Thermal Characteristics of Surface-Crosslinked High Density Polyethylene Beads as a Thermal Energy Storage Material

Jae-Woo Kim; Young-Sun Kim; Ho-Suk Choi

Korean Journal of Chemical Engineering, Vol.19, No.4, 632-637, July, 2002

DOI10.1007/BF02699309 Export Citation

Thermal Characteristics of Surface-Crosslinked High Density Polyethylene Beads as a Thermal Energy Storage Material

Jae-Woo Kim, Young-Sun Kim, and Ho-Suk Choi^†

Department of Chemical Engineering, Chungnam National University, 220 Gung-dong, Yusong-gu, Daejeon 305-764, Korea

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High density polyethylene (HDPE) beads were surface-crosslinked in a modified plasma reactor by using argon plasma. The modified plasma reactor can treat a large amount of beads to be uniformly surface-crosslinked. The objectives of this study were to develop a shape-stabilized functional thermal energy storage material and to find an optimum plasma reaction condition out of various operations. To achieve these objectives, we systematically studied the effects of the gas pressure, the radio frequency (RF) power and the treatment time on the degree of crosslinking. The degree of crosslinking was measured by solvent extraction method (BXM: boiling xylene method). The chemical and physical characterization of the material was performed by using fourier transform infra-red (FT-IR) spectroscopy, differential scanning calorimetry (DSC), and thermal gravimetric analysis (TGA). Finally, we confirmed the thermal stability of surface-crosslinked HDPE through about 50 thermal cycling tests.

Keywords:Plasma;Crosslinking;HDPE;Thermal Energy Storage Materials

[References]

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Kusakabe T, Kuriyama T, Morooka S, Powder Technol., 58, 125 (1989)
Masuoka T, Hirasa O, Suda Y, Bull. Res. Inst. Polym. Text., 144, 73 (1984)
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Silverstein RM, Bassler GC, Morril TC, "Spectrometric Identification of Organic Compound," 5th Ed. John Wiley and Son, New York (1991)

[Related Articles]

[1] Anand M, Cohen RE, Baddour RF, Polymer, 22, 361 (1981)

[2] Boneh H, Abrahanm M, Narkis M, Polym. Eng. Sci., 24, 1227 (1984)

[3] Clark DT, Dilks A, Shuttleworth D, A. J. Polym. Chem. Edn., 17, 957 (1997)

[4] Das PS, Adhikari B, Maiti S, J. Polym. Sci. A: Polym. Chem., 32(1), 39 (1994)

[5] Hudis M, J. Appl. Polym. Sci., 16, 2397 (1972)

[6] Inagaki NS, Tasaka S, Abe H, J. Appl. Polym. Sci., 46, 595 (1992)

[7] Kim KS, Jeon BJ, Jung IH, Korean J. Chem. Eng., 17(1), 33 (2000)

[8] Kusakabe T, Kuriyama T, Morooka S, Powder Technol., 58, 125 (1989)

[9] Masuoka T, Hirasa O, Suda Y, Bull. Res. Inst. Polym. Text., 144, 73 (1984)

[10] Park SH, Kim SD, Polym. Bull., 33(2), 249 (1994)

[11] Park SH, Kim SD, Korean J. Chem. Eng., 16(6), 731 (1999)

[12] Salyer IO, Davision JE, J. Appl. Polym. Sci., 28, 2903 (1983)

[13] Silverstein RM, Bassler GC, Morril TC, "Spectrometric Identification of Organic Compound," 5th Ed. John Wiley and Son, New York (1991)