Macromolecular Chemistry and Physics最新文献_第2页

Phenolic Resins with Semi-Rigid Polymer Backbones Exhibiting LCST-Type Phase Separations in the Mixtures of Alcohols and Non-Polar Solvents 在醇类和非极性溶剂混合物中显示 LCST 型相分离的具有半刚性聚合物骨架的酚醛树脂

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-22 DOI: 10.1002/macp.202400460

Natsuki Inaba, Koki Takasu, Keitaro Matsuoka, Kazuki Sada

{"title":"Phenolic Resins with Semi-Rigid Polymer Backbones Exhibiting LCST-Type Phase Separations in the Mixtures of Alcohols and Non-Polar Solvents","authors":"Natsuki Inaba, Koki Takasu, Keitaro Matsuoka, Kazuki Sada","doi":"10.1002/macp.202400460","DOIUrl":"https://doi.org/10.1002/macp.202400460","url":null,"abstract":"Research on lower critical solution temperature (LCST)-type thermo-responsive polymers has predominantly focused on those with flexible backbones, such as vinyl polymers, while rigid polymers have rarely been investigated due to their low solubility. Although some molecular designs for aqueous systems have been reported, molecular designs in organic media remain unclear due to the difficulty in achieving soluble states at low temperatures. The previous study demonstrates the molecular design for LCST-type phase separation in organic media based on the control of the solvation through the construction/deconstruction of hydrogen bonds, but only flexible vinyl polymers such as poly(4-hydroxystyrene) are investigated. In this study, it is aimed to extend the molecular design to rigid phenolic resins, TD-2131 and KA-1160, which contain phenolic groups in the main chain. TD-2131 and KA-1160 exhibited LCST-type phase separation in the mixture of 1-alcohol such as 1-hexanol and 1-octanol as hydrogen-bonding solvents and toluene or cyclohexane as non-polar solvents in appropriate mixing molar ratios. In mixtures of 1-alcohols and non-polar solvents, shorter-chain 1-alcohols necessitate higher molar ratios, while longer-chain 1-alcohols require lower ratios to induce LCST-type phase separations. These solubility trends mirror that observed in poly(4-hydroxystyrene), suggesting that the molecular design applies to both flexible and rigid polymer backbones.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Fabrication and Characterization of Multi-Stimuli-Responsive Hydrogels with Robust Mechanical Properties, Good Self-Healing, and Substrate Adhesiveness Using a Traditional Chemical Crosslinker and Initiator-Free Approach 采用传统化学交联剂和无引发剂方法制备具有稳健机械特性、良好自愈合性和基底粘附性的多刺激响应水凝胶并确定其特性

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-22 DOI: 10.1002/macp.202400471

Mulenga Kalulu, Olayinka Oderinde, Christopher Mwanza, Shephrah O. Ogungbesan, Muzammal Hussain, Guodong Fu

{"title":"Fabrication and Characterization of Multi-Stimuli-Responsive Hydrogels with Robust Mechanical Properties, Good Self-Healing, and Substrate Adhesiveness Using a Traditional Chemical Crosslinker and Initiator-Free Approach","authors":"Mulenga Kalulu, Olayinka Oderinde, Christopher Mwanza, Shephrah O. Ogungbesan, Muzammal Hussain, Guodong Fu","doi":"10.1002/macp.202400471","DOIUrl":"https://doi.org/10.1002/macp.202400471","url":null,"abstract":"Hydrogels are essential in various applications, including biomedical fields, robotics, sensors, and wearable technologies. Traditional fabrication methods often involve chemical crosslinkers and initiators, which can introduce toxicity and limit practical use. This study presents an innovative approach to creating multifunctional, multi-stimuli-responsive hydrogels without using these traditional components. By polymerizing AMPS, DMAA, and MAA monomers using environmentally friendly AlCl3·6H2O as a crosslinker via UV polymerization, the study produces hydrogels exhibiting good mechanical properties such as tensile strength (3.02 ± 0.12 MPa), toughness (20.01 ± 1.8 J m−3), superior stretchability (2182.4 ± 114% elongation), and good compression resistance in addition to possessing self-healing capabilities, ionic conductivity, and responsiveness to temperature, pH, and ionic strength. This innovative technique represents a significant advancement toward developing sustainable hydrogels suitable for diverse biomedical, robotic, and sensor, technology applications.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Modafinil Synthesis Using an Eosin Y-photocatalytic Gel Formed by Autocatalyzed Thiol-Ene Crosslinking

