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Change of Glass Transition Temperature of PETG Containing Gas
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 Title & Authors
Change of Glass Transition Temperature of PETG Containing Gas
Cha, Seong-Un; Yun, Jae-Dong;
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 Abstract
The industries use polymer materials for many purposes because they have many merits. But these materials' costs take up too much proportion in overall cost of products that use these materials as their major material. So it is very economical for polymer industries to reduce these costs. Microcellular foaming process appeared in 1980's to solve this problem and it proved to be quite successful. This process uses inert gases such as CO2, N2. As these gases are dissolved into polymer matrices. many properties are changed. Glass transition temperature is one of these properties. DSC, DMA are devices that measures this temperature, but these are not sufficient to measure the temperature of polymer containing gas. In this paper, we devised a new tester that uses magnetism. We used this device to acquire data of the change of glass transition temperature and made Cha-Yoon model that can predict the change of glass transition temperature. Using this model, the change of this temperature can be estimated as a function of weight gain of gas. Cha-Yoon model proved that Chow's model is inappropriate to predict the change of glass transition temperature of polymer matrices containing gas.
 Keywords
Microcellular Foam;Glass Transition Temperature;Gas Absorption;
 Language
Korean
 Cited by
1.
후경화 조건에 따른 에폭시 수지의 물성에 관한 연구,한정영;김명훈;강성수;

한국생산제조학회지, 2012. vol.21. 6, pp.976-981 crossref(new window)
 References
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Baldwin, D.F., 1994, 'Microcelluar Polymer Processing and the Design of a Continuous Sheet Processing System,' Ph. D Thesis in Mechanical Engineering, Massachusetts Institute of Technology

2.
Cha, S.W., 1994, 'A Microcellular Foaming/Forming Process Performed at Ambient Temperature and a Supermicrocellular Foaming Process,' Ph. D Thesis in Mechanical Engineering, Massachusetts Institute of Technology

3.
Chow, T.S., 1980, 'Molecular Interpretation of the Glass Transition Temperature of Polymer-Diluent Systems,' Macromolecules, Volume 13, p. 362 crossref(new window)

4.
Kumar Vipin, 1988, 'Process Synthesis for Manufacturing Microcellular Thermoplastic Parts: A Case Study in Axiomatic Design,' Ph. D Thesis in Mechanical Engineering, Massachusetts Institute of Technology

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Strong, A. Brent, 1996, Plastics, Materials and Processing, Prentice Hall

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Ugural, A.C., 1991, Mechanics of Materials, McGraw-Hill