Macromolecular Chemistry and Physics

Cover image for Vol. 213 Issue 20

October 26, 2012

Volume 213, Issue 20

Pages 2093–2200

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    8. Full Papers
    1. Macromol. Chem. Phys. 20/2012 (page 2093)

      Jung Kyu Park, Ki Su Kim, Junseok Yeom, Ho Sang Jung and Sei Kwang Hahn

      Version of Record online: 12 OCT 2012 | DOI: 10.1002/macp.201290064

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      Front Cover: AFM of poly(N-isopropylacrylamide-co-dopamine methacrylamide) [P(NIPAAm-co-DMAAm)], with catechol groups for facile surface modification, clearly visualized the temperature-responsive transient phase transition. In addition, the adhesive and temperature-responsive P(NIPAAm-co-DMAAm) was successfully exploited for the preparation of fibroblast cell sheets. Further details can be found in the article by J. K. Park, K. S. Kim, J. Yeom, H. S. Jung, and S. K. Hahn* on page 2130.

  2. Back Cover

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    1. Macromol. Chem. Phys. 20/2012 (page 2204)

      Hideto Tsuji, Kohji Tashiro, Leevameng Bouapao and Makoto Hanesaka

      Version of Record online: 12 OCT 2012 | DOI: 10.1002/macp.201290065

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      Back Cover: The cover shows the spherulites where poly(L-lactide) (PLLA) co-crystallized with poly(L-lactide-co-D-lactide) [P(LLA-DLA)] (77/23) (upper left) and PLLA and poly(L-lactide-co-glycolide) [P(LLA-GA)] (78/22) crystallized separately (lower right). The effects of P(LLA-DLA) on crystallization was larger than those of P(LLA-GA). For more information, see the article by H. Tsuji,* K. Tashiro, L. Bouapao, and M. Hanesaka on page 2099.

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    1. Macromol. Chem. Phys. 20/2012

      Version of Record online: 12 OCT 2012 | DOI: 10.1002/macp.201290066

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    1. Separate Crystallization and Cocrystallization of Poly(L-lactide) in the Presence of L-Lactide-Based Copolymers With Low Crystallizability, Poly(L-lactide-co-glycolide) and Poly(L-lactide-co-D-lactide) (pages 2099–2112)

      Hideto Tsuji, Kohji Tashiro, Leevameng Bouapao and Makoto Hanesaka

      Version of Record online: 14 SEP 2012 | DOI: 10.1002/macp.201200208

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      The low crystallizability of poly(L-lactide-co-glycolide) [P(LLA-GA)] (78/22) was not influenced by the presence of homopolymer poly(L-lactide) (PLLA); blends of these two polymers formed discrete domains and crystallized separately in respective crystallites. Interestingly, initially noncrystallizablepoly(L-lactide-co-D-lactide) [P(LLA-DLA)] (77/23) became crystallizable in the presence of PLLA and cocrystallized in the same crystallites.

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    1. Macromol. Chem. Phys. 20/2012 (page 2113)

      Yuping Yuan and Tsuyoshi Michinobu

      Version of Record online: 12 OCT 2012 | DOI: 10.1002/macp.201290063

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      Frontispiece: A thiophene-containing platinum polyyne polymer was successfully converted into narrow band gap polymers with charge-transfer bands and potent redox activities by the efficient addition reactions of strong acceptor molecules, such as tetracyanoethylene (TCNE) and 7,7,8,8-tetracyanoquinodimethane (TCNQ). Further details can be found in the article by Y. Yuan and T. Michinobu* on page 2114.

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    1. Construction of Donor–Acceptor Chromophores in Platinum Polyyne Polymer by [2 + 2] Cycloaddition of Organic Acceptors (pages 2114–2119)

      Yuping Yuan and Tsuyoshi Michinobu

      Version of Record online: 28 AUG 2012 | DOI: 10.1002/macp.201200316

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      The efficient conversion of a thiophene-containing platinum polyyne polymer into narrow band gap polymers is reported. The conversion method is based on the quantitative addition of cyano-based acceptor molecules, such as tetracyanoethylene (TCNE) and 7,7,8,8-tetracyanoquinodimethane (TCNQ), to the main chain alkynes. The resulting polymers show low energy charge-transfer bands and redox activities attributable to their narrow band gaps.

    2. Surface Engineering of Poly(ethylene terephthalate) for Durable Hemocompatibility via a Surface Interpenetrating Network Technique (pages 2120–2129)

      Jiang Li, Francis Lin, Lingdong Li, Jing Li and Song Liu

      Version of Record online: 7 SEP 2012 | DOI: 10.1002/macp.201200251

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      The substrate thermoplastic PET is physically crosslinked while the functional polymer poly(N-(2-aminoethyl) acrylamide) (PAEAM) is chemically crosslinked to interlock with the substrate. By bonding with the amine groups of welded PAEAM, heparin is durably immobilized onto the substrate to offer improved long-lasting hemocompatibility.

    3. Facile Surface Modification and Application of Temperature Responsive Poly(N-isopropylacrylamide-co-dopamine methacrylamide) (pages 2130–2135)

      Jung Kyu Park, Ki Su Kim, Junseok Yeom, Ho Sang Jung and Sei Kwang Hahn

      Version of Record online: 28 AUG 2012 | DOI: 10.1002/macp.201200308

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      Atomic force microscopy of P(NIPAAm-co-DMAAm) with catechol groups for facile surface modification clearly visualized the temperature responsive transient phase transition. In addition, the temperature responsive P(NIPAAm-co-DMAAm) could be successfully exploited for the preparation of fibroblast cell sheets.

