Macromolecular Rapid Communications

Cover image for Vol. 32 Issue 21

November 1, 2011

Volume 32, Issue 21

Pages 1683–1759

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Contents
    5. Feature Article
    6. Communications
    7. Correction
    1. Macromol. Rapid Commun. 21/2011

      Severin J. Sigg, Farzad Seidi, Kasper Renggli, Tilana B. Silva, Gergely Kali and Nico Bruns

      Article first published online: 27 OCT 2011 | DOI: 10.1002/marc.201190057

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      Front Cover: A cocktail of a peroxidase from the root of horseradish and vitamin C used for atom transfer radical polymerization (ATRP) of an acrylamide in aqueous solution. The enzyme displays a newly discovered activity as a catalyst for ATRP. Such ATRPases could become environmentally friendly and nontoxic alternatives to conventional ATRP catalysts. Further details can be found in the by S. J. Sigg, F. Seidi, K. Renggli, T. B. Silva, G. Kali, and N. Bruns*page 1710.

  2. Back Cover

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Contents
    5. Feature Article
    6. Communications
    7. Correction
    1. Macromol. Rapid Commun. 21/2011

      Juanping Hu, Xianfeng Wang, Bin Ding, Jinyou Lin, Jianyong Yu and Gang Sun

      Article first published online: 27 OCT 2011 | DOI: 10.1002/marc.201190058

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      Back Cover: Polyurethane nanofiber/net membranes with fascinating structures consisting of common nanofibers and soap-bubble-like structured nanonets are controllably prepared via an electrospinning/netting process. This novel material provides a new platform for constructing ultrafilters, special protective clothing, sensors, etc. Further details can be found in the article by J. Hu, X. Wang, B. Ding,* J. Lin, J. Yu,* and G. Sun on page 1729.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Contents
    5. Feature Article
    6. Communications
    7. Correction
    1. Macromol. Rapid Commun. 21/2011 (pages 1683–1686)

      Article first published online: 27 OCT 2011 | DOI: 10.1002/marc.201190056

  4. Feature Article

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Contents
    5. Feature Article
    6. Communications
    7. Correction
    1. Bergman Cyclization in Polymer Chemistry and Material Science (pages 1688–1698)

      Yuli Xiao and Aiguo Hu

      Article first published online: 23 AUG 2011 | DOI: 10.1002/marc.201100378

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      Bergman cyclization shows great promise in polymer chemistry and material science. Diradicals generated from Bergman cyclization are used for construction of soluble polyarenes, intramolecular cross-linking linear polymer chains, initiating radical polymerization and introducing polymer onto the surface of carbon materials. Recent development in these areas is highlighted.

  5. Communications

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Contents
    5. Feature Article
    6. Communications
    7. Correction
    1. Polymer Brushes with Phototriggered and Phototunable Swelling and pH Response (pages 1699–1703)

      Jiaxi Cui, Omar Azzaroni and Aránzazu del Campo

      Article first published online: 29 AUG 2011 | DOI: 10.1002/marc.201100435

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      A polymer brush with light- and pH-response is prepared from a methacrylate monomer with a 4,5-dimethoxy-2-nitrobenzyl (NVOC) photolabile NH2 group. In the caged state, the polymer brush does not show a pH response. Controlled irradiation cleaves NVOC and turns on a dose-dependent pH response of a polycation brush.

    2. pH Dependent Elasticity of Polystyrene-block-poly(acrylic acid) Vesicle Shell Membranes by Atomic Force Microscopy (pages 1704–1709)

      Qi Chen and G. Julius Vancso

      Article first published online: 29 AUG 2011 | DOI: 10.1002/marc.201100332

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      The stiffness of PS-b-PAA vesicle membranes is estimated using AFM force measurements in different pH environments. The values of the apparent Young's modulus of the membranes decrease with increasing pH. This phenomenon is ascribed to the electrostatic interaction between the PAA chains resulting in the thinning of the membrane.

    3. Horseradish Peroxidase as a Catalyst for Atom Transfer Radical Polymerization (pages 1710–1715)

      Severin J. Sigg, Farzad Seidi, Kasper Renggli, Tilana B. Silva, Gergely Kali and Nico Bruns

      Article first published online: 12 AUG 2011 | DOI: 10.1002/marc.201100349

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      Horseradish peroxidase is identified as an enzyme that catalyzes polymerization of N-isopropylacrylamide under ARGET ATRP conditions. The polymerization has controlled character and bromine-terminated polymers are obtained, but the mechanism is more complex than a simple ATRP mechanism. Such ATRPases could develop into environmentally favorable alternatives to conventional ATRP catalysts.

    4. Thermally Tunable Surface Wettability of Electrospun Fiber Mats: Polystyrene/Poly(N-isopropylacrylamide) Blended versus Crosslinked Poly[(N-isopropylacrylamide)-co-(methacrylic acid)] (pages 1716–1721)

      Palanikkumaran Muthiah, Sarah M. Hoppe, Timothy J. Boyle and Wolfgang Sigmund

      Article first published online: 23 AUG 2011 | DOI: 10.1002/marc.201100373

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      Polystyrene/poly(N-isopropylacrylamide) blended and crosslinked poly[(N-isopropylacrylamide)-co-(methacrylic acid)] electrospun fiber mats successfully demonstrate thermally tunable surface wettability. Thermo-responsive PNIPA and the micro/nanostructural surface roughness with air pockets generated from electrospinning are used to explain the mechanism behind the observed extreme wettability.

