Macromolecular Chemistry: Current Scientific Articles about Macromolecules
Current Articles in the field of Macromolecular Chemistry published in scientific online journals.
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On this page considered biochemistry journals:
Macromolecular Rapid Communications - published by
Wiley Interscience -
... is one the most cited journals publishing original research in general macromolecular science. Each original article is commented on by current experts in the field. The commentary describes the role of each paper in the development of the particular area of polymer science and the historical background, and significance of the article.
Macromolecules - published by
The American Chemical Society, ACS -
Focuses on all fundamentals of polymer science, including synthesis, polymerization mechanisms and kinetics, chemical modification, and solution/melt/solid-state characteristics, as well as surface properties of organic, inorganic, and naturally occurring polymers.
Macromolecular Chemistry and Physics - published by
Wiley Interscience -
The journal contains original research papers in all topical areas of polymer chemistry and physics. Outstanding macromolecular science research is presented in the form of strictly peer-reviewed Full Papers. Macromolecular Chemistry and Physics also includes Highlights, Book Reviews, Essays, Macromolecular News and Conference Reports.
Biomacromolecules - published by
The American Chemical Society, ACS -
... explores the interactions of macromolecules with biological systems and their environments as well as biological approaches to the design of polymeric materials. Cutting-edge research at the interface of polymer science and biological sciences.
Current research articles of the mentioned
journals:
Mu-Ping Nieh, Michael D. Guiver, Dae Sik Kim, Jianfu Ding, and Tyler Norsten Web Release Date: Thu, 24 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma800470j
Ricardo M. P. da Silva, Sofia G. Caridade, Julio San Román, João F. Mano, and Rui L. Reis Web Release Date: Thu, 24 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/bm8001649
Kayo Terada, Erik B. Berda, Kenneth B. Wagener, Fumio Sanda, and Toshio Masuda Web Release Date: Wed, 23 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma800367z
Jianhui Hou, Mi-Hyae Park, Shaoqing Zhang, Yan Yao, Li-Min Chen, Juo-Hao Li, and Yang Yang Web Release Date: Wed, 23 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma800820r
Mikhail Yu. Efremov, Anna V. Kiyanova, and Paul F. Nealey Web Release Date: Wed, 23 Jul 2008 00:00:00 EDT (Communication to the Editor) DOI: 10.1021/ma8011416
Mehmet Atilla Tasdelen, Wim Van Camp, Eric Goethals, Philippe Dubois, Filip Du Prez, and Yusuf Yagci Web Release Date: Wed, 23 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma801149x
Andrew K. Ekaputra, Glenn D. Prestwich, Simon M. Cool, and Dietmar W. Hutmacher Web Release Date: Wed, 23 Jul 2008 00:00:00 EDT (Communication) DOI: 10.1021/bm800565u
Jianguo Sun, Stefan V. Graeter, Lin Yu, Shifeng Duan, Joachim P. Spatz, and Jiandong Ding Web Release Date: Wed, 23 Jul 2008 00:00:00 EDT (Communication) DOI: 10.1021/bm800477s
Nobuyuki Morimoto, Xing-Ping Qiu, Françoise M. Winnik, and Kazunari Akiyoshi Web Release Date: Wed, 23 Jul 2008 00:00:00 EDT (Communication to the Editor) DOI: 10.1021/ma801332x
Eirini F. Ioannou, Grigoris Mountrichas, Stergios Pispas, Efstratios I. Kamitsos, and George Floudas Web Release Date: Wed, 23 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma8008542
Youchun Zhang, Antonius A. Broekhuis, Marc C. A. Stuart, Tatiana Fernandez Landaluce, Daniele Fausti, Petra Rudolf, and Francesco Picchioni Web Release Date: Wed, 23 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma800869w
Kevin K. L. Cheuk, Bing Shi Li, Jacky W. Y. Lam, Yong Xie, and Ben Zhong Tang Web Release Date: Wed, 23 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma800976e
