Macromolecular Chemistry and Physics最新文献

{"title":"Masthead: Macromol. Chem. Phys. 14/2024","authors":"","doi":"10.1002/macp.202470029","DOIUrl":"10.1002/macp.202470029","url":null,"abstract":"","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 14","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/macp.202470029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141779754","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}

{"title":"Biodegradable Magnetic Vesicles for Magnetic Hyperthermia Stimulated Drug Release","authors":"Xin Li,&nbsp;Ya Liu,&nbsp;Xing Chen,&nbsp;Chenxi Zhao,&nbsp;Mengya Huang,&nbsp;Kui Shan,&nbsp;Xun Zhou,&nbsp;Xing Liu","doi":"10.1002/macp.202400136","DOIUrl":"10.1002/macp.202400136","url":null,"abstract":"<p>Magnetic nanomaterials have emerged as an effective drug-delivery platform for targeted imaging and therapy. However, it remains challenging to fabricate biodegradable magnetic nanoparticles with controllable drug release behaviors and strong magnetic responsiveness. Here an asiaticoside-loaded biodegradable magnetic vesicle is developed based on the self-assembly of amphiphilic block copolymer tethered superparamagnetic iron oxide nanoparticles. Thanks to the collective properties, the magnetic vesicles show stronger magnetic responsiveness than individual nanoparticles. Additionally, the magnetic vesicles are dissociated within weeks owing to the biodegradable polymer backbone, which can significantly improve the long-term biocompatibility of the nanomaterials. The asiaticoside-loaded magnetic vesicles can readily release the payloads in an alternating magnetic field, likely due to the rising local temperature over the phase transition temperature of the polymers attached on nanoparticles. This work provides new insights into the design and construction of biodegradable magnetic nanomedicines for targeted drug delivery.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 19","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785811","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}

{"title":"Correlation Between Side-Chain Arrangement and Main-Chain Helix Conformation in Liquid Crystalline Syndiotactic Poly(Substituted Methylene)s Bearing Cyanobiphenyl Mesogens","authors":"Masamichi Kiyoura,&nbsp;Noboru Koshimizu,&nbsp;Kazuhiro Shikinaka,&nbsp;Kiyotaka Shigehara,&nbsp;Masatoshi Tokita","doi":"10.1002/macp.202400204","DOIUrl":"10.1002/macp.202400204","url":null,"abstract":"<p>This study focuses on the helical conformation of the main chain of syndiotactic poly(substituted methylene)s with 4-cyanobiphenyl (CB) moieties incorporated at the ends of the alkyloxycarbonyl side chains. The polymers are designated as PCB<i>n</i>, where <i>n</i> is the number of methylene units in the spacer between the main chain and CB. PCB6 and PCB8 assemble the side chains into layers without positional order within the layers. Meanwhile, PCB10 and PCB12 assemble the side chains into layers with a short-range positional order. Each CB moiety at a side chain end is bonded to a carbon atom, which is arranged along the helical main chain contour, and its position correlates with that of the carbon atom. As the temperature increases, PCB10 undergoes a phase transition, losing the positional order of the side chains within a layer, which alters the main chain conformation. Consequently, the positions of the side-chain CB moieties affect the helical conformation of the main chain. In contrast, PCB12 maintains the main chain conformation when undergoing a phase transition similar to that of PCB10. PCB12 with the longer spacer allows the main chain to adopt a helix conformation, which is independent of the positions of side-chain CB moieties.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 20","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785809","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}

{"title":"Electrochemical Performance of Polyaniline-Polyvanadate-Copper Nanomaterials for the Detection of Benzoic Acid","authors":"Yiming Gao,&nbsp;Lihong Zhuang,&nbsp;Yanan Zhang,&nbsp;Yong Zhang,&nbsp;Lizhai Pei,&nbsp;Xinjiong Li","doi":"10.1002/macp.202470028","DOIUrl":"10.1002/macp.202470028","url":null,"abstract":"<p><b>Front Cover</b>: The picture on the cover of the article 2300444 by Yong Zhang, Lizhai Pei, and co-workers is the elemental map of polyaniline/copper vanadate composite nanomaterials under high power transmission electron microscope, red represents element C, orange represents element N, yellow represents element V, blue represents element Cu. The spatial distribution of C, N, V, and Cu is uniform, confirming the polymerization of polyaniline on the copper vanadate nanomaterials.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 14","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/macp.202470028","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141779755","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}

