Macromolecular Reaction Engineering最新文献_第4页

Masthead: Macromol. React. Eng. 4/2024 刊头：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.202470008

引用次数: 0

Tailoring Polyaniline for Improved Acetaldehyde Detection 为改进乙醛检测而定制聚苯胺

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-08-16 DOI: 10.1002/mren.202400018

Bhoomi Het Mavani, Alexander Penlidis

引用次数: 0

Determining the Kinetic and Thermodynamic Parameters of Anionic Polymerization of Styrene Using Linear Free-Energy Relationship 利用线性自由能关系确定苯乙烯阴离子聚合的动力学和热力学参数

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-08-09 DOI: 10.1002/mren.202400021

Shen Li, Zhong-Xin Liu, Yin-Ning Zhou, Zheng-Hong Luo

{"title":"Determining the Kinetic and Thermodynamic Parameters of Anionic Polymerization of Styrene Using Linear Free-Energy Relationship","authors":"Shen Li, Zhong-Xin Liu, Yin-Ning Zhou, Zheng-Hong Luo","doi":"10.1002/mren.202400021","DOIUrl":"10.1002/mren.202400021","url":null,"abstract":"The effect of solvents on kinetic parameters of anionic polymerization is complex and a comprehensive theoretical study has been rare. In this work, four solvent polarity descriptors (i.e., polarizability, dipole moment, nucleophilic index, electrophilic index) are correlated with solvent parameters (Ea, A, ΔH‡, and ΔS‡) by multiple linear regression using the Catalan linear free-energy relationship (LFER) equation for the anionic polymerization of styrene. The results show that Ea, ΔH‡, and ΔS‡ have a low correlation with dipole moment, whereas A is strongly correlated with dipole moment. Given the fact that the larger A the larger effective collision frequency Z, it is hypothesized that in polar solvents, the polymer chains are more extended, enabling more effective collisions between monomers and active anionic species during polymerization. In contrast, in nonpolar solvents, the polymer chains collapse, making it more difficult for the monomer to be inserted into the ion pairs. Subsequently, n-pentane and tetrahydrofuran are chosen as representatives to confirm this conjecture by molecular simulations. Lastly, Ea, A and kp are predicted for 173 solvents using well-established descriptive relationships.","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"18 6","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141922999","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

On the Mechanism of Nucleation and Monomer Transport in Inverse Emulsion Polymerization 论逆乳液聚合中的成核和单体迁移机理

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-08-03 DOI: 10.1002/mren.202400017

F. Joseph Schork

引用次数: 0

Bio-Inspired Polydiacetylene Vesicles for Controlling Stimulus Sensitivity 用于控制刺激灵敏度的生物启发聚二乙烯囊泡

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-07-29 DOI: 10.1002/mren.202400016

Shota Nakayama, Keishi Suga, Tatsuya Kamata, Kanako Watanabe, Hikaru Namigata, Tom A. J. Welling, Daisuke Nagao

{"title":"Bio-Inspired Polydiacetylene Vesicles for Controlling Stimulus Sensitivity","authors":"Shota Nakayama, Keishi Suga, Tatsuya Kamata, Kanako Watanabe, Hikaru Namigata, Tom A. J. Welling, Daisuke Nagao","doi":"10.1002/mren.202400016","DOIUrl":"10.1002/mren.202400016","url":null,"abstract":"Polydiacetylene (PDA) is a kind of photopolymerizable polymer, which exhibits a unique color transition in response to external stimuli such as heat, pH, and solvent. PDAs are attractive as eye-detection stimulus sensors with excellent time performance; however, the sensitivity of PDAs should be improved. Considering the biological membrane-like structure of diacetylene (DA) vesicles, their modification by incorporating membrane lipids (e.g., diacylphosphocholine, PC) can be used to control the membrane fluidity, and consequently molecular ordering of DAs in the vesicle. Inspired by biological membrane systems, lipid vesicles are employed as platforms to generate PDA, and essential factors that influence the sensitivity of PDA are investigated. By lowering the polymerization temperature, the generation of PDA becomes slower, while the sensitivity improves. By adding PCs at the molar ratio of lipid:DA = 1:1, the sensitivity of PDA can be varied: the PCs with lower phase transition temperatures (Tm) made PDA insensitive, while the PCs with higher Tm improved the sensitivity as compared to pure poly(PCDA). It is concluded that the photopolymerization of DAs with a lower membrane fluidity induces highly sensitive PDA, while the photopolymerization of DAs with a higher membrane fluidity induces insensitive PDA with robustness toward stimuli.","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mren.202400016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141871416","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. 3/2024 刊头：Macromol.React.Eng.3/2024

