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Front Cover: Macromol. React. Eng. 6/2024 封面：Macromol。反应。Eng。6/2024
IF 1.8 4区 工程技术
Macromolecular Reaction Engineering Pub Date : 2024-12-16 DOI: 10.1002/mren.202470011
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引用次数: 0
Grafting Well-Defined Synthetic Polymers to Chitosan Nanocrystals via Nitroxide-Mediated Polymerization
IF 1.8 4区 工程技术
Macromolecular Reaction Engineering Pub Date : 2024-12-04 DOI: 10.1002/mren.202400031
Carlos Antonio Ramirez-Foyo, Omar García-Valdez, Alfred C. W. Leung, Edmond Lam, Pascale Champagne, Michael F. Cunningham
{"title":"Grafting Well-Defined Synthetic Polymers to Chitosan Nanocrystals via Nitroxide-Mediated Polymerization","authors":"Carlos Antonio Ramirez-Foyo,&nbsp;Omar García-Valdez,&nbsp;Alfred C. W. Leung,&nbsp;Edmond Lam,&nbsp;Pascale Champagne,&nbsp;Michael F. Cunningham","doi":"10.1002/mren.202400031","DOIUrl":"https://doi.org/10.1002/mren.202400031","url":null,"abstract":"<p>Chitosan nanocrystals (ChsNCs) are a renewable resource attracting research interest due to their outstanding physical, chemical, and mechanical properties. ChsNCs exhibit promising potential applications as reinforcing materials in polymer-based nanocomposites. However, the hydrophilic surface of ChsNCs leads to poor dispersibility in hydrophobic polymer matrices, hindering these potential applications. In this work, the first graft modification of ChsNCs using nitroxide-mediated polymerization (NMP) is reported. ChsNCs are initially functionalized with glycidyl methacrylate to provide a reactive surface group that enables the polymer-graft modification. Polystyrene and poly (methyl methacrylate) with well-defined molecular weight polymers are first synthesized via NMP, and the polymers are then <i>“grafted to”</i> the ChsNCs surface, yielding polymer-graft modified ChsNCs.</p>","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431424","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
Modeling of 1,6-Hexanediol Diacrylate Photopolymerization with Spatial Gradients and Film Shrinkage 1,6-己二醇二丙烯酸酯光聚合的空间梯度和薄膜收缩建模
IF 1.8 4区 工程技术
Macromolecular Reaction Engineering Pub Date : 2024-11-29 DOI: 10.1002/mren.202400038
Alaa El Halabi, Anh-Duong Dieu Vo, Kaveh Abdi, Piet D. Iedema, Kimberley B. McAuley
{"title":"Modeling of 1,6-Hexanediol Diacrylate Photopolymerization with Spatial Gradients and Film Shrinkage","authors":"Alaa El Halabi,&nbsp;Anh-Duong Dieu Vo,&nbsp;Kaveh Abdi,&nbsp;Piet D. Iedema,&nbsp;Kimberley B. McAuley","doi":"10.1002/mren.202400038","DOIUrl":"https://doi.org/10.1002/mren.202400038","url":null,"abstract":"<p>A dynamic model is proposed to account for shrinkage and swelling during the photopolymerization of 1,6-hexanediol diacrylate (HDDA) with the bifunctional initiator bis-acylphosphine oxide (BAPO) in the presence of oxygen. The model is composed of 14 partial differential equations (PDEs) that are used to track changes in film thickness along with time- and spatially-varying concentrations of monomer, initiator, oxygen, pendant vinyl groups, and seven types of radicals. Shrinkage has a noticeable influence on the model predictions. For a variety of simulated photopolymerization experiments, there is ≈9% discrepancy between predicted overall vinyl-group conversions obtained from the current model with shrinkage and a previous model without. Prediction discrepancies become larger for simulated experiments involving thin films (8 µm) or low light intensities (1200 W m<sup>−2</sup>). In the future, it will be important to re-estimate the kinetic parameters used in the shrinkage model to obtain accurate model predictions for use in process improvement studies.</p>","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mren.202400038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431842","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
A Soft–Soft Nanocomposite Approach for Design of Water-Borne Acrylic Surface Coatings 设计水性丙烯酸表面涂料的软-软纳米复合方法
IF 1.8 4区 工程技术
Macromolecular Reaction Engineering Pub Date : 2024-11-22 DOI: 10.1002/mren.202400032
Elizabeth M. Eaves, Peter A. Lovell