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202400468

Timothy Schmitt, Christian W. Pester

{"title":"Modafinil Synthesis Using an Eosin Y-photocatalytic Gel Formed by Autocatalyzed Thiol-Ene Crosslinking","authors":"Timothy Schmitt, Christian W. Pester","doi":"10.1002/macp.202400468","DOIUrl":"https://doi.org/10.1002/macp.202400468","url":null,"abstract":"Utilizing visible wavelength photons to drive chemical transformations in photocatalysis has become increasingly popular due to the promise of sustainability, safety, and modularity. Heterogeneous photocatalysis further allows for simplified separation and reuse of photocatalysts from reaction systems. Described herein is a proof-of-concept for a heterogeneous catalysis platform based on an Eosin Y photocatalyst network (EY-gel) formed by an autocatalyzed thiol-ene crosslinking reaction. The Eosin Y photocatalyst is modified with an acrylate handle, allowing for both catalysis of and participation in the thiol-ene crosslinking reaction, thus incorporating the catalyst into the gel framework. The produced EY-gel takes the form of micron-sized spherical particles due to the use of a relative non-solvent for the gel components during the crosslinking reaction, allowing for collection through simple filtration. The EY-gel is shown to be effective for the synthesis of the narcolepsy drug Modafinil via the oxidation of 2-[(diphenylmethyl)thio]acetamide, and also shows modest recyclability over multiple use cycles.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Search for Thiol-Protected Gold Clusters Doped with Different Elements Using Dendrimers

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202570009

Hisanori Muramatsu, Tetsuya Kambe, Takamasa Tsukamoto, Takane Imaoka, Kimihisa Yamamoto

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Recent Advances in Polymer Nanofibers for Optoelectronics Applications

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Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202400465

Sai Sun, Ting Kuang, Jinyong Li, Bin Zhang

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Luminescent Hybrid Material Based on the Europium(III)–β-Diketone Complex Doped with Smectite

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Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202570007

Rong Cao, Ryota Nishiyama, Kazuki Nakamura, Norihisa Kobayashi

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Frontiers of Functional Polymer Materials: In Honor of Prof. Nishide's 77th Birthday

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Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202400518

Kenichi Oyaizu, Takeo Suga, Rigoberto C. Advincula

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High Refractive Index Aromatic and Ether-Containing Polythioureas: Improving Transparency and Mechanical Properties via Reciprocal Hydrogen Bonds

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202400456

Seigo Watanabe, Yoshino Tsunekawa, Kenichi Oyaizu

{"title":"High Refractive Index Aromatic and Ether-Containing Polythioureas: Improving Transparency and Mechanical Properties via Reciprocal Hydrogen Bonds","authors":"Seigo Watanabe, Yoshino Tsunekawa, Kenichi Oyaizu","doi":"10.1002/macp.202400456","DOIUrl":"https://doi.org/10.1002/macp.202400456","url":null,"abstract":"A series of aromatic-aliphatic polythiourea copolymers bearing highly polarizable poly(4,4′-phenylsulfide thiourea) and hydrogen bond (H-bond) acceptor poly(ether thiourea) units are synthesized. The copolymers are highly refractive (nD = 1.78 at maximum) as a result of high sulfur content and lack of crystallinity and exhibit improved visible transparency (over 95%T in 1 µm thickness) compared to all-aromatic polythioureas. Further, the copolymers display higher fracture strength upon introducing 20–25 mol% of the poly(ether thiourea) unit, despite the inherent flexibility of ether groups. A detailed spectroscopic investigation indicates that this unique toughening behavior is attributed to the reciprocal (well compatible) intermolecular H-bonds intersected between aromatic and aliphatic thiourea moieties, as well as dynamic H-bond slipping/swapping between ether units and thiourea counterparts during the stretching process. These findings provide a rational strategy for simultaneously satisfying superior optical and mechanical properties, broadly applicable to various H-bond containing high refractive index polymers.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/macp.202400456","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Issue Information: Macromol. Chem. Phys. 4/2025

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Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202570008

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Correlating Formulation and Performance in All-Acrylic Waterborne Pressure Sensitive Adhesive Latexes

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2025-02-20 DOI: 10.1002/macp.202400475

Julie Bratasanu, Victoria Aguilar, Leila Issoufou Alfari, Mathieu Leocmach, Benoit Mahler, Eric Drockenmuller, Elodie Bourgeat-Lami, Matteo Ciccotti, Costantino Creton, Damien Montarnal

{"title":"Correlating Formulation and Performance in All-Acrylic Waterborne Pressure Sensitive Adhesive Latexes","authors":"Julie Bratasanu, Victoria Aguilar, Leila Issoufou Alfari, Mathieu Leocmach, Benoit Mahler, Eric Drockenmuller, Elodie Bourgeat-Lami, Matteo Ciccotti, Costantino Creton, Damien Montarnal","doi":"10.1002/macp.202400475","DOIUrl":"https://doi.org/10.1002/macp.202400475","url":null,"abstract":"This work investigates the correlation between the formulation of waterborne acrylic pressure-sensitive adhesives (PSAs) and their resulting adhesive performance. A library of n-butyl acrylate-based latexes is synthesized via miniemulsion polymerization. Controlled variations in the composition of these polyacrylates – such as the inclusion of rigid comonomers, latent crosslinkers and chain transfer agents – enabled precise control over key network structures in the particles leading then to a range of physical parameters in the cast PSA films such as the glass transition temperature, entanglement and crosslink density. The viscoelastic and mechanical behaviors of the resulting networks are carefully characterized using a combination of techniques, including linear rheology, dynamic mechanical analysis, and tensile testing. These properties are then correlated with adhesive performance, as measured by probe tack and shear holding time tests. This comprehensive approach allowed for the identification of the optimal formulation balance that delivers the best compromises of adhesive performance, directly correlating these outcomes with the macromolecular design.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"226 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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