    4. Post-Modification of Organoiron Poly(alkynyl methacrylate)s with Dicobalt Hexacarbonyl (pages 2136–2145)

      Alaa S. Abd-El-Aziz, Diana J. Winram, Patrick O. Shipman, Christopher L. Rock, Mason S. Vandel and Brian O. Patrick

      Version of Record online: 31 AUG 2012 | DOI: 10.1002/macp.201200405

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      Post-modification of organoiron poly(alkynyl methacrylate)s with dicobalt hexacarbonyl gives rise to a number of polymethacrylates with either ferrocene or cationic cyclopentadienyliron moieties and cobalt complexes. Thermal analysis shows that the polymers display glass transition temperatures between 78 and 138 °C.

    5. Star-Shaped Block Copolymers by Copper-Catalyzed Azide-Alkyne Cycloaddition for Potential Drug Delivery Applications (pages 2146–2156)

      Christian von der Ehe, Kristian Kempe, Marius Bauer, Anja Baumgaertel, Martin D. Hager, Dagmar Fischer and Ulrich S. Schubert

      Version of Record online: 20 SEP 2012 | DOI: 10.1002/macp.201200307

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      Star-shaped poly(ϵ-caprolactone)-block- poly(ethylene glycol) and poly(ϵ-caprolactone)-block-poly(2-ethyl-2-oxazoine) are synthesized by linking linear poly(ethylene glycol) and poly(2-ethyl-2-oxazoline) to a 4-arm star-shaped poly(ϵ-caprolactone) core. Their ability to uptake hydrophobic molecules is tested using a hydrophobic dye as a drug model. Erythrocyte aggregation is applied as a first biological compatibility test.

    6. Effect of Degree of Branching on Properties of Photosensitive Nanoparticles as Drug-Delivery Carriers (pages 2157–2164)

      Dongjian Shi, Michiya Matsusaki, Mingqing Chen and Mitsuru Akashi

      Version of Record online: 24 SEP 2012 | DOI: 10.1002/macp.201200327

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      Photosensitive PCA–DTT nanoparticles were prepared on the basis of hyperbranched copolymers with various degrees of branching (DBs). The Michael addition, diameter, and photoresponsivity of the PCA–DTT nanoparticles were influenced by the DB. The release behavior of the encapsulated BSA was controlled by the DB in PBS. These biodegradable and photoresponsive nanoparticles would be useful as functional carriers for drug-delivery systems.

    7. Influence of the Surfactant Concentration on Miniemulsion Polymerization for the Preparation of Hybrid Nanoparticles (pages 2165–2173)

      Lena L. Hecht, Caroline Wagner, Özge Özcan, Felix Eisenbart, Karsten Köhler, Katharina Landfester and Heike P. Schuchmann

      Version of Record online: 12 SEP 2012 | DOI: 10.1002/macp.201200219

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      The ideal surfactant concentration in miniemulsion polymerization, at which neither coalescence nor secondary nucleation occur, depends not only on the type of surfactant and the droplet size but also on the particles incorporated in the droplets. Therefore, it has to be adjusted according to concentration and surface modification of the particles.

    8. Gelation Behavior of Bioabsorbable Hydrogels Consisting of Enantiomeric Mixtures of A–B–A Tri-block Copolymers of Polylactides (A) and Poly(ethylene glycol) (B) (pages 2174–2180)

      Chan Woo Lee, Tomoyuki Manoshiro, Yu-I Hsu and Yoshiharu Kimura

      Version of Record online: 17 SEP 2012 | DOI: 10.1002/macp.201200375

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      Mixing of aqueous suspensions of enantiomeric A–B–A tri-block copolymers, poly(L-lactide)-block-poly(ethylene glycol)-block-poly(L-lactide) (PLLA-PEG-PLLA) and poly(D-lactide)-block-poly(ethylene glycol)-block-poly(D-lactide) (PDLA-PEG-PDLA), causes a temperature-dependent sol–gel transition with stereocomplexation of the PLLA and PDLA blocks.

    9. Macromonomers as Well-Defined Building Blocks in the Synthesis of Hybrid Octafunctional Star-Shaped Poly(ethylene oxide)s (pages 2181–2191)

      Gladys M.-E. Pozza, Hassan Harris, Markus J. Barthel, Jürgen Vitz, Ulrich S. Schubert and Pierre J. Lutz

      Version of Record online: 31 AUG 2012 | DOI: 10.1002/macp.201200292

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      Octafunctional poly(ethylene oxide) star-shaped polymers were prepared by grafting ω-allyl PEOs (p = 1) via hydrosilylation onto octa(hydridodimethylsiloxy) octasilsesquioxane in the presence of the “Speier” catalyst. The kinetics of the grafting reaction was investigated by proton NMR. Static light scattering and MALDI–TOF MS measurements confirmed the grafting.

    10. pH-Responsive Double-Hydrophilic Block Copolymers: Synthesis and Drug Delivery Application (pages 2192–2200)

      Xiao-Hui Dai, Chun-Yan Hong and Cai-Yuan Pan

      Version of Record online: 31 AUG 2012 | DOI: 10.1002/macp.201200324

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      The pH-responsive double-hydrophilic block copolymers have been prepared by two-step RAFT copolymerization, the hydrophobic drug is attached to the core PAMA chains of the P(MEO2MA-co-OEGMA)-b-PAMA micelles via a “Schiff-base” reaction, and the control of drug release triggered by pH changes is achieved.

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