Macromolecular Chemistry and Physics最新文献_第7页

Recognized Ionic Structures in Large Dimension of Graft-type Polymer Electrolyte Membranes Using Pair Distribution Function Expanded for Small Angle X-Ray Scattering 利用小角 X 射线散射的对分布函数扩展识别接枝型聚合物电解质膜大尺寸中的离子结构

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-15 DOI: 10.1002/macp.202400149

Nguyen Manh Tuan, Nguyen Huynh My Tue, Vo Thi Kim Yen, Nguyen Nhat Kim Ngan, Huynh Truc Phuong, Vinh Nguyen Thanh Pham, Le Quang Luan, Pham Thi Thu Hong, Tran Van Man, Tran Duy Tap

{"title":"Recognized Ionic Structures in Large Dimension of Graft-type Polymer Electrolyte Membranes Using Pair Distribution Function Expanded for Small Angle X-Ray Scattering","authors":"Nguyen Manh Tuan, Nguyen Huynh My Tue, Vo Thi Kim Yen, Nguyen Nhat Kim Ngan, Huynh Truc Phuong, Vinh Nguyen Thanh Pham, Le Quang Luan, Pham Thi Thu Hong, Tran Van Man, Tran Duy Tap","doi":"10.1002/macp.202400149","DOIUrl":"10.1002/macp.202400149","url":null,"abstract":"This study reports the pair distribution function (PDF) analysis of combined wide- and small-angle X-ray scattering (WAXS/SAXS) profiles of poly(styrene sulfonic acid) (PSSA) grafted poly(ethylene-co-tetrafluoroethylene) polymer electrolyte membranes (ETFE-PEMs) within a wide grafting degree (GD) of 0%–117%. The PDF analysis of WAXS profiles (from Cu-Kα1 radiation) provides a measure in size of the crystallite domains (5.1–8.7 nm). The extension of the PDF analysis for only SAXS profiles shows the distances of crystallite layers of 25.1–32 nm. In particular, SAXS-PDF analysis is effective in showing the existence of newly generated graft domains with distances ≈60–64 nm, which can not be determined previously by the conventional SAXS analysis. The high similarity in local and higher-order structures observed for polystyrene grafted ETFE films and ETFE-PEMs suggests that the hierarchical structures including the spatial arrangement of large amorphous contents in the membranes can be determined at the graft polymerization step. Note that the presence of newly generated PSSA graft domains at large dimension can explain well the comparable or higher proton conductivity of ETFE-PEMs as compared with commercial Nafion membrane.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 19","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141645734","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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Sustainable Light‐Assisted 3D Printing of Bio‐Based Microwave‐Functionalized Gallic Acid 可持续光辅助三维打印生物基微波功能化没食子酸

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-15 DOI: 10.1002/macp.202400181

Rossella Sesia, Matilde Porcarello, M. Hakkarainen, S. Ferraris, S. Spriano, Marco Sangermano

{"title":"Sustainable Light‐Assisted 3D Printing of Bio‐Based Microwave‐Functionalized Gallic Acid","authors":"Rossella Sesia, Matilde Porcarello, M. Hakkarainen, S. Ferraris, S. Spriano, Marco Sangermano","doi":"10.1002/macp.202400181","DOIUrl":"https://doi.org/10.1002/macp.202400181","url":null,"abstract":"The development of 3D printing technologies and the requirement for more sustainable 3D printing materials is constantly growing. However, ensuring both sustainability and performance of the new materials is crucial to replace current fossil‐based polymers. Here, a bio‐based UV‐curable resin is produced in high yield from gallic acid (GA), a natural polyphenolic compound, by means of rapid and efficient microwave‐assisted methacrylation (5 min heating time and 10 min at 130 °C). The successful microwave‐assisted methacrylation with a high degree of substitution is confirmed by Fourier transform infrared (FTIR) spectroscopy and proton nuclear magnetic resonance spectroscopy. The radical UV‐photopolymerization of the methacrylated gallic acid (MGA) is further investigated by real‐time FTIR and differential scanning photo calorimetry (photo‐DSC) analyses, clearly demonstrating the high photo‐reactivity of MGA. Moreover, the %gel assessment demonstrates the formation of highly insoluble fractions after the UV‐curing, with 98% gel content. The photo‐rheology and rheology support the suitability of MGA for light‐assisted 3D printing. Indeed, a honeycomb and a hollow cube are 3D printed by means of the digital light processing 3D printing technique with high accuracy in a small scale. Finally, the cured‐MGA illustrates high Tg and thermal stability.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"53 11","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141648726","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}

引用次数: 0

Initiator-Free Synthesis of Semi-Interpenetrating Polymer Networks via Bergman Cyclization 通过伯格曼环化无引发剂合成半互穿聚合物网络

