Macromolecular Chemistry and Physics

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Recently Published Articles

  1. 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.

  2. 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.

  3. 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.

  4. Non-isothermal Crystallization Kinetics of Biobased Poly(ethylene 2,5-furandicarboxylate) Synthesized via the Direct Esterification Process

    Amandine Codou, Nathanael Guigo, Jesper van Berkel, Ed de Jong and Nicolas Sbirrazzuoli

    Article first published online: 25 AUG 2014 | DOI: 10.1002/macp.201400316

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    Non-isothermal crystallization kinetics of a new prospective biobased polymer, poly(ethylene 2,5-furandicarboxylate) (PEF), whose chemical structure is analogous to poly(ethylene terephthalate) (PET), is undertaken for both melt and glass crystallization by combining isoconversional analysis, the Hoffman–Lauritzen theory, and the Ozawa analysis. Change in the crystallization regimes is highlighted. The temperature at maximum crystallization rate is estimated using measurements and simulations.

  5. Biodegradable Copolyesters of Poly(hexamethylene terephthalate) Containing Bicyclic 2,4:3,5-Di-O-methylene-d-Glucarate Units

    Cristina Japu, Antxon Martínez de Ilarduya, Abdelilah Alla, M. Gracia García-Martín, Juan A. Galbis and Sebastián Muñoz-Guerra

    Article first published online: 25 AUG 2014 | DOI: 10.1002/macp.201400299

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    The partial replacement of the tere­phthalate units (T) by bicyclic acetalized glucarate units (Glux) in poly(hexamethylene terephthalate) (PHT) gives rise to biodegradable copolyesters with enhanced Tg. Compared with other cyclic acetalized aldarate units previously explored, the glucarate unit is the one rendering the largest increase in Tg.