Macromolecular Chemistry and Physics
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Best of Macromolecular Journals
Best of Macros 2017 is now online. Click here to read about the selected articles and their authors.
Recently Published Articles
- Ethylene Polymerization over MgCl2/SiO2 Bi-Supported Ziegler–Natta Hybrid Titanium/Vanadium Catalysts
Ting Fu, Zhen Liu, Ruihua Cheng, Xuelian He, Zhou Tian and Boping Liu
Version of Record online: 28 APR 2017 | DOI: 10.1002/macp.201700027
MgCl2/SiO2 bi-supported Ziegler–Natta hybrid titanium/vanadium catalysts are synthesized with magnesium acetate as Mg source under different reaction sequences with TiCl4 and VOCl3. The one-step coreaction with TiCl4 and VOCl3 is better than the two-step reaction method for the hybrid catalyst system in catalytic activity, hydrogen response, and 1-hexene incorporation.
- Synthesis of Well-Defined Polymer Brushes from Silicon Wafers via Surface-Initiated seATRP
Paweł Chmielarz, Pawel Krys, Zongyu Wang, Yi Wang and Krzysztof Matyjaszewski
Version of Record online: 28 APR 2017 | DOI: 10.1002/macp.201700106
The synthesis of densely grafted (co)polymer brushes is achieved from silicon wafer surfaces via a surface-initiated simplified electrochemically mediated atom transfer radical polymerization under constant potential/current electrolysis conditions. The well-controlled characteristic of the system allows an extension of the grafted poly(n-butyl acrylate)/poly(2-dimethylaminoethyl methacrylate) chains with a second block of PtBA. Grafting densities up to 0.93 nm−2 are obtained.
- A New Four-Arm Organosiloxane with Thermopolymerizable Trifluorovinyl ether Groups: Synthesis and Conversion to the Polymer with both Low Dielectric Constant and Low Water Uptake
Yumeng Xin, Jiajia Wang, Kaikai Jin, Yijie Luo, Junfeng Zhou, Yuanqiang Wang, Jing Sun, Shijun Zheng and Qiang Fang
Version of Record online: 26 APR 2017 | DOI: 10.1002/macp.201700010
A new fluoro-containing polysiloxane showing low dielectric constant, low water uptake, high transparency, and high thermostability is successfully synthesized by direct thermocrosslinking of a four-arm organosiloxane having thermopolymerizable trifluorovinyl ether groups.
- Structure Formation of Binary Blends of Amphiphilic Block Copolymers in Solution and in Bulk
Maryam Radjabian, Clarissa Abetz, Birgit Fischer, Andreas Meyer, Brigitte Lademann and Volker Abetz
Version of Record online: 25 APR 2017 | DOI: 10.1002/macp.201600587
Solutions of block copolymer blends show mixed microdomains above the critical micelle concentration and show a long period in the bulk, which depends on the number averaged molecular weight with a power law. This scaling behavior differs from the scaling behavior of the surface structure of integral asymmetric membranes made from similar blends.
- ABA and BAB Triblock Copolymers Based on 2-Methyl-2-oxazoline and 2-n-Propyl-2-oxazoline: Synthesis and Thermoresponsive Behavior in Water
Anna Zahoranová, Miroslav Mrlík, Katarína Tomanová, Juraj Kronek and Robert Luxenhofer
Version of Record online: 18 APR 2017 | DOI: 10.1002/macp.201700031
The preparation of triblock copolymers composed of hydrophilic 2-methyl-2-oxazoline and thermoresponsive 2-n-propyl-2-oxazoline is described. The copolymers exhibit temperature-driven micellization and aggregation, as well as temperature-induced increase in viscosity. The thermoresponsive behavior in water depends on composition, molar mass, concentration, and position of blocks.