We present the fabrication and characterization of fiber Bragg gratings (FBGs) in an endlessly single-mode microstructured polymer optical fiber (mPOF) made of humidity-insensitive high-Tg TOPAS cyclic olefin copolymer. The mPOF is the first made from grade 5013 TOPAS with a glass transition temperature of Tg = 135°C and we experimentally demonstrate high strain operation (2.5%) of the FBG at 9...

Polymers for hot melt extrusion must exhibit thermoplastic characteristics in order to permit the melt extrusion process and they must be stable at extrusion temperatures. Other relevant characteristics are: suitable glass transition temperature (Tg) of 50–180 °C, low hygroscopicity and no toxicity since larger amounts of polymer are used [1]. Extrudability of a polymer is mainly determined by ...

Thin polymer films have striking dynamical properties that differ from their bulk counterparts. With the simple geometry of a stepped polymer film on a substrate, we probe mobility above and below the glass transition temperature Tg. Above Tg the entire film flows, whereas below Tg only the near-surface region responds to the excess interfacial energy. An analytical thin-film model for flow lim...

The glass transition temperatures of AgPO3 have been reported to lie in the 163 Tg 192 °C range. These results are typical when precursors are processed at laboratory ambient. In the present work, we show that if precursors are handled in a dry ambient environment, the Tg’s steadily increase in the 181 2 Tg 254 2 °C range as the relative humidity of the ambient environment decreases. The glass ...

Glassy alloy rods with diameters up to 1.5mm exhibiting a large supercooled liquid region before crystallization and high mechanical strength were formed in Cu-Zr and Cu-Hf binary alloy systems by the copper mold casting method. The large supercooled liquid region exceeding 40K was obtained in the composition range of 30 to 70 at%Zr and 35 to 60 at%Hf. The largest value of the supercooled liqui...

156. Cryopreservation of recombinant antihemophilic Factor VIII. Effect of biopolymers. Nelly M. Tsvetkova, Omkar Joshi, Arnaud Desponds, D.Q. Wang, Paul Wu, Bayer HealthCare LLC, Berkeley, CA, USA Recombinant Factor VIII, an essential coagulation factor in the blood, is one of the most complex proteins manufactured today. Currently the only therapy for hemophilia A is life-long administration ...

Analysis of frequency dependence of spin glass transition temperatures of an Ising spin glass Feo.lTiS2 shows that power law with a finite transition temperature is the most probable formula describing the experimental data. Magnetization measurement on FellaTiS2 suggests that atomically ordered FellsTiSz is an antiferrornagnet with TN = 33 K . Various transition metals are intercalated in the ...

– The utility of a cooperative length scale for describing the dynamics of small molecule glass-formers is shown. Molecular Dynamics and Monte Carlo simulations reveal a distribution of cooperatively moving fractal events below the temperature TA at which dynamics become caged. Guided by these results, four straightforward methods emerge to recognize TA in experimental data and quantify the len...

It was demonstrated that the combination of the almost water insoluble active pharmaceutical ingredient (API) ibuprofen with the biocompatible 1-ethanol-3-methylimidazolium [C2OHMIM] cation of an ionic liquid (IL) leads to a highly water miscible IL-API with a solubility increased by around 5 orders of magnitude. Its phase transformations, as crystallization and glass transition, are highly sen...