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23.627 Aktuelle Fachpublikationen zum Thema Chemikalien

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Effect of copolymer sequence on structure and relaxation times near a nanoparticle surface

03.07.2018 | Alex Trazkovich; Mitchell Wendt; Lisa Hall, Soft Matter, 2018

We simulate a simple nanocomposite consisting of a single spherical nanoparticle surrounded by coarse-grained polymer chains. The polymers are composed of two different monomer types that differ only in their interaction strengths with the nanoparticle. We examine the effect of adjusting ...

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Unravelling the role of polyols with increasing carbon chain length and OH groups on phase transition behavior of PNIPAM

03.07.2018 | Payal Narang; Pannuru Venkatesu, New Journal of Chemistry, 2018

In advance field of pharmaceutical, agricultural and biomedical research, thermoresponsive polymers (TRPs) are potential and candidates which shows their conformational transition at a particular temperature. The conformational transition in TRPs depends on their intermolecular interactions with ...

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Secondary dialkylammonium salt/crown ether [2]pseudorotaxanes as nanostructuring platforms for proton transport

03.07.2018 | Lijie Li; Lipeng He; Binghua Wang; Peng Ge; Lei Jing; Haomin Liu; Chenliang Gong; Bin Zhang; Junhu Zhang; Weifeng Bu, Chemical Communication, 2018

As connected by multivalent secondary dialkylammonium salt/crown ether [2]pseudorotaxanes, supramolecular polymer networks have been obtained by mixing surfactant-encapsulated clusters with dibenzo[24]crown-8 groups and star polymers end functionalized with dibenzylammonium ions. This picture ...

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Characterising knotting properties of polymers in nanochannels

03.07.2018 | Nicholas Beaton; Jeremy Eng; Kai Ishihara; Koya Shimokawa; Christine Soteros, Soft Matter, 2018

Using a lattice model of polymers in a tube, we define one way to characterise different configurations of a given knot as either 'local' or 'non-local', based on a standard approach for measuring the 'size' of a knot within a knotted polymer chain. The method involves associating knot-types to ...

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Silkworm silk-based materials and devices generated using bio-nanotechnology

03.07.2018 | Wenwen Huang; Shengjie Ling; Chunmei Li; Fiorenzo G. Omenetto; David L. Kaplan, Chemical Society Reviews, 2018

Silks are natural fibrous protein polymers that are spun by silkworms and spiders. Among silk variants, there has been increasing interest devoted to the silkworm silk of B. mori, due to its availability in large quantities along with its unique material properties. Silk fibroin can be extracted ...

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Splay–density coupling in semiflexible main-chain nematic polymers with hairpins

03.07.2018 | Aleksandar Popadić; Daniel Svenšek; Rudolf Podgornik; Kostas Daoulas; Matej Praprotnik, Soft Matter, 2018

A main-chain nematic polymer melt/solution exhibits macroscopic orientational order of main polymer chains, i.e., a preferred (nematic) direction. It has long been known that in such polymeric liquid crystals spatial density/concentration variations and distortions of the nematic direction are ...

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The influence of microcapsules with a partially filled structure on the damping properties of an epoxy resin

03.07.2018 | Xiaoyu Shi; Yilong Song; Zhenzhen Cai; Xuesong Wang; Danfeng Cao; Qiuli Cheng; Jiawei Zou; Zuosen Shi; Zhanchen Cui, New Journal of Chemistry, 2018

Liquid viscoelastic polymers are promising materials for vibration damping due to their superior damping properties. However, using liquid polymers as materials for this purpose is challenging because liquid polymers cannot be used as normal materials in their amorphous fluid state. This study ...

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Metal analysis in polymers using Tandem LA-ICP-MS/LIBS: Eliminating matrix effects using multivariate calibration

03.07.2018 | Maximilian Bonta; Andreas Limbeck, Journal of Analytical Atomic Spectrometry, 2018

Nowadays, metal analysis in polymers is experiencing growing interest due to increased environmental regulations and the need for sustainable polymer recycling strategies. Quick and reliable analyses are required to fulfill the demands of today’s industry. Due to high chemical inertness of most ...

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Materials, Vol. 11, Pages 1125: Therapeutic Contact Lenses with Polymeric Vehicles for Ocular Drug Delivery: A Review

01.07.2018 | Choi, Seung Woo; Kim, Jaeyun, Materials, 2018

Materials, Vol. 11, Pages 1125: Therapeutic Contact Lenses with Polymeric Vehicles for Ocular Drug Delivery: A Review Materials doi: 10.3390/ma11071125 Authors: Seung Woo Choi Jaeyun Kim The eye has many barriers with specific anatomies that make it difficult to deliver drugs to ...

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Entropy, Vol. 20, Pages 501: Entropy Driven Phase Transition in Polymer Gels: Mean Field Theory

30.06.2018 | Kaufman, Miron, Entropy, 2018

Entropy, Vol. 20, Pages 501: Entropy Driven Phase Transition in Polymer Gels: Mean Field Theory Entropy doi: 10.3390/e20070501 Authors: Miron Kaufman We present a mean field model of a gel consisting of P polymers, each of length L and Nz polyfunctional monomers. Each polyfunctional ...

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