaded PVC with nanofiller oxides. In general, compared with pure PVC, the absorbance was greatly enhanced, especially in the UV region, upon loading ZnO/[(1−x)NiO-xCo₃O₄], but it changed irregularly with the cobalt oxide (Co₃O₄) content (x). The direct and indirect optical band gaps of pristine PVC (4.14, 4.12 eV) reduced irregularly to minimum values 3.97 and 3.23 eV respectively for the polymer doped with ZnO/[0.3NiO/0.7Co₃O₄]. The refractive index was enhanced in the visible and IR regions and attained its highest value for PVC doped with zinc oxide/nickel oxide (ZnO/NiO) only (<i>x</i> = 0.0). NiO and Co₃O₄ ratios affect the linear and nonlinear optical parameters. The emitted spectra from pure and doped PVC polymers with the composite oxides [ZnO/[(1−x)NiO-xCo₃O₄] under different excitation wavelengths were also explored. The FL intensity enhanced for the excitation wavelengths (<i>λ</i>_exc) = 380 and 434 nm but quenched for <i>λ</i>_exc = 317 nm. The loaded polymers absorb UVA, UVB, and UVC rays and are good candidates for solar cell applications.</p>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42714817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrolytic and thermal stability of urea-formaldehyde resins based on tannin and betaine bio-fillers","authors":"Mirjana Ristić,&nbsp;Suzana Samaržija-Jovanović,&nbsp;Vojislav Jovanović,&nbsp;Marija Kostić,&nbsp;Tamara Erceg,&nbsp;Tijana Jovanović,&nbsp;Gordana Marković,&nbsp;Milena Marinović-Cincović","doi":"10.1002/vnl.22024","DOIUrl":"10.1002/vnl.22024","url":null,"abstract":"<p>In this work, betaine (trimethyl glycine) and tannin (complex biomolecules of polyphenolic nature) were used as bio-fillers. Urea-formaldehyde (UF) resin with a molar ratio of formaldehyde versus urea (FA/U) of 0.8 was synthesized <i>in situ</i> with tannin and betaine as bio-fillers, to obtain UF resin with reduced free FA content and increased hydrolytic and thermal stability by the principles of sustainability. The samples TUF (with tannin) and BUF (with betaine) were characterized by using X-ray diffraction analysis (XRD), non-isothermal thermogravimetric analysis (TGA), and differential thermal analysis (DTA), supported by data from Fourier Transform Infrared spectroscopy (FTIR) and Scanning electron microscopy (SEM). The percentage of free FA in modified BUF resin is 0.1%, while the percentage of free FA in tannin-modified resin is 0.8%. The hydrolytic stability of the modified UF resins was determined by measuring the concentration of liberated FA in the modified UF resins, after acid hydrolysis. The modified BUF resin is hydrolytically more stable because the content of released FA is 3.6% compared to the modified TUF resin, where it was 7.4%. Based on the value for T₅_%, the more thermally stable resin is the modified TUF resin (T_5% = 123.1°C), while the value of the T_5% for the BUF resin is 83.1°C. This work showed how UF bio-composite with reduced free FA content and increased hydrolytic and thermal stability can be obtained using tannin and betaine as bio-fillers.</p>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42854154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3D polymer composite filament development from post-consumer polypropylene and disposable chopstick fillers","authors":"Yee Ai Tan,&nbsp;Ming Yeng Chan,&nbsp;Seong Chun Koay,&nbsp;Thai Kiat Ong","doi":"10.1002/vnl.22026","DOIUrl":"10.1002/vnl.22026","url":null,"abstract":"<p>This study focused on the development of three-dimensional (3D) polymer composite filament made of disposable chopstick (DC) and post-consumer polypropylene (PPP). The PPP/DC composite parts were printed via fused filament fabrication (FFF) process. The effect of the printing temperature and different DC fiber content on the properties of the 3D printed parts were investigated. The printing temperature of 200–220°C was suitable for these filaments because the printing temperature did not show any thermal degradation, as proven by thermogravimetric analysis. Furthermore, the thermal stability of the 3D filament increased with DC content. The chemical modification with sodium hydroxide (NaOH) was carried out on DC to remove the unwanted organic components by showing changes in peak intensity in the Fourier transform infrared analysis. Moreover, the melt flow index of the composite filaments decreased with increasing of the DC content and caused the composites' viscosity increased. The results show that the optimum printing temperature of 210°C would reduce the warping and gave better tensile properties to the 3D printed parts. Nevertheless, the tensile strength and elongation at break of the 3D printed PPP/DC parts reduced as the DC content increased because the presence of some air gap and fiber pull out on the fracture surface of 3D printed parts, which are in line with the results observed from scanning electron microscopy. However, the tensile strength and elongation at break percentage of all 3D printed PPP/DC composite parts were higher in comparison with the 3D parts printed by commercial wood plastic composite filament.</p>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41866703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improvement of photostability and thermal stability of PVC by carbon quantum dots loaded on TiO2","authors":"Chen Yu,&nbsp;Degang Li,&nbsp;Wenyuan Han,&nbsp;Yifan Kong,&nbsp;Lijie Zhang,&nbsp;Mingguang Chen,&nbsp;Kunsheng Hu","doi":"10.1002/vnl.22012","DOIUrl":"10.1002/vnl.22012","url":null,"abstract":"<p>Titanium dioxide (TiO₂) has a strong oxidation effect when absorbing ultraviolet light. Therefore, when TiO₂ is used as a light stabilizer in polyvinyl chloride (PVC), it will cause the photodegradation of PVC. Herein, carbon quantum dots (CQDs) coated TiO₂ composite (TiO₂@CQDs) was prepared by a one-step hydrothermal method. The prepared TiO₂@CQDs were characterized by transmission electron microscopy (TEM), UV–Vis spectroscopy, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The photostability of PVC film containing TiO₂@CQDs was investigated via photodegradation conductivity test, weight loss rate test, and ultraviolet aging test. Due to the down-conversion effect of CQDs under ultraviolet light, its existence can alleviate the photoaging of PVC. In addition, the thermal stability of PVC containing TiO₂@CQDs was studied by conductivity tests and oven thermal aging tests. The presence of CQDs significantly improved the thermal stability of PVC. Meanwhile, the HCl absorption capacity of CQDs could reach 30.8 mg/g_cat. According to the DFT calculations, this high absorption capacity is attributed to the HCl immobilization effect via forming hydrogen bonds between HCl and the keto oxygen, carboxyl keto oxygen in CQDs. The hydroxyl group in CQDs could also combine ZnCl₂ by forming a coordination bond.</p>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42647887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}