A novel capacitor with high dielectric constant ([epsiv]) has been developed by blending poly(vinylidene fluoride) (PVDF) with polyamide (PA11). The blends show high dielectric constants ([epsiv]blend = 40), which give better frequency stability (1 MHz), and excellent mechanical properties. Based on certain volume fractions, the measured dielectric constants ([epsiv]blend) were found to exceed those of the corresponding polymers, in contrasted to conventional composites, where [epsiv]polymerA < [epsiv]composite < [epsiv]polymerB. SEM investigations suggest that the enhanced dielectric behavior originates from significant interfacial polymer-polymer interactions. DSC and XRD demonstrate that blending PA11 with PVDF affects the crystalline behavior of each component. However, the PA11/PVDF blends exhibit a slightly high dielectric loss (tan[delta] [ap] 0.17), which is a great disadvantage to a capacitor. Adding a copolymer of styrene and maleic anhydride decreased the dielectric loss (tan[delta] [ap] 0.057) and increased the dielectric constant ([epsiv]blend = 60). Our findings suggest that the high-[epsiv] polymeric blends created represent a novel type of material that is flexible and easy to process, of relatively high dielectric constant, of high breakdown strength and, moreover, is suited to applications in flexible electronics.
We have developed a novel strategy for the preparation of ion-bonded supramolecular star polymers by RAFT polymerization. An ion-bonded star supramolecule with six functional groups was prepared from a triphenylene derivative containing tertiary amino groups and trithiocarbonate carboxylic acid, and used as the RAFT agent in polymerizations of tert-butyl acrylate (tBA) and styrene (St). Molecular weights and structures of the polymers were characterized by 1H NMR and GPC. The results show that the polymerization possesses the character of living free-radical polymerization and the ion-bonded supramolecular star polymers PSt, PtBA, and PSt-b-PtBA, with six well-defined arms, were successfully synthesized.
Two novel n-type conjugated polymers based on perylene diimide (PDI), poly(PDI-vinylene) (PDIV), and poly(PDI-thienylene) (PDITh), have been designed and synthesized by the Stille coupling reaction. In comparison with the PDI monomer (compound M1), PDIV and PDITh films show a significantly broad absorption band from 380 to 720 nm, and a narrower bandgap of [ap]1.71 and 1.74 eV, respectively. Cyclic voltammograms of the two polymers display a couple of reversible reduction/re-oxidation (n-doping/dedoping) peaks. The onset reduction (n-doping) potentials of PDIV and PDITh are at -0.62 V and -0.66 V versus Ag/Ag+ respectively, which correspond to the electron affinities (EAs) of 4.09 eV for PDIV and 4.05 eV for PDITh. The EA values of the two polymers are the highest among the n-type conjugated polymers reported to date. The results indicate that PDIV and PDITh could be used as polymer acceptors in all polymer solar cells.
An ideal scaffold should have good mechanical properties and provide a biologically functional implant site. A rapid prototyping system has been introduced as a good method of fabricating 3D scaffolds that mimic the structure in the human body. However, the scaffolds have strands that are too smooth and a pore size that is too large relative to the seeded cells and present unfavorable conditions for initial cell attachment. To overcome these problems, we propose a hybrid technology combining a 3D rapid prototyping system and an electrospinning process to produce a hierarchical 3D biomedical scaffold. The resulting structure consists of alternating layers of 3D-structured/microsized polymer strands and nanofiber webs. The results of cell culturing of chondrocytes indicate that this technique is a feasible new method for fabricating high quality 3D polymeric scaffolds.