{"title":"A Soft–Soft Nanocomposite Approach for Design of Water-Borne Acrylic Surface Coatings","authors":"Elizabeth M. Eaves,&nbsp;Peter A. Lovell","doi":"10.1002/mren.202400032","DOIUrl":"https://doi.org/10.1002/mren.202400032","url":null,"abstract":"<p>Poly[(<i>n</i>-butyl methacrylate)-<i>co</i>-(<i>n</i>-butyl acrylate)]-based core-shell latexes are prepared by emulsion polymerization with a shell copolymer glass transition temperature (<i>T</i><sub>g</sub>) of 5 °C, but differences in core copolymer wt.% (4–90) and <i>T</i><sub>g</sub> (5–25 °C), and in wt.% of diacetone acrylamide (DAAM) in the shell copolymer, which facilitates crosslinking in the percolating phase of films through addition of adipic acid dihydrazide. Analysis of samples removed from reactions, together with analysis of film cross-sections by atomic force microscopy (AFM), confirms the core-shell particle structures and honeycomb morphologies in films, with simultaneous AFM and infrared spectroscopy showing the distribution of hydrazone crosslinks. Increasing wt.% DAAM (i.e., degree of crosslinking) in the percolating phase shifts film tensile stress–strain curves towards higher stresses and lower extensions at break. For core and shell copolymer <i>T</i><sub>g</sub>s of 5 °C there is a small effect of core wt.%. At 70 and 80 wt.% core, increasing core copolymer <i>T</i><sub>g</sub> also shifts the curves towards higher stresses and lower extensions at break. Thus by combining effects of core copolymer wt.% and <i>T</i><sub>g</sub> with effects of wt.% DAAM in the shell through the soft–soft nanocomposite approach, it is possible to achieve a wide range of tensile deformation behavior in films that have quite similar overall copolymer compositions.</p>","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mren.202400032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431789","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
Light-Based Desalination of Water Using Polypyrrole-Coated Fabrics
IF 1.8 4区 工程技术
Macromolecular Reaction Engineering Pub Date : 2024-11-15 DOI: 10.1002/mren.202400034
Ryuga Sakabe, Kanade Matsui, Takahiro Funatsu, Tomoyasu Hirai, Yoshinobu Nakamura, Syuji Fujii
{"title":"Light-Based Desalination of Water Using Polypyrrole-Coated Fabrics","authors":"Ryuga Sakabe,&nbsp;Kanade Matsui,&nbsp;Takahiro Funatsu,&nbsp;Tomoyasu Hirai,&nbsp;Yoshinobu Nakamura,&nbsp;Syuji Fujii","doi":"10.1002/mren.202400034","DOIUrl":"https://doi.org/10.1002/mren.202400034","url":null,"abstract":"<p>Fabrics consisting of cotton-core/polypyrrole (PPy)-sheath fibers (cotton/PPy fabrics) are synthesized by aqueous chemical oxidative seeded polymerization of pyrrole and are utilized as a solar evaporation device. Scanning electron microscopy studies and elemental microanalyses reveal the thickness of the PPy sheath increases from a few tens nm to ≈200 nm with an increase of pyrrole monomer concentration in the polymerization system. The temperature of cotton/PPy fabrics increases upon irradiation with artificial sunlight to ≈33–45 °C in the dry state, due to light-to-heat photothermal conversion by the PPy component. Thanks to the photothermal property of the fabrics, water impregnated within the cotton/PPy fabrics can evaporate efficiently under the irradiation of artificial sunlight. Light-induced water evaporation experiment using an artificial seawater confirms that ionic concentrations drastically decreases, indicating successful desalination.</p>","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431167","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
Design and Control of Polymeric Network Architectures Based on Network Dimension Theory
IF 1.8 4区 工程技术
Macromolecular Reaction Engineering Pub Date : 2024-10-26 DOI: 10.1002/mren.202400029
Hidetaka Tobita
{"title":"Design and Control of Polymeric Network Architectures Based on Network Dimension Theory","authors":"Hidetaka Tobita","doi":"10.1002/mren.202400029","DOIUrl":"https://doi.org/10.1002/mren.202400029","url":null,"abstract":"<p>A new design policy to synthesize nanogel molecules having desired dimensions under unperturbed state is proposed. Miniemulsion copolymerization of vinyl and divinyl monomers, both conventional free-radical polymerization and ideal living polymerization, is used to illustrate the method. For the network formation dynamics, the newly proposed model that takes into account the size and structure dependence of cross-linking/cyclization reactions is employed. The master curve relationship that indicates the maximum average dimensions for randomly cross-linked networks is used as a guideline and the network dimension is controlled by the magnitude of network maturity index NMI, which is the average number of cycle rank per primary chain. By appropriately sizing the NMI, it is possible to synthesize network polymers with dimensions equal to or greater than the maximum dimensions achievable with a homogeneous, randomly cross-linked network polymer of the same cycle rank and molecular weight. The current strategy of designing and controlling 3D size is applicable regardless of the reaction mechanism of network formation and will also be applied to the synthesis of macro-gels.</p>","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mren.202400029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431497","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
Structural Evolution of Microgels During Precipitation Polymerization Revealed by Light Scattering and Electrophoresis
IF 1.8 4区 工程技术