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-15 DOI: 10.1002/macp.202400177

Yue Cai, Florian Lehmann, Justus F. Thümmler, Dariush Hinderberger, Wolfgang H. Binder

{"title":"Initiator-Free Synthesis of Semi-Interpenetrating Polymer Networks via Bergman Cyclization","authors":"Yue Cai, Florian Lehmann, Justus F. Thümmler, Dariush Hinderberger, Wolfgang H. Binder","doi":"10.1002/macp.202400177","DOIUrl":"10.1002/macp.202400177","url":null,"abstract":"Semi-interpenetrating polymer networks (semi-IPNs), composed of two or more polymers, forming intertwined network-architectures, represent a significant type of polymer combination in modern industry, especially in automotive and medical devices. Diverse synthesis techniques and plentiful raw materials highlight semi-IPNs in providing facile modifications of properties to meet specific needs. An initiator-free synthesis of semi-interpenetrating polymer networks via Bergman cyclization (BC) is reported here, acting as a trigger to embed a second polymer via its reactive enediyne (EDY) moiety, then embedded into the first network. (Z)-oct-4-ene-2,6-diyne-1,8-diol (diol-EDY) is targeted as the precursor of the second polymer, swollen into the first polyurethane network (PU), followed by a radical polymerization induced by the radicals formed by the BC. The formation of the semi-IPN is monitored via electron paramagnetic resonance (EPR) spectroscopy, infrared-spectroscopy (FT-IR), and thermal methods (DSC), proving the activation of the EDY-moiety and its subsequent polymerization to form the second polymer. Stress−strain characterization and cyclic stress−strain investigations, together with TGA and DTG analysis, illustrate improved mechanical properties and thermal stability of the formed semi-IPN compared to the initial PU-network. The method presented here is a novel and broadly applicable approach to generate semi-IPNs, triggered by the EDY-activation via Bergman cyclization.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 19","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/macp.202400177","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141645520","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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Amino-containing α-Diimine Nickel Complexes with Adjustable Electronic Properties and their Effective Use in Forming Highly Branched Polyethylene 具有可调电子特性的含氨基 α-二亚胺镍配合物及其在形成高支链聚乙烯中的有效应用

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-15 DOI: 10.1002/macp.202400169

Qiuyue Zhang, Quanchao Wang, Yizhou Wang, Ali Muhammad Ashfaq, Yanping Ma, Tongling Liang, Wen-Hua Sun

{"title":"Amino-containing α-Diimine Nickel Complexes with Adjustable Electronic Properties and their Effective Use in Forming Highly Branched Polyethylene","authors":"Qiuyue Zhang, Quanchao Wang, Yizhou Wang, Ali Muhammad Ashfaq, Yanping Ma, Tongling Liang, Wen-Hua Sun","doi":"10.1002/macp.202400169","DOIUrl":"10.1002/macp.202400169","url":null,"abstract":"A family of ten amino-containing bis(arylimino)acenaphthene-nickel (II) bromide complexes varied in the electronic properties of para-substituents (R = Me, iPr, tBu, OMe, Cl, F, NO2) as well as two amino-free comparators (R = Me, Cl) are synthesized in good yield from their corresponding unsymmetrical N,N’-ligands. All organic compounds are well characterized by different analysis techniques. On activation with Me2AlCl, all nickel complexes exhibit moderate to high activities with a maximum activity up to 14.19 × 106 g (PE) mol−1 (Ni) h−1 and deliver narrow dispersed polyethylene (PDI: 1.85–2.65) with adjustable molecular weight values (Mw: 5.27–18.49 × 105 g mol−1). The presence of remote fluoro- group and (4-amino-3,5-dimethylphenyl)(phenyl)methyl group has their own unique influence on activity due to their different electronic and steric properties. Nevertheless, the latter with higher steric hindrance results in better thermal stability of the current catalytic system. Moreover, all polyethylene is highly branched and exhibits typical characteristics of thermoplastic elastomers, especially good mechanical properties (εb up to 1175%) and elastic recovery rate (up to 86%).","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 19","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141649183","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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Synthesis and Polymerization of the Bio-Benzoxazine Derived from Resveratrol and Thiophenemethylamine and Properties of its Polymer 白藜芦醇和噻吩甲胺衍生生物苯并恶嗪的合成、聚合及其聚合物的特性

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-09 DOI: 10.1002/macp.202400173