Günter Dlubek, Jürgen Pionteck, Klaus Rätzke, Jan Kruse, and Franz Faupel Web Release Date: Tue, 22 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma800748a
Jin Young Park, Nils Koenen, Michael Forster, Ramakrishna Ponnapati, Ullrich Scherf, and Rigoberto Advincula Web Release Date: Tue, 22 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma702402g
Hyung-il Lee, Krzysztof Matyjaszewski, Sherryl Yu-Su, and Sergei S. Sheiko Web Release Date: Tue, 22 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma800412s
A combination of reversible addition fragmentation chain transfer (RAFT) polymerization and hetero Diels-Alder (HDA) chemistry has been utilized to successfully generate functional core-shell microspheres. Initially, precipitation polymerization in conjunction with the RAFT technique has been employed to synthesize divinylbenzene (DVB) microspheres with surface expressed RAFT groups. Subsequently, HDA cycloaddition has been performed under mild reaction conditions (50 °C, 24 h) with a diene-functionalized poly([epsiv]-caprolactone) (PCL). While the successful grafting is immediately evident by optical inspection of the microspheres (color change from purple to white), X-ray photoelectron spectroscopy (XPS), and attenuated total reflectance spectroscopy (ATR) were additionally employed to characterize the chemical composition and surface functionalization of the microspheres. Further, confocal microscopy was used to confirm the presence of grafted PCL chains after labeling them with rhodamine B.
Polycarbonate/polyethylene random block copolymers (RBCs) have been produced using olefin metathesis catalysis in a process termed segment interchange metathesis. An olefin metathesis catalyst tolerant of polar functionality was added to reagent polycarbonate and polyethylene polymers which contained internal unsaturated carbon-carbon bonds. Subsequent metathesis occurred, segmenting the reagent polymers, resulting in RBCs. The block copolymers self-assembled into microphase structures which persisted into the melt state as determined by small angle X-ray scattering (SAXS).
Polyimides are well established as gas separation membranes due to their intrinsically low free volume and correspondingly high H2 selectivity relative to other gases such as CO2. Prior studies have established that H2/CO2 selectivity can be improved by crosslinking polyimides with diamines differing in spacer length. In this work, we follow the evolution of macroscopic and microscopic properties of a commercial polyimide over long crosslinking times (tx) with 1,3-diaminopropane. According to spectroscopic analysis, the crosslinking reaction saturates after [ap]24 h, whereas tensile, nanoindentation and stress relaxation tests reveal that the material stiffens, and possesses a long relaxation time that increases with increasing tx. Although differential scanning calorimetry shows that the glass transition temperature decreases systematically with increasing tx, permeation studies indicate that the permeabilities of H2 and CO2 decrease, while the H2/CO2 selectivity increases markedly, with increasing tx. At long tx, the polyimide becomes impermeable to CO2, suggesting that it could be used as a barrier material.
Cyrille Boyer, Jingquan Liu, Volga Bulmus, Thomas P. Davis, Christopher Barner-Kowollik, and Martina H. Stenzel Web Release Date: Sat, 19 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma800289u
Cécile M. Gibon, Sophie Norvez, Sylvie Tencé-Girault, and James T. Goldbach Web Release Date: Sat, 19 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma800612t
Maria V. Lozano, Daniel Torrecilla, Dolores Torres, Anxo Vidal, Fernando Domínguez, and Maria J Alonso Web Release Date: Sat, 19 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/bm800298u
Adam J. Meuler, Guillaume Fleury, Marc A. Hillmyer, and Frank S. Bates Web Release Date: Sat, 19 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma800885s
Tomasz M. Kapłon, Grzegorz Rymarczyk, Małgorzata Nocula-Ługowska, Michał Jakób, Marian Kochman, Marek Lisowski, Zbigniew Szewczuk, and Andrzej Ożyhar Web Release Date: Fri, 18 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/bm800135m
Josefina Lindqvist, Daniel Nyström, Emma Östmark, Per Antoni, Anna Carlmark, Mats Johansson, Anders Hult, and Eva Malmström Web Release Date: Fri, 18 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/bm800193n