IF 1.5 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-06-18 DOI: 10.1002/mren.202470006

引用次数: 0

Polymer Versus Polymerization Fouling: Basic Deposition Mechanisms During Emulsion Polymerization by the Example of a Vinyl Acetate and Versa 10 Copolymer 聚合物与聚合污垢：以醋酸乙烯酯和 Versa 10 共聚物为例，说明乳液聚合过程中的基本沉积机制

IF 1.5 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-06-18 DOI: 10.1002/mren.202470005

Annika Klinkert, Zoe Friedrich, Elisabeth Glatt, Wolfgang Augustin, Stephan Scholl

引用次数: 0

Application of Network Dimension Theory to the Kinetics of Nanogel Formation in Miniemulsion Vinyl/Divinyl Copolymerization: Free-Radical and Living Polymerization 网络尺寸理论在乙烯基/二乙烯基共聚微乳液纳米凝胶形成动力学中的应用：自由基和活聚合

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-06-10 DOI: 10.1002/mren.202400014

Hidetaka Tobita

{"title":"Application of Network Dimension Theory to the Kinetics of Nanogel Formation in Miniemulsion Vinyl/Divinyl Copolymerization: Free-Radical and Living Polymerization","authors":"Hidetaka Tobita","doi":"10.1002/mren.202400014","DOIUrl":"10.1002/mren.202400014","url":null,"abstract":"In vinyl/divinyl copolymerization, a crosslink is formed by the reaction between an active center and a pendant double bond. When both the active center and the pendant double bond are located within the same polymer molecule, the cyclization occurs, which is ineffective for growth in molecular weight. In the present model, the network dimension theory is applied to estimate the mean-square radius of gyration for the growing polymer molecule, which is used to account for the enrichment effect of pendant double bonds around the active center for the cyclization reaction. The model is applied to the miniemulsion copolymerization, and both conventional free-radical polymerization and ideal living polymerization are considered. Some of important characteristics of network architecture formed in these two types of polymerization mechanisms that cannot be predicted based on the classical chemical kinetics can be reproduced by the model, such unique characteristics as the pendant double bonds are consumed from the beginning of polymerization in the conventional free-radical polymerization but not so in the living polymerization. The present model provides useful insights into the size and structural dependent network formation kinetics without relying on the lattice model.","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mren.202400014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141362715","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

Environmentally Friendly Synthesis of Polymer Nanoparticles in a Packed Reactor Using Glass Beads 使用玻璃珠在填料反应器中以环保方式合成聚合物纳米颗粒

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-05-09 DOI: 10.1002/mren.202400009

Tetsuya Yamamoto, Ayumi Morino, Hideki Kanda, Ayumu Seki, Toru Ishigami

引用次数: 0

What Can Industrial Catalytic Olefin Polymerization Plants Tell Us About Reaction Kinetics? From Production Rate and Residence Time to Catalyst Reaction Performance. 工业催化烯烃聚合装置对反应动力学有何启示？从生产率和停留时间到催化剂反应性能。

IF 1.5 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-04-18 DOI: 10.1002/mren.202470003

Vasileios Touloupidis, João B. P. Soares

引用次数: 0