{"title":"On the First Anniversary of the Death of Professor Mamoru Nomura","authors":"","doi":"10.1002/mren.202400042","DOIUrl":"https://doi.org/10.1002/mren.202400042","url":null,"abstract":"","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431660","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":"Environmentally Friendly Synthesis of Polymer Nanoparticles in a Packed Reactor Using Glass Beads","authors":"Tetsuya Yamamoto, Ayumi Morino, Hideki Kanda, Ayumu Seki, Toru Ishigami","doi":"10.1002/mren.202570001","DOIUrl":"https://doi.org/10.1002/mren.202570001","url":null,"abstract":"<p><b>Front Cover</b>: Micro glass beads make the reaction spaces to synthesize polymer nano particles without surfactant. Particle size is controllable by the size of the micro glass beads packed in the reactor. More details can be found in article 2400009 by Tetsuya Yamamoto and co-workers.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mren.202570001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431658","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}
{"title":"Special Issue Dedicated to the Memory of Professor Mamoru Nomura who Passed Away on October 29, 2023","authors":"Hidetaka Tobita","doi":"10.1002/mren.202400041","DOIUrl":"https://doi.org/10.1002/mren.202400041","url":null,"abstract":"","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431659","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":"Kinetics Dependence of RAFT Emulsion Polymerization of 2-Ethylhexyl Acrylate on Initiator Concentrations","authors":"Huanxin Ni, Yingwu Luo","doi":"10.1002/mren.202400051","DOIUrl":"https://doi.org/10.1002/mren.202400051","url":null,"abstract":"<p>Reversible addition-fragmentation chain transfer (RAFT) emulsion polymerization with a well-designed amphiphilic macroRAFT agent as a surfactant has been well-developed as a powerful tool to synthesize high molecular weight multiblock copolymers. However, the polymerization kinetics research has been mostly limited to styrene polymerization. It has been reported that the dependence of the particle number on initiator concentration is described by <i>N<sub>p</sub></i>∝[I]<sup>−0.4</sup> in amphiphilic macroRAFT-mediated emulsion polymerization of styrene, which surprisingly deviates from the classical Smith–Eward equation. In the current study, the dependence of polymerization kinetics on the initiator concentration in the RAFT emulsion polymerization of 2-ethylhexyl acrylate (EHA) is investigated. It is revealed that the dependence of the particle number on initiator concentration (<i>N<sub>p</sub></i>∝[I]<sup>−0.29</sup>) is similar to that of styrene but the exponent is less. Additionally, compared to styrene polymerization, the inhibition period in EHA polymerization is significantly extended due to the much lower water-solubility of EHA.</p>","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144299944","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":"Free Radical Entry in Emulsion Polymerization: A Comprehensive Theory","authors":"Jorge Herrera-Ordonez","doi":"10.1002/mren.202400047","DOIUrl":"https://doi.org/10.1002/mren.202400047","url":null,"abstract":"<p>A comprehensive mathematical model for radical entry into polymer particles is proposed that includes equations and various mechanistic precepts from several works, including those of the author. The model allows estimating the contribution of the different initiator-derived radicals to the overall particle entry rate (<i>ρ</i>). The results of the model are consistent with experimental data reported in the literature. Contrary to what is established by one of the most accepted theories, it is obtained that: 1) the determining step of the entry of water-soluble oligoradicals is not their propagation in the aqueous phase but rather their diffusion and subsequent irreversible adsorption on the particles; 2) primary particles can also enter (coagulate) and contribute to the <i>ρ</i> value; 3) the electrostatic repulsion between oligoradicals and charged particles plays a very important role in determining the predominant species entering the particles.</p>","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mren.202400047","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144299600","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}