Wouter Vanormelingen, Karlien Van den Bergh, Thierry Verbiest, and Guy Koeckelberghs Web Release Date: Fri, 18 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma8012114
Wellington S. Adriano, Dany B. Mendonça, Dasciana S. Rodrigues, Enrique J. Mammarella, and Raquel L. C. Giordano Web Release Date: Thu, 17 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/bm8002754
Erin S. McGarrity, Phillip M. Duxbury, Michael E. Mackay, and Amalie L. Frischknecht Web Release Date: Thu, 17 Jul 2008 00:00:00 EDT (Note) DOI: 10.1021/ma801003e
Ji Sun Park, Kyeongsoon Park, Dae Gyun Woo, Han Na Yang, Hyung-Min Chung, and Keun-Hong Park Web Release Date: Thu, 17 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/bm800251x
Violetta Olszowka, Volker Kuntermann, and Alexander Böker Web Release Date: Wed, 16 Jul 2008 00:00:00 EDT (Communication to the Editor) DOI: 10.1021/ma800848b
Rafal A. Mickiewicz, Eleftherios Ntoukas, Apostolos Avgeropoulos, and Edwin L. Thomas Web Release Date: Wed, 16 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma801022k
Kazuya Matsumoto, Elizabeth A. Costner, Isao Nishimura, Mitsuru Ueda, and C. Grant Willson Web Release Date: Wed, 16 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma800295s
Hans E. Miltner, Nadia Grossiord, Kangbo Lu, Joachim Loos, Cor E. Koning, and Bruno Van Mele Web Release Date: Wed, 16 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma800643j
Paul M. Zelisko, Kulwinder K. Flora, John D. Brennan, and Michael A. Brook Web Release Date: Wed, 16 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/bm800226z
The morphology of a H-shaped block copolymer (poly(ethylene glycol) backbone and polystyrene branches (PS)2PEG(PS)2) in a thin film has been investigated. A peculiar square lamella that has a phase-separated microdomain at its surface is obtained after spin coating. The experimental temperature plays a critical role in the lamellar formation. The copolymer first self-assembles into square lamellar micelles with an incomplete crystalline core due to the crystallizability of PEG. In the subsequent process of solvent evaporation, phase separation between PS and non-crystalline PEG attached at the chain-folded PEG surface takes place, which results in phase-separated microdomains being formed at the lamellar surface.
Herein, a convenient and general method to simultaneously fix and functionalize polymeric vesicles with sulphydryl groups by the co-self-assembly of poly(ethylene oxide)-block-poly[3-(triethoxysilyl)propyl methacrylate] (PEO-b-PTESPMA) and 3-mercaptopropyltrialkoxysilane in an aqueous solution is reported. The presence of sulphydryl groups across the vesicle membrane has been confirmed by using an energy-filtered technique during TEM analysis and by capturing Au nanoparticles.
Terpyridine-modified hydrophobic poly(dimethylsiloxane) and hydrophilic poly(ethylene oxide) were combined to new metallo-supramolecular AB-diblock copolymers by utilizing Ru(II) ions. The polymers were synthesized by hydrosilylation of heteroleptic allyloxy-functionalized Ru(II) complexes. The amphiphilic AB-diblock copolymers were used to prepare micelles in an aqueous environment, which were subsequently characterized by dynamic light scattering and cryogenic transmission electron microscopy.
Two cyanate ester monomers (CEMs) based on oligomeric aryl ether (OAE) derivatives of bisphenol AF and bisphenol A, with multiple reactive cyanate groups, were developed as technologically highly relevant thermosets. These CEMs are liquids processable at room temperature and can be crosslinked by cyclotrimerization of the cyanate groups to form extended polycyanurate (PC) networks at lower temperatures (<265 °C) than many existing CEMs. The cured PCs have high Tgs (>280 °C), with excellent thermal, mechanical, and dielectric properties. PC nanorods with diameters of 65 or 380 nm could be moulded in porous alumina templates from the OAE-CEMs. The high aspect ratio nanorods with a length in the order of 100 µm were hydrolytically stable upon extended exposure to boiling water.
Ravi Shankar, Arjun K. Krishnan, Tushar K. Ghosh, and Richard J. Spontak Web Release Date: Sat, 12 Jul 2008 00:00:00 EDT (Article) DOI: 10.1021/ma071903g
