Journal of Vinyl & Additive Technology最新文献_第3页

Posidonia oceanica Leaves as a Natural Filler for Poly(Butylene Succinate-Co-Adipate) Composites: Characterization and Biodegradation Assessment in Seawater 作为天然填料的聚琥珀酸丁二烯-共己二酸酯复合材料：表征及在海水中的生物降解评价

IF 4 4区工程技术

Journal of Vinyl & Additive Technology Pub Date : 2026-07-31 Epub Date: 2026-05-07 DOI: 10.1002/vnl.70119

Chiara Pedrotti, Damiano Rossi, Giovanni Raimondi, Riccardo Gallorini, Miriam Cappello, Irene Anguillesi, Marco Sandroni, Patrizia Cinelli, Maurizia Seggiani

{"title":"Posidonia oceanica Leaves as a Natural Filler for Poly(Butylene Succinate-Co-Adipate) Composites: Characterization and Biodegradation Assessment in Seawater","authors":"Chiara Pedrotti, Damiano Rossi, Giovanni Raimondi, Riccardo Gallorini, Miriam Cappello, Irene Anguillesi, Marco Sandroni, Patrizia Cinelli, Maurizia Seggiani","doi":"10.1002/vnl.70119","DOIUrl":"https://doi.org/10.1002/vnl.70119","url":null,"abstract":"This study investigates the use of \u0000 Posidonia oceanica\u0000 (PO) leaves, derived from coastal banquette residues, as a filler in PBSA, aiming to valorise a natural biomass typically treated as waste within a circular materials approach, while reducing production costs and enhancing seawater biodegradation of the polymer matrix. Composites containing 5 and 10 wt.% of PO, with and without micro-talc, were prepared via extrusion and injection molding. Materials were characterized morphologically, chemically, thermally, and mechanically, while biodegradation was assessed in a controlled seawater environment. Thermal analyses confirm that both PO and micro-talc do not compromise PBSA thermal stability, with degradation temperatures remaining at approximately 403°C. Calorimetric results highlighted an increment of crystallization temperature and the appearance of a secondary melting peak at ~79°C, while the main PBSA melting peak remains at ~85°C and overall crystallinity degree is unchanged. Chemical and morphological analyses reveal no chemical interactions and confirm homogeneous filler dispersion with good interfacial adhesion. Mechanical testing shows a moderate stiffening and embrittling effect with the addition of PO, with elastic modulus increasing from 0.32 to 0.51 GPa and elongation at break decreasing from 450% to 325%, while impact toughness is markedly reduced at high filler loadings. Seawater exposure demonstrates accelerated biodegradation for Posidonia-filled composites, showing a ~20% mass loss after 4 months and rapid mechanical deterioration. The incorporation of PO fillers constitutes an effective approach to modulate and accelerate degradation under marine conditions.","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"32 4","pages":"988-1005"},"PeriodicalIF":4.0,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/vnl.70119","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Processing Stabilization of Polyolefin Recyclates Using Alditols in Combination With α-Tocopherol: A Sustainable Alternative to Phosphites 糖醇与α-生育酚联合用于聚烯烃回收物的加工稳定：一种可持续的亚磷酸盐替代品

IF 4 4区工程技术

Journal of Vinyl & Additive Technology Pub Date : 2026-07-31 Epub Date: 2026-02-05 DOI: 10.1002/vnl.70076

