Macromolecular Chemistry and Physics

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Recently Published Articles

  1. Tracer Diffusion in Heterogeneous Polymer Networks

    Fany Di Lorenzo and Sebastian Seiffert

    Article first published online: 1 SEP 2014 | DOI: 10.1002/macp.201400317

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    The diffusion of linear polymer chains in swollen polymer networks with different extents of spatial heterogeneity of their crosslinking density is studied by fluorescence recovery after photobleaching. In addition, these gels are probed by static light scattering and shear rheology. Spatial heterogeneity decreases the elasticity of swollen polymer networks, but has no marked impact on the diffusivity of linear tracer chains.

  2. In-Solution Structural Considerations by 1H NMR and Solid-State Thermal Properties of Inulin-d-α-Tocopherol Succinate (INVITE) Micelles as Drug Delivery Systems for Hydrophobic Drugs

    Laura Catenacci, Delia Mandracchia, Milena Sorrenti, Lino Colombo, Massimo Serra and Giuseppe Tripodo

    Article first published online: 29 AUG 2014 | DOI: 10.1002/macp.201400342

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    As indicated in 1H NMR studies, the self-assembly behaviors of Inulin-d-α-tocopherol succinate (INVITE) amphiphilic polymers are ascribed to specific π–π interactions between the aromatic regions of d-α-tocopherol rather than to hydrophobic interactions between the alkyl chains of the d-α-tocopherol moieties. The physical stability of the obtained micelles, as evidenced by DSC, thermogravimetric analysis (TGA), and dynamic light scattering (DLS) analyses, supports that these systems are valuable drug delivery systems.

  3. iPP–sPP Stereoblocks or Blends? Studies on the Synthesis of Isotactic–Syndiotactic Polypropylene Using Single C1-Symmetric {Ph2C-(Flu)(3-Me3Si-Cp)}ZrR2 Metallocene Precatalysts

    Gabriel Theurkauff, Thierry Roisnel, Jeroen Waassenaar, Jean-François Carpentier and Evgeny Kirillov

    Article first published online: 28 AUG 2014 | DOI: 10.1002/macp.201400338

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    Polymerization of propylene using single C1-symmetric {Ph2C-(Flu)(3-Me3Si-Cp)}ZrR2/cocatalyst (R = Cl, cocatalyst = MAO; R = Me, cocatalyst = [PhNMe2H]+[B(C6F5)4]/iBu3Al) combinations leads to blends (no stereo­blocks) made of major isotactic (iPP) and minor syndiotactic (sPP) polymer fractions. The syndiotactic component is proposed to originate from desilylated species, formed at the precatalyst synthetic step, and presumably also during the course of polymerization.

  4. Hybrid Poly(aryl ether sulfone amide)s for Advanced Thermoplastic Composites

    Frank Gardea, Jeannette M. Garcia, Dylan J. Boday, Krishna M. Bajjuri, Mohammad Naraghi and James L. Hedrick

    Article first published online: 28 AUG 2014 | DOI: 10.1002/macp.201400267

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    The depolymerization of poly(ethylene terepthalate) (PET) through the use of an organic catalyst allows access to rigid, amide-containing functional monomers amendable toward nucleophilic aromatic substitution (SNAr) polycondensations. The resulting poly(aryl ether sulfone amide)s (PAESAs) demonstrate high modulus and improved properties.

  5. Improvement in Power Conversion Efficiency and Performance of P3HT/PCBM Solar Cells Using Dithiafulvalene-Based π-Conjugated Oligomers

    Po-Chih Yang, Hua-Wen Wen, Cheng-Chieh Huang, Zheng-Huie Yang and Hung-Lun Liao

    Article first published online: 28 AUG 2014 | DOI: 10.1002/macp.201400307

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    Three dithiafulvalene (DTF)-based oligo­mers as a dopant for poly(3-hexylthiophene) P3HT/[6,6]-phenyl-C61butyric acid methyl ester (PCBM) solar cells are developed by incorporating a π-conjugated DTF unit that serves as an electron-rich donor in the main chain. Using poly[2-(9H-fluoren-9-ylidene)-4,5-bis(hexylthio)-1,3-dithiole-ran-(2,1,3-benzothiadiazole)] (PTBT) as a dopant in bulk heterojunction (BHJ) solar cells improves the charge-carrier mobilities, the open-circuit voltage, and the stability of the devices.