Isothermal and isobaric PVT-measurements of anionic polystyrenes

1996 ◽  
Vol 46 (3-4) ◽  
pp. 973-983 ◽  
Author(s):  
A. Eckstein ◽  
H. A. Schneider
Keyword(s):  
Pvt Measurements

Design of Equilibrium Cells for Phase Equilibria and PVT Measurements in Large Ranges of Temperatures and Pressures. I. Vapor–Liquid–Liquid Equilibria

2016 ◽  
Vol 61 (8) ◽  
pp. 2700-2711 ◽  
Author(s):  
Petri Uusi-Kyyny ◽  
Simona Ionita ◽  
Muhammad Saad Qureshi ◽  
Ville Alopaeus ◽  
Dominique Richon
Keyword(s):  
Phase Equilibria ◽  
Pvt Measurements ◽  
Vapor Liquid

Compressed Liquid Density and Vapor Phase PvT Measurements of trans-1-Chloro-3,3,3-trifluoroprop-1-ene [R1233zd(E)]

2017 ◽  
Vol 63 (1) ◽  
pp. 225-232 ◽  
Author(s):  
Laura Fedele ◽  
Mariano Pierantozzi ◽  
Giovanni Di Nicola ◽  
J. Steven Brown ◽  
Sergio Bobbo
Keyword(s):  
Vapor Phase ◽  
Liquid Density ◽  
Compressed Liquid ◽  
Pvt Measurements

Microfluidic Platform for PVT Measurements

2014 ◽  
Author(s):  
Shahnawaz Molla ◽  
Farshid Mostowfi
Keyword(s):  
Microfluidic Platform ◽  
Pvt Measurements

Fluorine Compatible Apparatus for Accurate PVT Measurements

1970 ◽  
Vol 41 (8) ◽  
pp. 1223-1227 ◽  
Author(s):  
G. C. Straty ◽  
Rolf Prydz
Keyword(s):  
Pvt Measurements

PvT Measurements of trans-1,3,3,3-Tetrafluoroprop-1-ene + Methane and trans-1,3,3,3-Tetrafluoroprop-1-ene + Nitrogen Binary Pairs

2014 ◽  
Vol 59 (11) ◽  
pp. 3798-3804 ◽  
Author(s):  
J. Steven Brown ◽  
Francesco Corvaro ◽  
Giovanni Di Nicola ◽  
Giuliano Giuliani ◽  
Marco Pacetti
Keyword(s):  
Pvt Measurements

GERG round-robin test of Z-meters, a Burnett apparatus, and an interferometric device for pVT measurements

1990 ◽  
Vol 11 (1) ◽  
pp. 157-168 ◽  
Author(s):  
M. Jaeschke ◽  
S. Audibert ◽  
P. van Caneghem ◽  
A. E. Humphreys ◽  
R. Janssen-van Rosmalen ◽  
...  
Keyword(s):  
Round Robin ◽  
Round Robin Test ◽  
Burnett Apparatus ◽  
Pvt Measurements

PVT Measurements on 3-Cyanobenzyl 2,5-bis(4-n-octyloxybenzoyl- oxy)benzoate up to 250 MPa and 423 K

2000 ◽  
Vol 55 (9-10) ◽  
pp. 823-827
Author(s):  
A. Würflinger ◽  
M. Sandmann ◽  
W. Weissflog
Keyword(s):  
Liquid Crystals ◽  
Volume Changes ◽  
Clapeyron Equation ◽  
Enthalpy Changes ◽  
Volume Entropy ◽  
Pvt Measurements ◽  
Transition Entropy

Abstract P, Vm , T data have been measured for the nematic and isotropic phases of 3-cyanobenzyl 2,5-bis (4-n-octyloxybenzoyloxy)benzoate between 273 and 423 K and up to 250 MPa. The volume changes accompanying the crystal -nematic and nematic -isotropic transitions have been determined. The cor-responding enthalpy changes have been calculated using the Clausius-Clapeyron equation. The p, V m , T data enable also to estimate the volume entropy for the nematic-isotropic transition. It is found that the configurational part of the transition entropy amounts to 80%, this portion being distinctly larger than found in previous studies for conventional rod-like liquid crystals.

pvT-Behavior of Polymers under Processing Conditions and Implementation in the Process Simulation

2015 ◽  
Vol 825-826 ◽  
pp. 677-684 ◽  
Author(s):  
Rotraud Freytag ◽  
José Antonio Pérez Gil ◽  
Reinhard Forstner
Keyword(s):  
Process Simulation ◽  
Specific Volume ◽  
High Performance ◽  
Process Conditions ◽  
Crystalline Polymers ◽  
Pvt Data ◽  
Process Simulations ◽  
Pvt Measurements ◽  
Pvt Behavior ◽  
Couette Rheometer

The development of high performance products at lowest possible product development-time and costs is the demand of the plastics industry today. A successful use of process simulation to describe the behavior of complex structures and to minimize the technical and economic risks for companies requires application and process-relevant material data.The pvT-behavior of polymers is an essential parameter for process simulations. Especially the dependence of the specific volume of pressure and temperature [1, 2] under process conditions is not mapped to the existing measurement methods.In this study pvT measurements were performed on selected amorphous and semi-crystalline polymers (PP, HDPE, POM, PBT, and ABS) with a Pirouette pvT device, a combination of a dilatometer and Couette rheometer. The specific volume was determined as a function of temperature (25-300°C) and at pressures ranging between 200-1000 bar. On top of that, the influence of the cooling rate was also investigated by pvT measurements performed at cooling rates of 0.1°C/s, 1°C/s and 100°C/s.The coefficients for the 2nd domain Tait pvT-model, which is implemented in the software Autodesk Moldflow, were determined by fitting the experimental pvT data and comparing them with the measured curves. As a result, the semi-crystalline polymers show a shift of the transition temperature to lower temperatures and a reduction in the specific volume in the melt is observed. For validation, in a case study shrinkage results in real were compared with the simulation.

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