Kim Hao Ng, Jan-Hendrik Arndt, Elke Metzsch-Zilligen, Rudolf Pfaendner

{"title":"Processing Stabilization of Polyolefin Recyclates Using Alditols in Combination With α-Tocopherol: A Sustainable Alternative to Phosphites","authors":"Kim Hao Ng, Jan-Hendrik Arndt, Elke Metzsch-Zilligen, Rudolf Pfaendner","doi":"10.1002/vnl.70076","DOIUrl":"https://doi.org/10.1002/vnl.70076","url":null,"abstract":"This study introduces a novel bio-based stabilizer system for polyolefin recyclates that combines alditols with small amounts of α-tocopherol as a sustainable alternative to conventional phosphite additives. The aim of this work is to evaluate the synergistic stabilization of alditols with α-tocopherol and to benchmark their performance against conventional phosphite systems under multiple extrusion in various polyolefin recyclates. Compared to industrial standards and state-of-the-art recycling stabilizers, the new formulations demonstrate superior performance particularly in melt stability, oxidation resistance, and retention of molecular weight during multiple extrusion in various recycled polyolefin grades. Clear synergistic effects between the stabilizer components were observed supported by mechanistic considerations. Hexanehexol-based systems showed the best overall performance among the alditol derivatives. The results highlight a promising pathway toward greener additive technologies that support sustainable recycling and processing of polyolefin recyclates. Overall, the combination of alditols with α-tocopherol alongside established antioxidants provides a robust and environmentally compatible strategy for advancing sustainable stabilization of recycled polyolefins.","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"32 4","pages":"915-928"},"PeriodicalIF":4.0,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/vnl.70076","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photooxidation of Polyethylene: Chemical Mechanisms and Advanced Characterization Strategies 聚乙烯光氧化：化学机理和先进表征策略

IF 4 4区工程技术

Journal of Vinyl & Additive Technology Pub Date : 2026-07-31 Epub Date: 2026-02-22 DOI: 10.1002/vnl.70084

Jean-Luc Gardette, Sandrine Therias

{"title":"Photooxidation of Polyethylene: Chemical Mechanisms and Advanced Characterization Strategies","authors":"Jean-Luc Gardette, Sandrine Therias","doi":"10.1002/vnl.70084","DOIUrl":"https://doi.org/10.1002/vnl.70084","url":null,"abstract":"<div>\u0000 \u0000 Polymeric materials, despite their widespread industrial use, are intrinsically vulnerable to environmental degradation, particularly through photo- and thermo-oxidative processes initiated by solar UV radiation. This article reviews the fundamental mechanisms governing the oxidative aging of polyethylene and examines how these processes control macromolecular deterioration and loss of performance. Emphasis is placed on the role of chromophoric impurities, the radical chain reactions that drive photooxidation, and the competing pathways that differentiate UV-induced and thermally induced oxidation. The limitations of conventional accelerated aging tests are discussed, highlighting the importance of ensuring mechanistic equivalence between laboratory and natural weathering conditions. A comprehensive overview of analytical methodologies for elucidating the oxidation mechanisms—including infrared spectroscopy, derivatization techniques, fluorescence probing, electron spin resonance, calorimetry, and gas-phase analysis—is provided, with particular attention to approaches enabling early detection of oxidation and assessment of spatial heterogeneity. Polyethylene serves as a model system to illustrate how molecular-level transformations, oxidation kinetics, and environmental factors interplay to shape the degradation behavior of polyolefins. The combined mechanistic and analytical perspectives presented here offer a robust basis for improving stabilization strategies and enhancing the predictive reliability of durability assessments for polymeric materials exposed to outdoor environments.\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"32 4","pages":"854-864"},"PeriodicalIF":4.0,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647913","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}

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Study of the Thermal and Hydrothermal Aging Effects on the Properties of 3D-Printed Thermoplastic Polyurethane 热、水热老化对3d打印热塑性聚氨酯性能影响的研究

IF 4 4区工程技术

Journal of Vinyl & Additive Technology Pub Date : 2026-07-31 Epub Date: 2025-07-14 DOI: 10.1002/vnl.70004