{"title":"Poly(Butylene Succinate) Copolyesters Modified with Linear-Chain Diols toward Adjustable Thermal, Mechanical, and Biodegradable Properties","authors":"Qiang Wang,&nbsp;Jiahao Yu,&nbsp;Chunhui Yu,&nbsp;Chunlei Zhang,&nbsp;Chao Wei,&nbsp;Yan Xiao","doi":"10.1002/macp.202400170","DOIUrl":"10.1002/macp.202400170","url":null,"abstract":"<p>The production and application of poly(butylene succinate) (PBS) still face challenges such as high production costs, insufficient toughness, and slow biodegradation. This study utilizes the ring-opening condensation polymerization method to prepare PBS copolyesters using succinic anhydride (SAA) and 1,4-butanediol (BDO) as raw materials, with 20 moL% different lengths of linear-chain diols as third monomers (carbon numbers are 3, 5, 6, 8, 9,10, and 12). Both PBS and its copolyesters exhibit high weight average molecular weights (18.8 × 10⁴–26.1 × 10⁴ g moL⁻¹), much higher than those obtained through the traditional conventional direct esterification method. Incorporating the third monomer reduces the glass transition temperature (<i>T</i>_g), crystallinity, and melting point (<i>T</i>_m) of the copolyesters. As the chain length of the third monomer increases, the copolyesters show improved toughness, with the elongation at break and notch impact strength of poly(butylene succinate<i>-ran-</i>dodecylene succinate) (P(BS<i>-ran-</i>DoS)) increasing from 374.1% and 5.6 KJ m⁻² of PBS to 723.2% and 64.8 KJ m⁻², respectively. The degradation rate of the copolyesters modified with short-chain diols increases significantly, and as the chain length of the third monomer increases, the degradation rate of the copolyesters slows down. Therefore, the selection of the third monomer can be used to adjust the properties of the polymer.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 19","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740931","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}

{"title":"Nonlinear Melt Rheology of Lamellae Forming Polystyrene-b-Poly-2-Vinylpyridine Diblock Copolymers","authors":"Matthias Heck,&nbsp;Manfred Wilhelm","doi":"10.1002/macp.202300441","DOIUrl":"10.1002/macp.202300441","url":null,"abstract":"<p>Lamellae forming polystyrene-<i>b</i>-poly-2-vinylpyridine diblock copolymer melts are investigated with linear shear rheology and Fourier transformation rheology (FT rheology) to quantify their nonlinear behavior under oscillatory shear via mechanical higher harmonic contributions such as <i>I</i>_3/1(ω₁, γ₀). The determination of the zero-shear nonlinearity (<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mrow></mrow>\u0000 <mn>3</mn>\u0000 </msup>\u0000 <msub>\u0000 <mi>Q</mi>\u0000 <mn>0</mn>\u0000 </msub>\u0000 <mrow>\u0000 <mo>(</mo>\u0000 <mi>ω</mi>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 <mo>≡</mo>\u0000 <msub>\u0000 <mi>lim</mi>\u0000 <mrow>\u0000 <msub>\u0000 <mi>γ</mi>\u0000 <mn>0</mn>\u0000 </msub>\u0000 <mo>→</mo>\u0000 <mn>0</mn>\u0000 </mrow>\u0000 </msub>\u0000 <msub>\u0000 <mi>I</mi>\u0000 <mrow>\u0000 <mn>3</mn>\u0000 <mo>/</mo>\u0000 <mn>1</mn>\u0000 </mrow>\u0000 </msub>\u0000 <mo>/</mo>\u0000 <msubsup>\u0000 <mi>γ</mi>\u0000 <mn>0</mn>\u0000 <mn>2</mn>\u0000 </msubsup>\u0000 </mrow>\u0000 <annotation>$^3Q_0(omega)equiv lim _{gamma _0 rightarrow 0}I_{3/1}/gamma _0^2$</annotation>\u0000 </semantics></math>) by a variation of γ₀ is hindered by the increasing domain alignment at increasing γ₀. Thus, an approach for determining ³<i>Q</i>₀(<i>T</i>) by a variation of the temperature is developed and used. This approach allows obtaining insights on the nonlinear behavior directly at temperature-dependent phase transitions, such as at the order-disorder transition temperature <i>T</i>_<i>ODT</i> of block copolymers. The maximum of ³<i>Q</i>₀ is found to be close to <i>T</i>_<i>ODT</i>. The nonlinearity originating from the connection of the unequal polymer blocks is shown to dominate the overall nonlinearity, and the maximum of ³<i>Q</i>₀(<i>T</i>) correlates to  domain alignment for <i>T</i> &lt; <i>T</i>_<i>ODT</i>.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 18","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/macp.202300441","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740934","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}

