Macromolecular Reaction Engineering最新文献_第3页

Hot Spot Induced Thermal Runaway Map for Polymerization Reactors 聚合反应器的热点诱发热失控图

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-10-29 DOI: 10.1002/mren.202400026

Elijah Yoder, Wayne Strasser, Robert Kacinski, Braden Jones

引用次数: 0

Design and Control of Polymeric Network Architectures Based on Network Dimension Theory 基于网络维数理论的聚合物网络结构设计与控制

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":"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.","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}

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Structural Evolution of Microgels During Precipitation Polymerization Revealed by Light Scattering and Electrophoresis 光散射和电泳研究微凝胶在沉淀聚合过程中的结构演变

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

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Kinetic Investigation of the Emulsion Polymerization of Vinylidene Fluoride 偏氟乙烯乳液聚合动力学研究

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, Azzurra Agostini, Isabelle Chaduc, Giulio Brinati, Bradley Kent, Giuseppe Storti, Mattia Sponchioni","doi":"10.1002/mren.202400023","DOIUrl":"https://doi.org/10.1002/mren.202400023","url":null,"abstract":"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.","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

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

引用次数: 0

Poly(butylene succinate) Microparticles Prepared Through Green Suspension Polycondensations 通过绿色悬浮缩聚法制备聚丁二酸丁二醇酯微粒

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-10-15 DOI: 10.1002/mren.202400022

Jéssica Bentes, Luciana Dutra, Ariane de J. Sousa-Batista, José Carlos Pinto

{"title":"Poly(butylene succinate) Microparticles Prepared Through Green Suspension Polycondensations","authors":"Jéssica Bentes, Luciana Dutra, Ariane de J. Sousa-Batista, José Carlos Pinto","doi":"10.1002/mren.202400022","DOIUrl":"https://doi.org/10.1002/mren.202400022","url":null,"abstract":"The demand for sustainable polymer particles production is growing, driven by the need for efficient, biocompatible, and biodegradable materials. In this context, the present study explores the production of poly(butylene succinate) (PBS) particles in a single step using a green heterogeneous suspension process, using vegetable oil as the suspending medium. Particularly, the effects of oil type (soybean, corn, sunflower), dispersed phase holdup (10–30 wt.%), stabilizers (Span 20, Span 80, Tween 80, Brij 52, Brij 93, Igepal-co-520, Polyglycerol polyricinoleate (PGPR)), reaction time (1–5 h), and temperature (100–160 °C) on the suspension polymerization are investigated. Results indicate that particle size and shape are influenced by the vegetable oil and stabilizer. Additionally, it is shown that the particle size distribution is affected by the use of a sonicator, allowing the manufacture of even smaller microsized particles. Based on the results, a 30 wt.% holdup in corn oil with a blend of surfactants can be recommended, producing spherical particles with an average diameter of 100 µm. Moreover, higher reaction temperatures (160 °C) and longer reaction times (5 h) positively impacted the molar mass of the obtained particles. Finally, cytotoxicity tests using Bone Marrow-Derived Macrophages cells confirmed the safe use of PBS microparticles at concentrations up to 1000 µg mL⁻¹","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"18 6","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861354","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

Monomer Transport via Collision in Emulsion Polymerization 乳液聚合中单体碰撞输运

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-10-15 DOI: 10.1002/mren.202400030

F. Joseph Schork

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Monomer Transport by Collisions in (Mini) Emulsion Polymerization, a Personal Perspective 微型）乳液聚合中单体的碰撞迁移，个人视角

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-09-03 DOI: 10.1002/mren.202400013

Alexander M. van Herk

{"title":"Monomer Transport by Collisions in (Mini) Emulsion Polymerization, a Personal Perspective","authors":"Alexander M. van Herk","doi":"10.1002/mren.202400013","DOIUrl":"10.1002/mren.202400013","url":null,"abstract":"Transport of monomer from droplets to growing latex particles in emulsion polymerization in general is assumed to proceed via diffusion through the aqueous phase. Especially in miniemulsion polymerizations the direct transfer of very hydrophobic species from droplet to droplet is assumed to also proceed via collisions. Amongst the hydrophobic species where this is shown to play a role are monomers, initiators, inhibitors and (catalytic) chain transfer agents. It is well known that the reactor geometry and the stirring speed can have a profound effect on emulsion polymerizations. The 1972 paper of Nomura on the effect of stirring on emulsion polymerization is cited more than 100 times and until today keeps scientists intrigued. Diffusion limitations of monomer going from the droplet into the aqueous phase can occur for very hydrophobic monomers. The alternative route of transport via collisions is often not considered. In this perspective, paper will discuss the evidence for collision based transfer in miniemulsion polymerization and also consider whether collision based monomer transport can play a role in regular emulsion polymerizations.","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mren.202400013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208552","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. 4/2024 封面：Macromol.React.Eng.4/2024

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-08-18 DOI: 10.1002/mren.202470007

引用次数: 0