Busra Eyri, Okan Gul, N. Gamze Karsli, Taner Yilmaz

{"title":"Study of the Thermal and Hydrothermal Aging Effects on the Properties of 3D-Printed Thermoplastic Polyurethane","authors":"Busra Eyri, Okan Gul, N. Gamze Karsli, Taner Yilmaz","doi":"10.1002/vnl.70004","DOIUrl":"https://doi.org/10.1002/vnl.70004","url":null,"abstract":"In this study, the thermal and hydrothermal aging of TPU produced with the FDM technique was simulated and subjected to a series of tests. The alterations in the internal structures of the samples that had been subjected to tensile, hardness, adhesive wear tests, DSC, and optical microscopy analyses were examined. Mechanical tests revealed an increase in tensile strength, hardness, and elastic modulus in aged samples. Tribological tests showed an increase in the coefficient of friction in both types of aging, with the thermally aged sample exhibiting the highest value. DSC analyses revealed that hydrothermal aging led to an increase in crystallinity, while thermal aging resulted in a decrease in crystallinity despite an increase in rigidity in the amorphous regions. Microstructural analysis showed that the number of voids decreased and interlayer bonds strengthened after aging. The results obtained indicate that aging processes significantly affect the mechanical and tribological performance of TPU. In particular, hydrothermal aging causes a marked increase in modulus and crystallinity, while thermal aging has been the most influential method on hardness and coefficient of friction. The absence of mass loss in the samples during wear tests indicates that surface deformation remains limited with aging, suggesting that aging provides a more stable surface behavior. These findings highlight the necessity of optimizing aging conditions specifically for the application.","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"32 4","pages":"889-902"},"PeriodicalIF":4.0,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/vnl.70004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Uracil Pinking in Polyvinylchloride 尿嘧啶在聚氯乙烯中呈粉红色

IF 4 4区工程技术

Journal of Vinyl & Additive Technology Pub Date : 2026-07-31 Epub Date: 2026-04-05 DOI: 10.1002/vnl.70099

S. Gardi, C. Bandinelli, L. Giannone, G. Sarti, Gianluca Sarti, I. Werner

{"title":"Uracil Pinking in Polyvinylchloride","authors":"S. Gardi, C. Bandinelli, L. Giannone, G. Sarti, Gianluca Sarti, I. Werner","doi":"10.1002/vnl.70099","DOIUrl":"https://doi.org/10.1002/vnl.70099","url":null,"abstract":"<div>\u0000 \u0000 Harsh environmental conditions, such as extreme temperatures, high humidity, and sunlight, are the leading causes of PVC items' degradation during their service life. In particular, light can trigger not only severe weathering of outdoor PVC articles, leading to degradation of the PVC matrix, but also milder phenomena that primarily affect color without compromising the material's mechanical properties. Those phenomena are not of secondary importance because they often require the substitution of damaged items, which impacts the costs and durability (and therefore sustainability) of the article. One of these issues is uracil pinking that occurs when the thermal stabilizer used in the finished item contains 1,3-dimethyl-4-amino uracil. This substance is commonly used as a primary stabilizer; moreover, in items such as PVC pipes, fittings, and roofing membranes. Specifically, PVC pipes containing 1,3-dimethyl-4-aminouracil can undergo severe discoloration, compromising their use. Understanding uracil pinking in terms of its triggering and chemistry, it is essential to prevent or mitigate it. Therefore, in this paper, the aging of several rigid PVC formulations containing 1,3-dimethyl-4-amino uracil was performed. The aging was carried out using natural outdoor and accelerated weathering, both direct and modulated by filters. Specifically, cut-off filters were used to understand which wavelengths are capable of triggering the uracil pinking through colorimetric measurements according to the CIE colorimetric system of ASTM E308-22. In the current literature, uracil pinking has always been associated with the presence of titanium dioxide. Our findings show that the phenomenon occurs even in the absence of titanium dioxide. The investigation on the chemical mechanisms responsible for the uracil pinking is outside the scope of our work and still to be identified, but for sure they do not involve only titanium dioxide.\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"32 4","pages":"1030-1038"},"PeriodicalIF":4.0,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647942","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}

引用次数: 0

Coarse-Grained Molecular Dynamics Simulations of Oxidative Aging and Stabilization in Polymer Melts With Primary Antioxidants: Effects of Antioxidant Concentration and Molecular Architecture 含初级抗氧化剂聚合物熔体氧化老化和稳定的粗粒度分子动力学模拟：抗氧化剂浓度和分子结构的影响

