Macromolecular Chemistry and Physics
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Recently Published Articles
- Enhanced Performance of Graphene–Epoxy Flexible Capacitors by Means of Ceramic Fillers
Marco Sangermano, Gianfranco Buzzerio, Rita Rizzoli, Luca Ortolani, Vittorio Morandi, Fabrizio Pirri and Alessandro Chiolerio
Article first published online: 30 JAN 2015 | DOI: 10.1002/macp.201400588
Graphene–epoxy flexible capacitors are prepared by graphene–polymer transfer and bonding via UV-cured epoxy adhesive. Ceramic fillers are dispersed into the epoxy resin with the aim of enhancing the capacitive behavior of the final device. Nanoparticle-filled parallel plate capacitors are shown to have superior performance, up to two orders of magnitude better than unfilled samples.
- Synthesis of Novel Chain-End-Functionalized Polyethylenes via Thiol-ene Click Chemistry
Ying Li, Yongjie Zhang, Qian Li, Huayi Li, Shuirong Zheng and Youliang Hu
Article first published online: 29 JAN 2015 | DOI: 10.1002/macp.201400454
A library of low-molecular-weight, narrow-molecular-weight-distribution chain-end-functionalized polyethylenes (Cef-PEs) is prepared highly selectively and efficiently by thiol-ene addition of vinyl-terminated polyethylene (v-PE) with mercaptans under mild conditions. The conversions of all the reactions are up to 95%–100%. All the Cef-PEs are characterized by NMR, GPC, DSC, FT-IR, and TGA. It is found that alkaline mercaptans and solvents were adverse to the thiol-ene click reactions.
- Quantitatively Probing Cross-Termination in RAFT Polymerization by an Externally Applied Magnetic Field
Ling Lv, Jian Zhou, Gang Zou and Qijin Zhang
Article first published online: 27 JAN 2015 | DOI: 10.1002/macp.201400531
Bulk reversible addition-fragmentation chain transfer polymerizations (RAFTPs) of styrene (St) are performed, mediated by (2-cyano-2-propyl)dithiobenzoate (CPDB) and S-1-dodecyl-S-(α, α′-dimethyl-α′′-acetic acid)trithiocarbonate (DDMAT) under different magnetic field strengths. A quantitative parameter RM is proposed to evaluate the polymerization rate retardation due to cross-termination. Calculated RM values for CPDB- and DDMAT-mediated bulk RAFTP of St demonstrate an efficient way to probe cross-termination in situ.
- Supramolecular Assembly-Assisted Synthesis of Responsive Polymeric Materials with Controlled Chain Topologies
Jinming Hu and Shiyong Liu
Article first published online: 26 JAN 2015 | DOI: 10.1002/macp.201400578
Recent advances concerning the fabrication of stimuli-responsive polymeric materials under the assistance of supramolecular self-assembly are summarized. The templated synthesis of linear (multiblock) copolymers, non-linear shaped copolymers, as well as crosslinked nanostructures on the basis of supramolecular assemblies is discussed.
- In Vitro Platelet Adhesion of PNaAMPS/PAAm and PNaAMPS/PDMAAm Double-Network Hydrogels
Wen Jiang Zheng, Zhen Qi Liu, Feng Xu, Jie Gao, Yong Mei Chen, Jian Ping Gong and Yoshihito Osada
Article first published online: 23 JAN 2015 | DOI: 10.1002/macp.201400481
Human platelet adhesion on the surface of double-network (DN) hydrogels is investigated under static conditions in vitro. The numbers of adherent platelet on poly (sodium 2-acrylamido-2-methyl-propanesulfonate) (PNaAMPS)/poly acrylamide (PAAm) and PNaAMPS/poly (N,N'-dimethylacrylamide) (PDMAAm) hydrogels are far less than that on the polyethylene terephthalate (PET) and the negatively charged PNaAMPS hydrogels. The platelet adhesion is affected by the chemical component, zeta potential, and serum proteins adsorption of the hydrogel.