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[ subject:"Plastics Technology." ]
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Cosolvent effects in polymer-solvent...
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The Pennsylvania State University.
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Cosolvent effects in polymer-solvent systems.
紀錄類型:
書目-語言資料,印刷品 : Monograph/item
正題名/作者:
Cosolvent effects in polymer-solvent systems./
作者:
Jones, Adam Terrell.
面頁冊數:
205 p.
附註:
Source: Dissertation Abstracts International, Volume: 68-10, Section: B, page: 6810.
Contained By:
Dissertation Abstracts International68-10B.
標題:
Engineering, Chemical. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3284946
ISBN:
9780549272014
Cosolvent effects in polymer-solvent systems.
Jones, Adam Terrell.
Cosolvent effects in polymer-solvent systems.
- 205 p.
Source: Dissertation Abstracts International, Volume: 68-10, Section: B, page: 6810.
Thesis (Ph.D.)--The Pennsylvania State University, 2007.
A ternary experiment was designed to probe the effect of water on the solubility and diffusivity in a poly(ethylene)-ethylene system. The experiment is a simple gravimetric technique for measuring mass uptake of penetrants in polymers.
ISBN: 9780549272014Subjects--Topical Terms:
1018531
Engineering, Chemical.
Cosolvent effects in polymer-solvent systems.
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A ternary experiment was designed to probe the effect of water on the solubility and diffusivity in a poly(ethylene)-ethylene system. The experiment is a simple gravimetric technique for measuring mass uptake of penetrants in polymers.
520
$a
Devolatilization of polymers is important to industrial applications such as film drying, foam production, microelectronics manufacturing, and bulk plastics processing. The mass transport and thermodynamics within such systems often limits production throughput. For example, a common method of foam devolatilization is ambient pressure desorption. In this situation, the diffusion of residual species from the foam to the surrounding air is the limiting step in the manufacturing process. Therefore, the use of a cosolvent to affect the solubility and diffusion favorably is an area of interest to industry. However, little data exist and few models are capable of predicting the influences that occur when a cosolvent is added to a system.
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This thesis focuses on measuring and describing cosolvent effects in polymer-solvent systems. Inverse gas chromatography was used to test the influence of CO2 and ethylene at high pressures on the solubility and diffusion of several solvents in poly(vinyl acetate) and poly(styrene). Through testing at multiple conditions it was possible to determine which gas had the largest effect on the polymer-solvent behavior. In addition, influences due to solvent size were examined.
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Lastly, several thermodynamic models are applied to a phase equilibria problem of predicting anomalous solubility behavior in copolymer systems. In certain systems, solvents have been observed to have higher solubility in copolymers compared to the two respective homopolymers. The goal was to determine which, if any, models could predict such behavior without experimental data for parameterization.
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http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3284946
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