    5. Dendritic Carrier Based on PEG: Design and Degradation of Acid-sensitive Dendrimer-like Poly(ethylene oxide)s (pages 1722–1728)

      Xiaoshuang Feng, Elliot L. Chaikof, Christelle Absalon, Carlos Drummond, Daniel Taton and Yves Gnanou

      Article first published online: 14 SEP 2011 | DOI: 10.1002/marc.201100459

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      Dendrimer-like PEO's are synthesized up to generation 7 and a molar mass of 446 000 g·mol−1from a purposely designed ABC-type branching agent containing a cleavable ketal group. Upon acidic cleavage linear PEO chains of low molar mass (≈2000 g·mol−1) are released.

    6. One-step Electro-spinning/netting Technique for Controllably Preparing Polyurethane Nano-fiber/net (pages 1729–1734)

      Juanping Hu, Xianfeng Wang, Bin Ding, Jinyou Lin, Jianyong Yu and Gang Sun

      Article first published online: 19 AUG 2011 | DOI: 10.1002/marc.201100343

      Thumbnail image of graphical abstract

      Polyurethane (PU) nano-fiber/net (NFN) membranes with attractive structures consisting of electrospun nanofibers and soap-bubble-like structured nano-nets are controllably prepared via electro-spinning/netting process. Taking advantage of large specific surface area, high porosity and large stacking density, PU NFN membranes provide a new platform for constructing ultrafilters, special protective clothing, ultrasensitive sensors, etc.

    7. Surface Initiated Polymerization on Pulsed Plasma Deposited Polyallylamine: A Polymer Substrate-Independent Strategy to Soft Surfaces with Polymer Brushes (pages 1735–1740)

      Basit Yameen, Hadayat Ullah Khan, Wolfgang Knoll, Renate Förch and Ulrich Jonas

      Article first published online: 19 AUG 2011 | DOI: 10.1002/marc.201100368

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      Pulsed plasma deposited polyallylamine leads to amine functionalized soft surfaces, which is demonstrated as a general route to surface tethering an initiator for highly resourceful atom transfer radical polymerization (ATRP) through a robust amide linkage. The successful fabrication of polymer brushes is ascertained by ATR-IR spectroscopy and XPS. The general scope of presented strategy is demonstrated by employing five different polymer types.

    8. Facile and Controlled Fabrication of Functional Gold Nanoparticle-coated Polystyrene Composite Particle (pages 1741–1747)

      Yunxing Li, Yunfei Pan, Lili Zhu, Zhaoqun Wang, Dongmeng Su and Gi Xue

      Article first published online: 19 AUG 2011 | DOI: 10.1002/marc.201100377

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      A thermodynamically driving heterocoagulation of gold nanoparticles (AuNPs) and polystyrene (PS) microspheres is successfully carried out: the AuNPs are formed and simultaneously coated onto the raw PS microspheres pre-existing in the oxidation–reduction system, to furthest simplify the assembly process. The resultant raspberry-like AuNPs-coated PS composite particles exhibit excellent properties in catalysis and surface enhanced Raman scattering.

    9. Nickel(II) α-Diimine Catalyst for Grignard Metathesis (GRIM) Polymerization (pages 1748–1752)

      Harsha D. Magurudeniya, Prakash Sista, Jacob K. Westbrook, Taryn E. Ourso, Khuong Nguyen, Marie C. Maher, Mussie G. Alemseghed, Michael C. Biewer and Mihaela C. Stefan

      Article first published online: 25 AUG 2011 | DOI: 10.1002/marc.201100433

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      A nickel α-diimine catalyst was successfully employed as a catalyst for the Grignard metathesis (GRIM) polymerization of 2,5-dibromo-3-hexylthiophene, 2-bromo-5-iodo-3-hexylthiophene and bulky 2,6-dibromo-4,8-bis(4-decylphenylethynyl)benzo[1,2-b:4,5-b′]dithiophene monomer. Poly(3-hexylthiophene) containing ≈98% head-to-tail couplings was synthesized by GRIM polymerization 2-bromo-5-iodo-3-hexylthiophene.

    10. Self-Assembly of Poly(2-alkyl-2-oxazoline)s by Crystallization in Ethanol–Water Mixtures Below the Upper Critical Solution Temperature (pages 1753–1758)

      Christina Diehl, Ina Dambowsky, Richard Hoogenboom and Helmut Schlaad

      Article first published online: 29 AUG 2011 | DOI: 10.1002/marc.201100421

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      Hierarchical structures are formed by crystallization of poly(2-alkyl-2-oxazoline)s, alkyl=isobutyl and nonyl, in ethanol-water mixtures at room temperature, i.e., below the upper critical solution temperature, similar to poly(2-isopropyl-2-oxazoline) in hot water. The crystallization induced self-assembly process appears to be a rather general phenomenon occurring for semi-crystalline polymers in liquid–liquid two phase systems.

  6. Correction

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Contents
    5. Feature Article
    6. Communications
    7. Correction
    1. You have free access to this content
      Horseradish Peroxidase as a Catalyst for Atom Transfer Radical Polymerization (page 1759)

      Severin J. Sigg, Farzad Seidi, Kasper Renggli, Tilana B. Silva, Gergely Kali and Nico Bruns

      Article first published online: 27 OCT 2011 | DOI: 10.1002/marc.201100579

      This article corrects:

      Horseradish Peroxidase as a Catalyst for Atom Transfer Radical Polymerization

      Vol. 32, Issue 21, 1710–1715, Article first published online: 12 AUG 2011

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