Macromolecular Reaction Engineering Pub Date : 2024-10-24 DOI: 10.1002/mren.202400024
Yuji Sato, Ryuji Namioka, Yuichiro Nishizawa, Daisuke Suzuki
{"title":"Structural Evolution of Microgels During Precipitation Polymerization Revealed by Light Scattering and Electrophoresis","authors":"Yuji Sato,&nbsp;Ryuji Namioka,&nbsp;Yuichiro Nishizawa,&nbsp;Daisuke Suzuki","doi":"10.1002/mren.202400024","DOIUrl":"https://doi.org/10.1002/mren.202400024","url":null,"abstract":"<p>While precipitation polymerization allows the synthesis of microgels with controlled functional-group distributions, the structural development of these microgels during the polymerization process still remains unclear. In this study, microgels with different reactivity ratios between the monomer and charged co-monomer are prepared by precipitation polymerization, and the evolution of their size, thermoresponsive behavior, and surface properties during polymerization are evaluated. In particular, the surface properties of the microgels are analyzed quantitatively using the softness parameter and the surface charge density is calculated using Ohshima's equation. The results allowed describing the structural changes of microgels during precipitation polymerization well and provided design guidelines for functional microgels with controlled functional group distributions.</p>","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mren.202400024","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431792","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
Kinetic Investigation of the Emulsion Polymerization of Vinylidene Fluoride
IF 1.8 4区 工程技术
Macromolecular Reaction Engineering Pub Date : 2024-10-18 DOI: 10.1002/mren.202400023
Burak Hanamirian, Azzurra Agostini, Isabelle Chaduc, Giulio Brinati, Bradley Kent, Giuseppe Storti, Mattia Sponchioni
{"title":"Kinetic Investigation of the Emulsion Polymerization of Vinylidene Fluoride","authors":"Burak Hanamirian,&nbsp;Azzurra Agostini,&nbsp;Isabelle Chaduc,&nbsp;Giulio Brinati,&nbsp;Bradley Kent,&nbsp;Giuseppe Storti,&nbsp;Mattia Sponchioni","doi":"10.1002/mren.202400023","DOIUrl":"https://doi.org/10.1002/mren.202400023","url":null,"abstract":"<p>Poly(vinylidene fluoride) (PVDF) is among the most produced fluoropolymers, second only to polytetrafluoroethylene. Despite its popularity, the complex microstructural properties achieved during the polymerization are not well documented in the literature. In particular, available models only track the chain length distribution of the polymer, while neglecting the distribution of other important properties, affecting the final behavior of the product. In this work, a 2D kinetic model, evaluating not only the chain length but also the number of terminal double bonds (TDBs) per chain, is developed. The numerical solution of the model is achieved by fractionating the population of polymer chains into classes with a specific number of TDBs and using the method of moments for each class. The model results are compared with experimental evidences for the amount of produced polymer, moles of main chain-ends, number, and weight average molecular weight as well as full molecular weight distribution. Based on this comparison, kinetic parameters are estimated by optimization using genetic algorithm. The model reliability is finally verified using additional experimental data at different temperatures and amounts of initiator.</p>","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mren.202400023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431762","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
Masthead: Macromol. React. Eng. 5/2024 刊头：Macromol.React.Eng.5/2024
IF 1.8 4区 工程技术
Macromolecular Reaction Engineering Pub Date : 2024-10-18 DOI: 10.1002/mren.202470010
{"title":"Masthead: Macromol. React. Eng. 5/2024","authors":"","doi":"10.1002/mren.202470010","DOIUrl":"https://doi.org/10.1002/mren.202470010","url":null,"abstract":"","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"18 5","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mren.202470010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142451271","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
Front Cover: Macromol. React. Eng. 5/2024 封面：Macromol.React.Eng.5/2024
IF 1.8 4区 工程技术
Macromolecular Reaction Engineering Pub Date : 2024-10-18 DOI: 10.1002/mren.202470009
{"title":"Front Cover: Macromol. React. Eng. 5/2024","authors":"","doi":"10.1002/mren.202470009","DOIUrl":"https://doi.org/10.1002/mren.202470009","url":null,"abstract":"","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"18 5","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mren.202470009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142449035","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
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