Macromolecular Reaction Engineering最新文献

Front Cover: Macromol. React. Eng. 2/2025 封面：Macromol。反应。Eng。2/2025

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2025-04-17 DOI: 10.1002/mren.202570003

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Issue Information: Macromol. React. Eng. 2/2025 发布信息：Macromol。反应。Eng。2/2025

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2025-04-17 DOI: 10.1002/mren.202570004

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On the First Anniversary of the Death of Professor Mamoru Nomura 纪念野村守教授逝世一周年

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2025-02-17 DOI: 10.1002/mren.202400042

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Issue Information: Macromol. React. Eng. 1/2025 发布信息：Macromol。反应。Eng。1/2025

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2025-02-17 DOI: 10.1002/mren.202570002

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Environmentally Friendly Synthesis of Polymer Nanoparticles in a Packed Reactor Using Glass Beads 利用玻璃微珠在填充反应器中环保合成聚合物纳米颗粒

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2025-02-17 DOI: 10.1002/mren.202570001

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

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Special Issue Dedicated to the Memory of Professor Mamoru Nomura who Passed Away on October 29, 2023 纪念2023年10月29日逝世的野村守教授特刊

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Macromolecular Reaction Engineering Pub Date : 2025-02-17 DOI: 10.1002/mren.202400041

Hidetaka Tobita

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Preparation of High-Heat-Resistant Silicone Hollow Particles 高耐热硅树脂中空颗粒的制备

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-12-23 DOI: 10.1002/mren.202400046

Hyota Nishi, Shintaro Ishidate, Ryuta Amasaki, Reina Nakamoto, Shinya Katsube, Nozomu Suzuki, Toyoko Suzuki, Hideto Minami

{"title":"Preparation of High-Heat-Resistant Silicone Hollow Particles","authors":"Hyota Nishi, Shintaro Ishidate, Ryuta Amasaki, Reina Nakamoto, Shinya Katsube, Nozomu Suzuki, Toyoko Suzuki, Hideto Minami","doi":"10.1002/mren.202400046","DOIUrl":"https://doi.org/10.1002/mren.202400046","url":null,"abstract":"Single hollow particles are used in various fields, particularly in thermal insulation materials, owing to their low thermal conductivity attributed to encapsulated air properties. “The self-assembling phase separated polymer (SaPSeP) method” is an original hollowing method that is proposed by this laboratory 25 years ago. Most hollow particles prepared by the SaPSeP method have carbon, oxygen, and hydrogen polymer shells, which lack sufficient heat resistance. In this study, hollow particles with a silicone shell, which is highly heat-resistant, are prepared using the SaPSeP method using a trimer of 3-methacryloxypropylmethyldimethoxysilane (MPDS). The MPDS trimer (3MPDS) is synthesized through the sol–gel reaction of MPDS with a basic aqueous solution. Additionally, hollow particles are prepared using a new silicone oligomer composed of MPDS and dimethoxymethylvinylsilane (DMVS). Both hollow particles prepared from 3MPDS and from a new silicone oligomer composed of MPDS and DMVS showed high heat resistance. They maintained their hollow structure even when exposed to temperatures up to 900 °C.","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431488","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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Preparation of Monodisperse Cross-Linked Elastic Silicone Particles 单分散交联弹性硅微粒的制备

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-12-20 DOI: 10.1002/mren.202400037

Reina Nakamoto, Yuya Takeuchi, Yohei Okubo, Keisuke Fujita, Toyoko Suzuki, Hideto Minami

