A Robust Generalized Voronoi Graph Based SLAM for Hyper Symmetric Environment

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3-D Reconstruction Using a Touch Sensor for Mouse Stereotactic Surgery in Unstructured Environment

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Toughening of semi-IPN structured epoxy using a new PEEK-type polymer via in situ azide-alkyne click polymerization

Toughening of semi-IPN structured epoxy using a new PEEK-type polymer via in situ azide-alkyne click polymerizatio

N-chloro hydantoin functionalized polyurethane fibers toward protective cloth against chemical warfare agents

Polyurethane nanofibers functionalized by high amount of N-chloro hydantoin were prepared for the decontamination of chemical warfare agents. Azido-polyurethane was firstly synthesized using azidopolydiol with 4,40-methylenebis(phenylisocyanate) and 1,4-butanediol via step-addition polymerization. Hydantoin was introduced into the polyurethane via click reaction, followed by electrospinning and chlorination to obtain the decontaminable fibers. This N-chlorinated hydantoin-polyurethane fiber is an active decontaminable species for 2-chloroethyl ethyl sulfide and demeton-S-methyl, the simulant of chemical warfare agent. The decontamination efficiency of each exhibits 69% and 16% for 2-chloroethyl ethyl sulfide and demeton-S-methyl, respectively, with molar ratio of 1/1 for 2 h at ambient condition. This N-chlorinated hydantoin-polyurethane fiber exhibited considerable potential as the decontaminable material against toxic chemical warfare agents. (C) 2018 Elsevier Ltd. All rights reserved

A Convenient Dual-Side Anionic Initiator Based on 2,6-Luditine/s-Butyl Lithium

A Convenient Dual-Side Anionic Initiator Based on 2,6-Luditine/s-Butyl Lithiu

Epoxy resins toughened with in situ azide-alkyne polymerized polysulfones

To simultaneously improve the fracture toughness and heat resistance of a cured toughened epoxy resin along with a reduction in its viscosity during the mixing process, two novel polysulfone-type polymers are synthesized via azide-alkyne polymerization for use as toughening agents. The epoxy resin toughened with these polymers by in situ azide-alkyne polymerization during the cure process, which shows excellent processibility and based on the significantly lower viscosity (61 and 62 cP) during epoxy mixing process than that of commonly commercial polyethersulfone (PES, 127,612 cP). The novel polysulfone-type polymer toughened epoxy resin showed the advantage in excellent fracture toughness than the PES toughened epoxy. In addition, the glass transition temperature of the novel polysulfone-type polymer toughened epoxy resin is similar to that of the neat one (similar to 230 degrees C) and does not decrease, which implies excellent heat resistance of the toughened epoxy. These phenomena can be attributed to the formation of semi-interpenetrating polymer networks comprising the epoxy network and the linear polysulfone-type polymers. (C) 2017 Wiley Periodicals, Inc