Macromolecular Chemistry and Physics
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Materials Science Weekly Newsletter
Recently Published Articles
- Radical Polymerization of Alkali Acrylates in Aqueous Solution
P. Drawe, M. Buback and I. Lacík
Article first published online: 29 APR 2015 | DOI: 10.1002/macp.201500075
Radical polymerization of alkali acrylates in aqueous solution are studied at 50 °C by inline near-infrared spectroscopy. It is found that the polymerization rate is reduced by ionization. The magnitude of this effect is dependent on the type and concentration of the alkali counter cation. Lithium, sodium, potassium, and rubidium alkali ion species are investigated.
- Polymer Interphase Self-Reinforcement and Strengthening Mechanisms in Low-Loaded Nanocomposite Fibers
Kenan Song, Yiying Zhang and Marilyn L. Minus
Article first published online: 29 APR 2015 | DOI: 10.1002/macp.201500011
The effect of filler concentration on structure–property relationships in polymer composites with low nanocarbon loadings is investigated. It is found that strength increases with grain/lamellae microstructural changes. As the grain/lamellae structure becomes finer, the strength improves linearly. This shows that polymeric nanocomposites can exhibit behavior analogous to metallic materials.
- Bioactive Chitosan Nanoparticles Loaded with Retinyl Palmitate: A Simple Route Using Ionotropic Gelation
Mar Fernández-Gutiérrez, Ornella Bossio, Laura G. Gómez-Mascaraque, Blanca Vázquez-Lasa and Julio San Román
Article first published online: 28 APR 2015 | DOI: 10.1002/macp.201500034
It is demonstrated that successful encapsulation of retinyl palmitate (RP) into chitosan nanoparticles can be achieved using the simple method of ionic gelation. Morphology, average diameters, and zeta potential values of nanoparticles were influenced by the amount of entrapped RP and the procedure applied. RP maintains its antioxidant activity after encapsulation. It is clear that the polyionic coacervation process offers a tool for modeling the physicochemical and antioxidant properties of the resulting nanocarriers.
- Improvement in Solubility and Molecular Assembly of Cyclopentadithiophene–Benzothiadiazole Polymer
Jungho Lee, Tomasz Marszalek, Kyu Cheol Lee, Jonggi Kim, Wojciech Pisula and Changduk Yang
Article first published online: 24 APR 2015 | DOI: 10.1002/macp.201500087
Use of the newly designed branched 5-ethylnonyl (5EN) chain provides a satisfactory processability to the PCDT-BT polymer without disrupting the π–π interactions, accompanied by an advantageous change in polymer self-assembly and backbone orientation, leading to a superior mobility, in comparison to that of the reference polymer.
- Clustering and Dissolution of Triazole Branched Poly(ethyl methylacrylate)
Jungju Ryu, Seo-Hyun Jung, Jae Hyun Sim, Hyung-il Lee and Daewon Sohn
Article first published online: 24 APR 2015 | DOI: 10.1002/macp.201400621
The temperature dependent clustering process and its gradual disruption are described as a result of time-dependent dissolution due to the chain relaxation, based on small angle neutron scattering and dynamic light scattering results. Specifically, the particular behavior of the synthesized polymer P1 is analyzed, which can be systematically controlled using temperature and time as simple triggers.