{"title":"Preparation of Monodisperse Cross-Linked Elastic Silicone Particles","authors":"Reina Nakamoto, Yuya Takeuchi, Yohei Okubo, Keisuke Fujita, Toyoko Suzuki, Hideto Minami","doi":"10.1002/mren.202400037","DOIUrl":"https://doi.org/10.1002/mren.202400037","url":null,"abstract":"Micrometer-sized monodisperse silicone droplets are prepared through a sol–gel process involving 3-methacryloxypropylmethyldimethoxysilane (MPDS) at room temperature for 1.5 h in the presence of NH3 as a catalyst. The size of the obtained droplets is controlled by changing the stabilizer concentration and solvent polarity. However, the obtained droplets have not maintained their particulate shape in the dry state due to the absence of a cross-linking structure. Thus, radical polymerization is performed on the obtained silicone droplets at 70 °C for 2 h; consequently, spherical particles with high monodispersity are observed in the dry state, indicating the presence of a cross-linked structure. Microcompression tests are conducted to evaluate the mechanical properties of the silicone particles. Initially, the recovery ratio (elasticity) is not high because the molecular weight of the silicone particles is low, ≈600, due to MPDS cyclization (MPDS trimer). Anionic ring-opening polymerization is therefore performed to extend the molecular weight of the MPDS trimer. Benzyldodecyldimethylammonium bromide and tetrakis[tris(dimethylamino)phosphoranylidenamino]phosphonium chloride are used as catalysts for anionic ring-opening polymerization. These catalysts increased the molecular weight to ≈2000 and 7600, respectively. Furthermore, the silicone particles obtained through anion ring-opening polymerization and radical polymerization have high recovery ratios (elasticity).","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431468","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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Industrial Synthesis of Linear Low-Density Polyethylene with H-Shape Long-Chain-Branching Structures Using Ziegler-Natta Catalysts 使用齐格勒-纳塔催化剂工业合成具有 H 型长链分支结构的线性低密度聚乙烯

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-12-20 DOI: 10.1002/mren.202400044

Bingyu Zhang, Fengtao Chen, Jin-Yong Dong

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Kinetics of the Aqueous-Phase Copolymerization of AA and HPEG Macromonomer in Acidic Media 酸性介质中AA与HPEG大单体水相共聚动力学研究

IF 1.8 4区工程技术

Macromolecular Reaction Engineering Pub Date : 2024-12-20 DOI: 10.1002/mren.202400043

Kevin Palma-Lemus, Shaghayegh Hamzehlou, Vincent Froidevaux, Pascal Boustingorry, Jose Ramon Leiza

{"title":"Kinetics of the Aqueous-Phase Copolymerization of AA and HPEG Macromonomer in Acidic Media","authors":"Kevin Palma-Lemus, Shaghayegh Hamzehlou, Vincent Froidevaux, Pascal Boustingorry, Jose Ramon Leiza","doi":"10.1002/mren.202400043","DOIUrl":"https://doi.org/10.1002/mren.202400043","url":null,"abstract":"Water-soluble monomers are extensively used in the production of polymeric materials in aqueous media for various applications. Acrylic acid–polyethylene glycol 2-methyl-2-propenyl ether (AA-HPEG) copolymers belong to the class of comb-like polycarboxylate ether (PCE) polymers, employed as superplasticizers for cementitious materials. Due to different reactivity ratios of AA and HPEG, semibatch operations with optimized monomer addition profiles are required to enhance the incorporation of HPEG into the copolymer. The kinetics of this system is complex and, like other water-soluble monomers, depends on monomer concentration, pH, and ionic strength. Despite its high-volume industrial usage, the kinetics of this system have received little attention in the literature. Furthermore, the presence of the HPEG, with 55 ethylene oxide (EO) units in the side chain, complicates the precise determination of individual monomer conversions. To address this, various characterization methods are evaluated, including proton nuclear magnetic resonance (1H-NMR) and size-exclusion chromatography (SEC). Results show that HPEG conversion is determined more accurately using 1H-NMR signals from the polymer than unreacted monomer signals or SEC traces. Aqueous semibatch AA-HPEG copolymerization experiments are conducted in acidic media to investigate the effects of comonomer feeding time, initiator and chain-transfer agent concentrations on the copolymerization kinetics, HPEG incorporation, and molar mass.","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mren.202400043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431470","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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