Macromolecular Chemistry and Physics

Cover image for Vol. 214 Issue 1

January 11, 2013

Volume 214, Issue 1

Pages 1–116

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      Macromol. Chem. Phys. 1/2013 (page 1)

      Susete N. Fernandes, Yong Geng, Silvia Vignolini, Beverley J. Glover, Ana C. Trindade, João P. Canejo, Pedro L. Almeida, Pedro Brogueira and Maria H. Godinho

      Version of Record online: 2 JAN 2013 | DOI: 10.1002/macp.201370001

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      Front Cover: Cellulose gratings are responsible for iridescence: shear, transparent, free-standing cellulosic films prepared from liquid-crystalline solutions can develop iridescence arising from the modulation of the film surface, similar to that found in the petals of the “Queen of the Night” tulip variety. Further details can be found in the article by S. N. Fernandes, Y. Geng, S. Vignolini, B. J. Glover, A. C. Trindade, J. P. Canejo, P. L. Almeida, P. Brogueira, and M. H. Godinho* on page 25.

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    1. Macromol. Chem. Phys. 1/2013

      Version of Record online: 2 JAN 2013 | DOI: 10.1002/macp.201370002

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      Macromol. Chem. Phys. 1/2013 (pages 3–6)

      Version of Record online: 2 JAN 2013 | DOI: 10.1002/macp.201370003

  4. Talents & Trends

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    1. Thieno[3,4-c]pyrrole-4,6-dione-Based Polymers for Optoelectronic Applications (pages 7–16)

      Agnieszka Pron, Philippe Berrouard and Mario Leclerc

      Version of Record online: 20 NOV 2012 | DOI: 10.1002/macp.201200549

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      Recently, push–pull type conjugated polymers consisting of thieno[3,4-c]pyrrole-4,6-dione (TPD) motif as an electron-deficient moiety gained a lot of attention for applications in plastic electronics. For instance, incorporation of TPD-based polymers into bulk heterojunction (BHJ) solar cells resulted in devices with power conversion efficiency (PCE) up to 8.5%. This Trend Article summarizes current research on such TPD-based polymers with special emphasis on structure–property relationships.

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      A New Class of Ultra-Efficient Supramolecular Nucleating Agents for Isotactic Polypropylene (pages 17–24)

      Frank Abraham, Roman Kress, Paul Smith and Hans-Werner Schmidt

      Version of Record online: 20 NOV 2012 | DOI: 10.1002/macp.201200487

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      The synthesis and nucleating properties of a new family of 2,4,6-trimethyl-1,3,5-benzenetrisamides with different peripheral substitutents are presented, some of which are capable of ultra-efficient nucleation isotactic polypropylene at weight fractions as low as 0.00003 wt%.

    2. Structural Color and Iridescence in Transparent Sheared Cellulosic Films (pages 25–32)

      Susete N. Fernandes, Yong Geng, Silvia Vignolini, Beverley J. Glover, Ana C. Trindade, João P. Canejo, Pedro L. Almeida, Pedro Brogueira and Maria H. Godinho

      Version of Record online: 21 NOV 2012 | DOI: 10.1002/macp.201200351

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      Shear transparent free-standing cellulosic films, prepared from liquid-crystalline solutions, can develop iridescence arising from the modulation of the surface of the films, similar to that found in the petals of the tulip variety “Queen of the Night.”

    3. Reactivity of the Dicationic Ruthenium–Alkylidene Complex [Ru(DMF)3(IMesH2)(=CH—2—(2—PrO)—C6H4)],2+(BF4)2] in Ring-Opening Metathesis and Cyclopolymerization (pages 33–40)

      Benjamin Autenrieth, Emily Baird Anderson, Dongren Wang and Michael R. Buchmeiser

      Version of Record online: 20 NOV 2012 | DOI: 10.1002/macp.201200544

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      The highly electrophilic dicationic Ru–alkylidene complex [Ru(DMF)3(1,3-dimesitylimidazolin-2-ylidene)(=CH—2—(2—PrO)—C6H4)]2+(BF4)2] was used in the ring-opening metathesis polymerization as well as in the cyclopolymerization of 1,6-heptadiynes. In the presence of ionic monomers containing coordinating anions, a rapid change in the nature of the propagating alkylidene from a dicationic to a neutral occurs.

    4. Syndiotactic Polystyrene Films with Different Uniplanar Orientations: Additional Information on Crystal Phase Transitions (pages 41–45)

      Paola Rizzo, Alexandra R. Albunia and Gaetano Guerra

      Version of Record online: 19 NOV 2012 | DOI: 10.1002/macp.201200275

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      Information relative to the structure of the helical mesomorphic phase of syndiotactic polystyrene has been obtained by X-ray diffraction on δ form films showing uniplanar orientations, and subjected to annealing procedures leading to the γ phase. Polymer films with different uniplanar orientations allow a better separation of the diffraction peaks and hence allow more detailed information concerning polymer crystalline phases and crystal phase transitions to be obtained.

