Physical Aging Phenomena in Poly(tert-butylacetylene) Solvent Cast Films: Influence of Operating Conditions

1999 ◽  
pp. 85-94 ◽  
Author(s):  
G. Costa ◽  
C. Iurilli ◽  
B. Cavazza ◽  
A. Turturro
Keyword(s):  
Physical Aging ◽  
Operating Conditions ◽  
Cast Films ◽  
Solvent Cast ◽  
Aging Phenomena

scholarly journals Effect of fabrication technique on the crystalline phase and electrical properties of PVDF films

2015 ◽  
Vol 33 (1) ◽  
pp. 157-162 ◽  
Author(s):  
P. K. Mahato ◽  
A. Seal ◽  
S. Garain ◽  
S. Sen
Keyword(s):  
Polyvinylidene Fluoride ◽  
Tape Casting ◽  
Dimethyl Formamide ◽  
Pvdf Film ◽  
X Ray Diffraction ◽  
Β Phase ◽  
Cast Films ◽  
Solvent Cast ◽  
Ft Ir ◽  
Ferroelectric Hysteresis

AbstractThe effect of different fabrication techniques on the formation of electroactive β-phase polyvinylidene fluoride (PVDF) has been investigated. Films with varying concentration of PVDF and solvent - dimethyl formamide (DMF) were synthesized by tape casting and solvent casting techniques. The piezoelectric β-phase as well as non polar β-phase were observed for both the tape cast and solvent cast films from X-ray diffraction (XRD) micrographs and Fourier transform infra-red spectroscopy (FT-IR) spectra. A maximum percentage (80 %) of β-phase was obtained from FT-IR analysis for a solvent cast PVDF film. The surface morphology of the PVDF films was analyzed by FESEM imaging. The dielectric properties as a function of temperature and frequency and the ferroelectric hysteresis loop as a function of voltage were measured. An enhancement in the value of the dielectric constant and polarization was obtained in solvent cast films.

Comparison of thein vitrorelease characteristics of mucosal freeze-dried wafers and solvent-cast films containing an insoluble drug

2011 ◽  
Vol 38 (1) ◽  
pp. 47-54 ◽  
Author(s):  
Joshua S. Boateng ◽  
Kerr H. Matthews ◽  
Anthony D. Auffret ◽  
Mike J. Humphrey ◽  
Gillian M. Eccleston ◽  
...  
Keyword(s):  
Cast Films ◽  
Freeze Dried ◽  
Solvent Cast

Physical aging phenomena in silica and glass beads filled elastomers (EPDM)

1996 ◽  
Vol 108 (1) ◽  
pp. 147-161 ◽  
Author(s):  
B. Haidar ◽  
H. Salah Deradji ◽  
A. Vidal ◽  
E. Papirer
Keyword(s):  
Physical Aging ◽  
Glass Beads ◽  
Filled Elastomers ◽  
Aging Phenomena

Studies on polymer latex films: IV. Comparison of the permeability of latex and solvent-cast films

1992 ◽  
Vol 27 (4) ◽  
pp. 305-308 ◽  
Author(s):  
B. J. Roulstone ◽  
M. C. Wilkinson ◽  
J. Hearn
Keyword(s):  
Latex Films ◽  
Cast Films ◽  
Solvent Cast ◽  
Polymer Latex

In vitro drug release studies of polymeric freeze-dried wafers and solvent-cast films using paracetamol as a model soluble drug

2009 ◽  
Vol 378 (1-2) ◽  
pp. 66-72 ◽  
Author(s):  
Joshua S. Boateng ◽  
Kerr H. Matthews ◽  
Anthony D. Auffret ◽  
Mike J. Humphrey ◽  
Howard N. Stevens ◽  
...  
Keyword(s):  
Drug Release ◽  
In Vitro Drug Release ◽  
Cast Films ◽  
Freeze Dried ◽  
Release Studies ◽  
Solvent Cast

scholarly journals Challenges in Membrane Process for Gas Separation from Natural Gas

2021 ◽  
Vol 25 (2) ◽  
pp. 89-105
Author(s):  
K. Farahdila ◽  
P. S. Goh ◽  
A. F. Ismail ◽  
N. F. W. M. Wan ◽  
H. M. H. Mohd ◽  
...  
Keyword(s):  
Natural Gas ◽  
Cost Effective ◽  
Operating Conditions ◽  
Competitive Sorption ◽  
Co2 Removal ◽  
Membrane Performance ◽  
Selective Membrane ◽  
Proper Design ◽  
Pre Treatment ◽  
Aging Phenomena

Membrane technology is cost effective solution for CO2 removal from natural gas. However, there is challenges during its application depending on the polymer material characteristic. Understanding on the polymer fundamental and transport properties, will enable proper design of pre-treatment and operating conditions that suits its capability envelope. Diffusivity selective membrane favors high pressure and high temperature conditions and vice versa for solubility selective polymer. On top of that, the robustness and durability of the resultant membrane, need to be evaluated with multicomponent mixture to understand the effect of competitive sorption, plasticization and aging phenomena that will seriously impacting the membrane performance during its application.

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