The two-phase structure of segmented block copoly(ether ester)

1983 ◽  
Vol 261 (1) ◽  
pp. 26-39 ◽  
Author(s):  
U. Bandara ◽  
M. Dr�scher
Keyword(s):  
Phase Structure ◽  
Two Phase ◽  
Ether Ester

Two-phase structure of tropical hydroclimate during Heinrich Stadial 1 and its global implications

2019 ◽  
Vol 222 ◽  
pp. 105900 ◽  
Author(s):  
Jie Huang ◽  
Shiming Wan ◽  
Anchun Li ◽  
Tiegang Li
Keyword(s):  
Phase Structure ◽  
Two Phase

scholarly journals A multi-phase model for simulations of galaxy formation

2003 ◽  
Vol 208 ◽  
pp. 273-282 ◽  
Author(s):  
Volker Springel ◽  
Lars Hernquist
Keyword(s):  
Star Formation ◽  
Galaxy Formation ◽  
Phase Structure ◽  
Formation Rate ◽  
Disk Galaxies ◽  
Two Phase ◽  
Star Forming ◽  
Hot Gas ◽  
Feedback Model ◽  
Multi Phase

We discuss SPH simulations of galaxy formation which use a hybrid method to describe a two-phase structure of the star forming ISM on unresolved scales. Our modeling includes radiative cooling, heating due to a UV background, growth of cold clouds embedded in an ambient hot gas, star formation out of cloud material, feedback due to supernovae in the form of thermal heating and cloud evaporation, starbursts that can lead to galactic outflows, and metal enrichment. Our particular model for the treatment of the two-phase structure is based on a modified and extended version of the grid-based approach of Yepes et al. (1997). We discuss the properties of the feedback model and show how it stabilizes star forming disk galaxies and reduces the cosmic star formation rate to a level consistent with current observational constraints.

Creep Properties of Ir-Based Alloy with FCC + L12 Two-Phase Structure

2003 ◽  
Vol 426-432 ◽  
pp. 1795-1800
Author(s):  
Yoko Yamabe-Mitarai ◽  
Hiroshi Harada
Keyword(s):  
Phase Structure ◽  
Two Phase ◽  
Creep Properties

Dynamic mechanical relaxations of electrospun poly(acrylonitrile-co-methyl acrylate) nanofibrous yarn

2016 ◽  
Vol 87 (18) ◽  
pp. 2193-2203 ◽  
Author(s):  
Seyed Abdolkarim Hosseini ◽  
Ning Pan ◽  
Frank Ko
Keyword(s):  
Methyl Acrylate ◽  
Phase Structure ◽  
Molecular Orientation ◽  
Polymorphic Transition ◽  
Solution Concentration ◽  
Dynamic Mechanical Properties ◽  
Two Phase ◽  
Dynamic Mechanical ◽  
Nanofibrous Yarn ◽  
Poly Acrylonitrile

The phase structure and dynamic mechanical properties of poly(acrylonitrile-co-methyl acrylate) (P(AN-co-MA)) nanofibers collected in the form of twisted yarn via the two-nozzle conjugated electrospinning method were investigated to study the effects of solution concentration and take-up velocity on the relaxation behavior of nanofibers yarn. The wide-angle X-ray diffraction analyses of P(AN-co-MA) nanofibers show a two-phase structure of nanofibers consisting of crystalline and amorphous phases and polymorphic transition from hexagonal to orthorhombic. Heating P(AN-co-MA) nanofibers at over the glass transition temperature led to an increased degree of both crystallinity and crystallite size with no polymorphic change. Three transitions (tan δ peaks) were observed in nanofibrous yarn prepared at different spinning dope concentrations and take-up speeds, except for the specimen prepared at a concentration of 14 wt% and collecting speed of 8 cm/min, wherein no α transition was observed due to improved molecular orientation. The temperature dependence of the dynamic Young’s modulus of nanofibrous yarn at different spinning dope concentrations was mainly affected by the diameter of the nanofiber as the morphological property and molecular orientation. Take-up speed was found to affect the γ and α transitions more than the β transition. Moreover, the maximum storage modulus was obtained at a take-up speed of 8 cm/min at all over recorded temperatures.

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