Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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The Effect of Gas Absorption Induced a Change of Glass Transition Temperature in Microcellular Foamed Plastics

초미세 발포 플라스틱의 유리전이온도를 변화시키는 가스 용해량의 영향

  • Published : 2001.05.01
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Abstract

The thermoforming process is widely used in the plastics industry to produce articles for the packaging, automotive, domestic construction and leisure industries. The microcellular foaming process appeared at M.I.T. in 1980s to save a quantity of polymer materials and increase their mechanical properties. The glass transition temperature of polymer materials is one of many important process variables in appling the microcellular foaming process to the conventional thermoforming process. The goal of this research is to evaluate the relation between gas absorption and glass transition temperature in batch process using microcellular foaming process. The weight gain ratio of polymer materials has a conception of gas absorption. Polymers such as acrylonitrile-butadiene-styrene(ABS), polystyrene(PS) have been used in this experiment. According to conventional Chows model and Cha-Yoon model, it was estimated with real experimental result to predict a change of glass transition temperature as a function of the weight gain ratio of polymer materials in batch process to gain microcellular foamed plastic products.

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References

  1. 1997, '플라스틱 사이언스,' 한국 플라스틱 기술 정보 센타, 통권151호, 제8호, pp. 104-130
  2. Lau, H. C., Bhattacharya, S. N. and field, G. L., 2000, 'Influence of Rheological Properties on the Sagging of Polypropylene and ABS Sheet for Thermoforming Applications,' Polymer Engineering & Science, SPE, Vol. 40, No. 7, pp. 1564-1570 https://doi.org/10.1002/pen.11286
  3. Strong, A. Brent, 1996, Plastics, Materials and Processing, Prentice Hall
  4. Sung Woon Cha, 1994, 'A Microcellular Foaming/Foaming Process Performed at Ambient Temperature and a Super Microcellular Foaming Process,' Ph. D Thesis in Mechanical Engineering, M.I.T., pp. 20-96
  5. Vipin Kumar, 1988, 'Process Synthesis for Manufacturing Microcellular Thermoplastic Parts: A Case Study in Axiomatic Design,' Ph. D Thesis in Mechanical Engineering, M.I.T., pp. 15-95
  6. Chow, T. S., 1980, 'Molecular Interpretation of the Glass Transition Temperature of Polymer Diluent Systems,' Macromolecules, Volume 13, pp. 360-365 https://doi.org/10.1021/ma60074a029
  7. 윤재동, 1998, '가스의 용해량에 따른 고분자의 유리전이온도 및 점도,' 연세대학교 대학원 기계공학과, pp. 22-65
  8. 차성운, 윤재동, 2000, '가스를 포함한 고분자 재료(PETG)의 유리전이온도 변화,' 대한기계학회논문집 A권, 제24권, 제4호, pp. 824-829
  9. Baldwin, D. F., 1994, 'Microcellular Polymer Processing and the Design of a Continuous Sheet Processing System,' Ph. D Thesis in Mechanical Engineering, M.I.T., pp. 25-86
  10. Sumarno, Sunada, T., Sato, Y., Takishima, S. and Masuoka, H., 2000, 'Polystrene Microcellular Plastic Generation by Quick-Heating Process at High Temperature,' Polymer Engineering & Science, SPE, Vol. 40, No. 7, pp. 1510-1521 https://doi.org/10.1002/pen.11280
  11. Brydson, J. A., 1989, Plastics Materials, Butterworths, pp. 398-435
  12. Chul Bum Park, 1993, 'The Role of Polymer/Gas Solutions in Continuous Processing of Microcellular Polymers,' Ph. D Thesis in Mechanical Engineering, M.I.T., pp. 73-74