Min Zhong, Ren Yin, Zichao Sun, Tianjia Jiang, Weichen Sheng, Kan Zhang

{"title":"Synthesis and Polymerization of the Bio-Benzoxazine Derived from Resveratrol and Thiophenemethylamine and Properties of its Polymer","authors":"Min Zhong, Ren Yin, Zichao Sun, Tianjia Jiang, Weichen Sheng, Kan Zhang","doi":"10.1002/macp.202400173","DOIUrl":"10.1002/macp.202400173","url":null,"abstract":"Resveratrol and 2-thiophenemethylamine have been employed in the synthesis of a novel tri-functional benzoxazine (RES-th) to develop the bio-benzoxazine monomer. The chemical structure of the synthesized monomer is confirmed by various characterization technics. The polymerization behavior is monitored by in situ Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). The in situ FTIR results reveal distinct reaction mechanisms for the three oxazine rings presented in RES-th, with both ether and phenolic Mannich bridge structures observed in the products. The activation energy values of RES-th are calculated to be 119.05, 120.97, and 119.44 kJ mol−1 by Kissinger, Ozawa, and Starink methods, respectively, which are all based on the heat flow curves at various heating temperatures. The thermal stability and flame retardancy of the resulting polybenzoxazine (poly(RES-th)) are investigated by thermogravimetric analysis (TGA) and microscale combustion calorimeter (MCC). The values of Td5 and Td10 of polybenzoxazine are found to be 356 °C and 399 °C, respectively, with a char yield of 66.3% at 800 °C. The prepared polybenzoxazine also demonstrates nonflammability characteristics with the values of heat release capacity (HRC) and total heat release rate (THR) of 18.65 J (g K)−1 and 2.69 kJ g−1, respectively. These findings suggest that the thermoset, poly(RES-th), is a promising candidate for fire-resistant applications.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 19","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141572022","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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Synthesis of High Mechanical Strength and Thermally Recyclable and Reversible Polyurethane Adhesive by Diels–Alder Reaction 通过 Diels-Alder 反应合成高机械强度、可热回收和可逆的聚氨酯粘合剂

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-09 DOI: 10.1002/macp.202400199

Jian Xi, Niangui Wang

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Masthead: Macromol. Chem. Phys. 13/2024 刊头：Macromol.Chem.13/2024

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-08 DOI: 10.1002/macp.202470027

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Combination of a Viscoelastic and a Tribological Analysis of a Low-Density Polyethylene with a High Degree of Cross-linking 高交联度低密度聚乙烯的粘弹性和摩擦学综合分析

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-08 DOI: 10.1002/macp.202470026

Franziska Schneck, Philana O. Kruse, Daniel Hesse-Hornich, N. Filipe Lopes Dias, Wolfgang Tillmann, Robert Jerusalem, Michail Maricanov, Frank Katzenberg, Jörg C. Tiller, Ulrich A. Handge

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Analysis of Macromolecular Systems as Enabler for Energy and Life Science Applications 分析作为能源和生命科学应用推动力的大分子系统

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-07-01 DOI: 10.1002/macp.202400055

Ilya Anufriev, Jonas Debbeler, Anja Traeger, Ivo Nischang

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A Strong, Flexible, and Anticounterfeiting Fluorescent Composite Hydrogel from Carboxymethyl Cellulose-Eu(III) Cross-Linked Polyvinyl Alcohol 由羧甲基纤维素-Eu(III) 交联聚乙烯醇制成的强韧、柔韧、防伪荧光复合水凝胶

IF 2.5 4区化学

Macromolecular Chemistry and Physics Pub Date : 2024-06-27 DOI: 10.1002/macp.202300440

Fang Ye, Jun Ye, Jian Xiong, Qiang Li

{"title":"A Strong, Flexible, and Anticounterfeiting Fluorescent Composite Hydrogel from Carboxymethyl Cellulose-Eu(III) Cross-Linked Polyvinyl Alcohol","authors":"Fang Ye, Jun Ye, Jian Xiong, Qiang Li","doi":"10.1002/macp.202300440","DOIUrl":"10.1002/macp.202300440","url":null,"abstract":"Fluorescent hydrogel as an advanced material has been used for anti-counterfeiting, probe detection, and optical devices. A facile strategy to prepare fluorescent hydrogel is developed by carboxymethyl cellulose (CMC) with Europium(III) and polyvinyl alcohol (PVA). The hydrogel forms a physical cross-linking network under mild reaction conditions without using volatile organic chemicals. The addition of CMC-Eu(III) improves the mechanical properties of the hydrogel. At 15% CMC-Eu(III), the hydrogel reaches its maximum tensile and compressive stress, which are 47.25 ± 10.35 and 10.14 ± 1.90 kPa, respectively. Meanwhile, the hydrogels exhibit a 5D0→7F2 characteristic emission peak assigned to Eu3+, which emits stable red fluorescence under 254 nm ultraviolet (UV) light. When this hydrogel is applied to paper, the paper showed hidden fluorescent dots under UV light. This additive also enhances the mechanical properties of the paper, which reveals the multifunctionality of this fluorescent hydrogel for anti-counterfeiting and reinforcement.","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 18","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504377","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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