Macromolecular Chemistry and Physics
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Materials Science Weekly Newsletter
Recently Published Articles
- 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
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.
- 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
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.
- Improved Photovoltaic Performance of a Side-Chain D–A Polymer in Polymer Solar Cells by Shortening the Phenyl Spacer between the D and A Units
Wenyan Su, Qunping Fan, Manjun Xiao, Jianhua Chen, Pei Zhou, Bin Liu, Hua Tan, Yu Liu, Renqiang Yang and Weiguo Zhu
Article first published online: 25 AUG 2014 | DOI: 10.1002/macp.201400298
A novel side-chain donor–acceptor (D–A)-based copolymer of PDPAT-BDT-BT is made. A maximum power conversion efficiency of 3.27% with a Voc of 0.87 V and a fill factor (FF) of 49.8% are obtained in the PDPAT-BDT-BT-based polymer solar cells. This work indicates that the photophysical and photovoltaic performances of the side-chain D–A polymers can be improved by shortening the spacer between the D and A units in polymer solar cells.
- Impact of Catalyst on the Stability of Initiators on Au Substrate in Atom Transfer Radical Polymerization
Yongming Tang, Richard O. Osibanjo, Jessica Moore, Elyse N. Towns, Tonya L. Kuhl and Donald P. Land
Article first published online: 25 AUG 2014 | DOI: 10.1002/macp.201400230
Desorption of initiators from gold in surface-initiated atomic transfer radical polymerization (SI-ATRP) is investigated by in situ attenuated total reflectance-Fourier transform infrared (ATR-FTIR). It is found that SI-ATRP catalysts, not radical, solvent, or temperature, are dominantly responsible for the desorption of thiol-based SAMs on gold. The loss of initiator-based SAM in SI-ATRP is greatly reduced in the presence of CuCl in comparison to CuBr.
- Synthesis of Well-Defined Polystyrene Rink Amide Soluble Supports and Their Use in Peptide Synthesis
Meryem Imane Amrane, Dalila Chouikhi, Nezha Badi and Jean-François Lutz
Article first published online: 22 AUG 2014 | DOI: 10.1002/macp.201400347
A well-defined polystyrene bearing a cleavable Rink amide linker is used as soluble support for the synthesis of a model water-soluble tetrapeptide. Compared with standard solid-phase peptide synthesis, the use of soluble polymer supports allows precise characterization at each coupling step. The tetrapeptide can be efficiently cleaved by using only 10% TFA in DCM. This procedure can be employed for the study of amphiphilic biohybrid polymers.