IF 4 4区工程技术

Journal of Vinyl & Additive Technology Pub Date : 2026-07-31 Epub Date: 2026-04-06 DOI: 10.1002/vnl.70104

Takato Ishida, Emmanuel Richaud

引用次数: 0

Historical Perspectives and Reflections on the Degradation and Stabilization of Polymer Materials 高分子材料降解与稳定的历史展望与思考

IF 4 4区工程技术

Journal of Vinyl & Additive Technology Pub Date : 2026-07-31 Epub Date: 2025-11-12 DOI: 10.1002/vnl.70042

Norman S. Allen

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New Antiozonants for Rubber Protection Based on Derivatives of a Naturally Occurring Molecule: Camphor 基于天然分子衍生物的新型橡胶防臭氧剂：樟脑

IF 4 4区工程技术

Journal of Vinyl & Additive Technology Pub Date : 2026-07-31 Epub Date: 2026-04-03 DOI: 10.1002/vnl.70107

Franco Cataldo

{"title":"New Antiozonants for Rubber Protection Based on Derivatives of a Naturally Occurring Molecule: Camphor","authors":"Franco Cataldo","doi":"10.1002/vnl.70107","DOIUrl":"https://doi.org/10.1002/vnl.70107","url":null,"abstract":"<div>\u0000 \u0000 Two new antiozonant molecules (for diene rubber compounds) have been synthesized using (1R,4R)(+)-camphor as key raw material derived from the renewable source \u0000 Cinnamomum camphora\u0000 tree. The diimine reaction product of p-phenylenediamine (p-PPD) and two molecules of camphor was reduced in situ with NaBH4, yielding N,N′-dicamphyl-p-phenylenediamine (2Cam-PD). Similarly, the imine reaction intermediate between ADPA (4-aminodiphenylamine) and one molecule of camphor was reduced in situ, producing N-camphyl-N′-phenyl-p-phenylenediamine (Cam-PPD). The two new antiozonants were characterized by FT-IR spectroscopy and by DSC analysis in comparison to the diimine (2Cam-PD-diimine) and imine (Cam-PPD-imine) intermediates, respectively. DSC analysis was also made on the starting reagents p-PPD, ADPA, and (1R,4R)(+)-camphor. The properties of 2Cam-PD and Cam-PPD are discussed in comparison to the currently used antiozonants. Particular emphasis is addressed toward the analogies of 2Cam-PD with the “safe” antiozonant CCPD (N,N′-dicyclohexyl-p-phenylenediamine) and Cam-PPD with CPPD (N-cyclohexyl-N′-phenyl-p-phenylenediamine). The raw material fraction derived from the renewable source is 73.8% for 2Cam-PD and 45.2% for Cam-PPD.\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"32 4","pages":"1021-1029"},"PeriodicalIF":4.0,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647787","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}

引用次数: 0

Antioxidant and UV Shielding Dual-Functional Bio-Based Superhydrophobic Film for Sustainable Food Packaging: Lignin–TPS Based Composite Coating System 用于可持续食品包装的抗氧化和紫外线屏蔽双功能生物基超疏水膜：木质素- tps基复合涂层体系

IF 4 4区工程技术

Journal of Vinyl & Additive Technology Pub Date : 2026-07-31 Epub Date: 2026-02-22 DOI: 10.1002/vnl.70086

Wenyao Feng, Feng Li, Guiqing Lei, Wangqian Chen, Wenbin Xu, Boshen Meng, Changzhou Chen, Hongrui Jiang, Douyong Min