{"title":"Observation of Polymerization-Induced Phase Separation During Polymerization of Methyl Methacrylate in the Presence of Poly(Ethylene Glycol)","authors":"Shodai Onozato,&nbsp;Chie Kojima,&nbsp;Akikazu Matsumoto,&nbsp;Yasuhito Suzuki","doi":"10.1002/macp.202400147","DOIUrl":"10.1002/macp.202400147","url":null,"abstract":"<p>Polymerization-induced phase separation takes place when a miscible component of the monomer becomes immiscible as the polymer is formed. One example is the polymerization of methyl methacrylate (MMA) in the presence of poly(ethylene glycol) (PEG). Depending on the initial conditions, microscopic structures, including porous structures, co-continuous monolith structures, and particle aggregation structures, are obtained. In this study, the phase separation process is analyzed using an optical microscope and fluorescence microscope. The nucleation or spinodal decomposition in the initial stage, subsequent growth in the microscopic domains, and eventual fixation of the structure are observed. The observed images are analyzed using image analysis software. The particle number and the particle size as a function of reaction time are evaluated. Conversion and molecular weight distribution as a function of reaction time are also analyzed.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 19","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740928","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}

{"title":"About Polycondensation, Disproportionation, and Cyclization of Acetylated Poly(L-Lactide) Esters","authors":"Hans R. Kricheldorf,&nbsp;Steffen M. Weidner,&nbsp;Andreas Meyer","doi":"10.1002/macp.202400175","DOIUrl":"10.1002/macp.202400175","url":null,"abstract":"<p>L-lactide (LA) is polymerized with ethyl L-lactate or trifluoroethanol as initiators (LA/In = 30/1), and the resulting poly(L-lactide) esters are acetylated with acetic anhydride. The acetylated PLA esters are mixed with SnOct₂, dibutyltin bis(4-chlorophenoxide), or dibutyltin bis(pentafluorophenoxide) in solution and crystallized at 120 °C. The doped crystals are annealed at 140 °C or at 160 °C for 7, 14, and 28 days, and the chemical modifications that occurred in the solid state are monitored by matrix-assisted laser desorption/ionization time-of-flight (MALDI TOF) mass spectrometry, gel permeation chromatography (GPC), and differential scanning calorimetry (DSC) measurements. All catalysts promoted polycondensation, while no significant formation of cycles is observed. However, in the presence of SnOct₂, disproportionation of chains occurred upon annealing at 120 or 140 °C, and crystallites consisting of extended chains with M_n values ≈3500 – 3600 and low dispersities (Ð &lt; 1.5) are formed.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 19","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/macp.202400175","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740930","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}

{"title":"High Dielectric Thermal Conductivity Polyvinylidene Fluoride Composites Based on Surface-Modified Graphene Nanosheets and Aluminum Nitride","authors":"Mengen Zhao,&nbsp;Haijun Wang,&nbsp;Kun Liu,&nbsp;Yao Wu,&nbsp;Chunlei Yuan","doi":"10.1002/macp.202400020","DOIUrl":"10.1002/macp.202400020","url":null,"abstract":"<p>This article provides reports on the method of surface functionalization modification of graphene nanosheets (GNPs) and aluminum nitride (AlN) through polydopamine and silane coupling agents, respectively. This modification achieves excellent dielectric performance of polyvinylidene fluoride (PVDF) composites by ensuring the uniform dispersion of fillers within the matrix. The synergistic effect between surface-modified GNPs and AlN is conducive to increasing polar PVDF crystals and promoting interface polarization. The prepared PVDF/GNPs/AlN composites exhibit a dielectric constant as high as 45 with a dielectric loss of only 0.044. Meanwhile, the enhanced interface compatibility of composite materials, to a certain extent, reduces interface thermal resistance and forms an effective thermal conduction network, which enhances the heat dissipation capability of electronic devices and presents potential application in the dielectric energy storage.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 18","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740929","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}

{"title":"Hybrid Self-Repairing Polymer Composites Based on a Mixture of Intrinsic and Extrinsic Self-Healing","authors":"Zhenyu Liu,&nbsp;Yuting Zhong,&nbsp;Shuai Li,&nbsp;Simin Yu,&nbsp;Jiang Zhong,&nbsp;Yuping Yang,&nbsp;Liang Shen","doi":"10.1002/macp.202400079","DOIUrl":"10.1002/macp.202400079","url":null,"abstract":"<p>The development of high-strength and multiple self-healing polymer materials remains a major challenge. In this study, a hybrid self-healable polymer using the combination of intrinsic and extrinsic self-healing is demonstrated. The epoxy resin microcapsules with dynamic disulfide bonded shells are successfully prepared through an interfacial polymerization method, which are then added into the intrinsically self-healable epoxy resin substrate also containing disulfide bonds. The unique combination structure enables the polymer composites to exhibit high mechanical strength and excellent multiple self-healing efficiency. On the one hand, the Young's modulus and tensile strength of the material are enhanced due to the reinforcement effect of the fillers. On the other hand, the extrinsic self-healing strategy of the microcapsules, which released repair agents, can support the intrinsic repairing substrate to improve the self-healing ability of the material. More interestingly, the design of the disulfide bond structure of the microcapsule shell contributes to the high self-healing capability of the material during multiple self-healing processes.</p>","PeriodicalId":18054,"journal":{"name":"Macromolecular Chemistry and Physics","volume":"225 18","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740868","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}