    5. New Amphiphilic Conjugates of Amino–Poly(ethylene glycols) With Lipoamino Acids as Surface Modifiers of Colloidal Drug Carriers (pages 46–55)

      Rosario Pignatello, Valentina Pantò, Giuseppe Impallomeni, Giovanni Marco Carnemolla, Claudia Carbone and Giovanni Puglisi

      Version of Record online: 15 NOV 2012 | DOI: 10.1002/macp.201200476

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      Amphiphilic conjugates of amino–PEG and α-lipoamino acids (LAA) were synthetized and characterized. These polymers are planned as alternative surface coating materials than phospholipid–PEGs, to produce stealth polymer and lipid nanocarriers. The interaction of PEG–LAA conjugates with DPPC liposomes (biomembrane model) was studied by DSC.

    6. Glycidyl 4-Functionalized-1,2,3-Triazole Polymers (pages 56–61)

      Dian Liu, Yijun Zheng, Werner Steffen, Manfred Wagner, Hans-Jürgen Butt and Taichi Ikeda

      Version of Record online: 15 NOV 2012 | DOI: 10.1002/macp.201200563

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      Glycidyl 4-functionalized 1,2,3-triazole polymers (Functionalized GTP) were synthesized as a series of novel polymers by click functionalization of glycidyl azide polymer (GAP). Quantitative conversion of the glycidyl polymer side groups could be achieved. Functionalized GTP expands not only the application field of GAP toward non-explosive materials, but also the variation of poly(ethylene glycol) derivatives with different side groups.

    7. Highly Filled Polystyrene/Laponite Hybrid Nanoparticles Prepared Using the Ad-miniemulsion Polymerisation Technique (pages 62–75)

      Eddson Zengeni, Patrice C. Hartmann and Harald Pasch

      Version of Record online: 19 NOV 2012 | DOI: 10.1002/macp.201200330

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      The use of the ad-miniemulsion polymerisation technique to prepare highly filled polystyrene/Laponite hybrid latexes with up to 50 wt% clay content is described. The latex and film morphology of these hybrids latexes have been examined. The extent of clay exfoliation and physical properties of the nanocomposites has been evaluated in relation to clay content.

    8. Facile Synthesis of Well-Defined Telechelic Alkyne-Terminated Polystyrene in Polar Media Using ATRP With Mixed Fe/Cu Transition Metal Catalyst (pages 76–84)

      Nuno Rocha, Patrícia V. Mendonça, Joana P. Mendes, Pedro N. Simões, Anatoliy V. Popov, Tamaz Guliashvili, Arménio C. Serra and Jorge F. J. Coelho

      Version of Record online: 22 NOV 2012 | DOI: 10.1002/macp.201200352

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      A cost-effective and environmentally attractive Fe(0)/CuBr2 catalytic system is used for atom transfer radical polymerization of styrene at, for the first time, suitable polymerization rates. The obtained polystyrenes (PS) have narrow molecular weight distributions and controlled telechelic structure, which can be used for further reinitiation and functionalization reactions, and, therefore, can be of great interest in PS-based macromolecular engineering.

    9. A New Insight Into the Mechanism of the Ring-Opening Polymerization of Trimethylene Carbonate Catalyzed by Methanesulfonic Acid (pages 85–93)

      João M. Campos, Maria R. Ribeiro, Maria F. Ribeiro, Alain Deffieux and Frédéric Peruch

      Version of Record online: 19 NOV 2012 | DOI: 10.1002/macp.201200433

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      The ring-opening polymerization (ROP) of trimethylene carbonate (TMC) initiated by a monofunctional alcohol and catalyzed by methanesulfonic acid is investigated for high monomer/initiator ratios. This emphasizes the side propagation and reveals additional features of the combined activated monomer/active chain-end (AM/ACE) mechanism through size-exclusion chromatography (SEC) analysis. The results suggest that the known combined AM/ACE mechanism may instead be a bidirectional AM mechanism.

    10. Telechelic Polymers by Visible-Light-Induced Radical Coupling (pages 94–98)

      Birol Iskin, Gorkem Yilmaz and Yusuf Yagci

      Version of Record online: 23 NOV 2012 | DOI: 10.1002/macp.201200491

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      Visible light irradiation of a toluene solution of bromo functional polystyrene prepared by ATRP with bromo functional ester compound in the presence of dimanganese decacarbonyl leads to the formation telechelic through radical–radical coupling. Adaptability of the process for the preparation of mono- and bifunctional telechelic is also demonstrated under variety of conditions of ATRP and coupling steps.

    11. Effect and Mechanism of Association of 8-Hydroxy-1,3,6-pyrenetrisulfonic Acid to Chitosan: Physicochemical Properties of the Complex (pages 99–106)

      Ramon Barnadas-Rodríguez

      Version of Record online: 20 NOV 2012 | DOI: 10.1002/macp.201200266

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      The effect of the acidic dye pyranine on chitosan and the physicochemical properties of the resulting complex that they form are investigated. The strong electrostatic interaction among the sulfonate and the amino groups of pyranine and chitosan, respectively, results in a cooperative association of the dye to the macromolecule. The dye causes the screening of the chitosan charge and promotes its aggregation, probably, acting as a cross-linker.

    12. Effect of Short-Chain Branching on the Melt Behavior of Polypropylene Under Small-Amplitude Oscillatory Shear Conditions (pages 107–116)

      Humberto Palza, Raúl Quijada and Manfred Wilhelm

      Version of Record online: 29 NOV 2012 | DOI: 10.1002/macp.201200391

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      The presence of short chain branching drastically changes the main melt properties of polypropylene depending on the size of the branch. Our experimental findings are supported by models based on reptation theory.

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