{"title":"Antioxidant and UV Shielding Dual-Functional Bio-Based Superhydrophobic Film for Sustainable Food Packaging: Lignin–TPS Based Composite Coating System","authors":"Wenyao Feng, Feng Li, Guiqing Lei, Wangqian Chen, Wenbin Xu, Boshen Meng, Changzhou Chen, Hongrui Jiang, Douyong Min","doi":"10.1002/vnl.70086","DOIUrl":"https://doi.org/10.1002/vnl.70086","url":null,"abstract":"<div>\u0000 \u0000 As a hydrophobic coating agent formulated with methyltrimethoxysilane (MTMS) and nano-silica (SiO2) was coated on the lignin-reinforced thermoplastic starch (TPS), a sustainable packaging material with excellent antioxidant, ultraviolet-resistant, and high-barrier properties was developed. The TPS/lignin composite substrate was prepared by extrusion, and MTMS/SiO2 was coated on the surface of TPS/lignin through a spraying process. The composite samples were subjected to a series of characterizations and tests, including SEM, FT-IR, water contact angle measurement, antioxidant property analysis, and UV shielding performance evaluation, and so forth. The results revealed that the introduction of lignin effectively improved the mechanical properties and ultraviolet shielding characteristics of the composite film, and the coating of MTMS/SiO2 endowed the composite super hydrophobicity, for example, the water contact angle reaches over 157.26°. The water vapor transmission rate of the composite is reduced to 626.17 g/(m2 24h), the ultraviolet shielding rate exceeds 99%, and the DPPH radical scavenging rate is reached 83.15%. In addition, the composite exhibits outstanding biodegradability. Overall, this study provides new ideas for the development of high-performance, multifunctional, and environmentally friendly food packaging materials.\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"32 4","pages":"978-987"},"PeriodicalIF":4.0,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647912","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}

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An Examination of the Effect of Short-Term High Heat Exposure on Rubber Compounds. Part I: Nitrile Rubber 短期高温暴露对橡胶化合物影响的研究。第一部分：丁腈橡胶

IF 4 4区工程技术

Journal of Vinyl & Additive Technology Pub Date : 2026-07-31 Epub Date: 2026-01-19 DOI: 10.1002/vnl.70065

Christopher Porter, Badruz Zaman, Sunil Sinha, Richard Pazur

{"title":"An Examination of the Effect of Short-Term High Heat Exposure on Rubber Compounds. Part I: Nitrile Rubber","authors":"Christopher Porter, Badruz Zaman, Sunil Sinha, Richard Pazur","doi":"10.1002/vnl.70065","DOIUrl":"https://doi.org/10.1002/vnl.70065","url":null,"abstract":"<div>\u0000 \u0000 A sulfur cured nitrile rubber compound was subjected to high heat conditions from 175°C to 350°C for a duration of less than 2 h. The heat aged samples were thereafter characterized by hardness, tensile properties, volatile content, chemical crosslink density by Double Quantum Nuclear Magnetic Resonance (DQ-NMR) and equilibrium solvent swell testing in toluene, Fourier Transform Infrared Spectroscopy (FT-IR), Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC). Thermal aging at temperatures above 175°C caused a rapid increase in compound stiffness (hardness and 10% tensile stress) with a corresponding loss in tensile ultimate properties due primarily to the rise in the crosslink density and accompanying loss of plasticizer. The 350°C heat aged samples showed surface bubbling and physical distortion, and were not used for quantitative analysis. High heat application significantly alters the surface chemistry of the compound, causing the chemical loss of the cyano (CN) and unsaturation contents. The high heat aging process promoted primarily thermal aging with no detectable signs of oxidation. The glass transition temperature measured by DSC proved to be sensitive to the degradative changes given the increase in its magnitude in the heat aged nitrile rubber. Activation energies are slightly lower than expectations for hardness, mechanical properties and chemical crosslink density. Activation energies measured by FTIR and DSC were more in agreement in comparison to those measured using lower temperature aging. The data generated in this investigation on exposing a sulfur cured nitrile rubber to high temperatures for short durations can be applied to help determine exposure times and/or temperatures near the heat generating source.\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"32 4","pages":"1006-1020"},"PeriodicalIF":4.0,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148647757","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}

引用次数: 0