폐플라스틱 필름의 액상 열분해 및 고형왁스의 제조

황택성; 김영수; 황의환; Taek-Sung Hwang; Young-Su Kim; Eui-Hwan Hwang

Journal of the Korean Industrial and Engineering Chemistry, Vol.14, No.6, 774-778, October, 2003

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폐플라스틱 필름의 액상 열분해 및 고형왁스의 제조

Preparation of Solid State Wax and Liquid-phase Thermal Degradation Properties of Waste Plastic Film

황택성 ^†, 김영수, 황의환 ¹

충남대학교 공과대학 화학공학과, 대전 305-764
¹천안공업대학 신소재응용화학과, 천안 330-717

Taek-Sung Hwang^†, Young-Su Kim, and Eui-Hwan Hwang¹

Department of Chemcial Engineering, College of Engineering, Chungnam National University, Daejeon 305-764, Korea
¹Department of Advanced Material & Chemical Technology, Cheonan National Technical College, Cheonan 330-717, Korea

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초록

본 연구에서는 최근 환경문제를 유발하고 있는 폐플라스틱 필름을 고형 왁스로 재활용하기 위해 반응온도 350 ~ 400 ℃, 반응시간 30 ~ 120 min 범위에서 열분해하였다. 폐플라스틱 필름을 반응기에 투입시 효과적인 용융을 위해 소량의 폴리에틸렌 왁스를 첨가하였으며, 왁스의 첨가에 따른 용융특성을 관찰하였다. 또한 반응기의 교반속도, 질소유량에 따른 열분해 특성을 관찰하였다. 고형왁스의 구조 및 분자량 분포 그리고 용융점도를 FT-IR, GPC, 및 점도계를 이용하여 분석하였다. 고형왁스의 평균 분자량은 반응기에 투입한 왁스의 양, 반응시간, 온도가 증가함에 따라 감소하였으며, 용융점도의 경우 분자량과 비슷한 경향을 보였다. 또한 반응온도와 시간이 일정할 때 교반속도가 증가할수록 고형왁스의 용융점도는 감소하였으며 390 ℃ 이상에서는 거의 0에 근접하였다. 또한 분산도(Dispersity)는 동일조건에서 2 ~ 5로 분포되어 있었다.

In this study, the thermal degradation process has been investigated at various reaction temperature (350 ~ 400 ℃) and time (30 ~ 120 min) in order to recycle waste plastic films as solid state was. Waste plastic films were easily melted by adding a small amount of wax. The effects of was addition, stirring speed and nitrogen flow rate on their thermal degradation properties were investigated. FT-IR, GPC and viscometer were used to analyze properties of the solid wax including the structure, molecular weight distribution and melt viscosity. The average molecular weight of solid wax was decreased with increasing the reaction time, temperature and amount of wax added. Also, the viscosity of solid wax decreased with increasing the strring speed at a constant reaction temperature and time, and tis viscosity reached close to zero above 390 ℃. The polydispersity of solid wax was 2 ~ 5 at the same reaction condition.

Keywords:wax;waste plastic film;thermal degradation

[References]

Lee JG, Prospectives of Industrial Chemistry, 3(2), The Korean Society of Industrial and Engineering Chemistry, Seoul (2000)
Son BS, Environment & Resources, 212, 26, Korea Resources Recovery & Reutilization Corporation, Seoul (2001)
McCaffrey WC, Kamal MR, Cooper DG, Polym. Degrad. Stabil., 47, 133 (1995)
McCaffrey WC, Kamal MR, Cooper DG, Polym. Degrad. Stabil., 62, 513 (1997)
Bockhorn H, Hornung A, J. Anal. Appl. Pyrolysis, 48, 93 (1999)
Schirmer J, Kim JS, Klemm E, J. Anal. Appl. Pyrolysis, 60, 205 (2001)
Bagri R, Williams PT, J. Anal. Appl. Pyrolysis, 63, 29 (2001)
Lee KH, Shin DH, Seo YH, J. Korean Solid Wastes Eng. Soc., 19, 11 (2002)
KRICT, A Study on the Preparation of Medium Molecular Polyethylene Wax, KISTEP Report (1983)
Choi KH, HWAHAK KONGHAK, 39(6), 667 (2001)

[Related Articles]

[1] Lee JG, Prospectives of Industrial Chemistry, 3(2), The Korean Society of Industrial and Engineering Chemistry, Seoul (2000)

[2] Son BS, Environment & Resources, 212, 26, Korea Resources Recovery & Reutilization Corporation, Seoul (2001)

[3] McCaffrey WC, Kamal MR, Cooper DG, Polym. Degrad. Stabil., 47, 133 (1995)

[4] McCaffrey WC, Kamal MR, Cooper DG, Polym. Degrad. Stabil., 62, 513 (1997)

[5] Bockhorn H, Hornung A, J. Anal. Appl. Pyrolysis, 48, 93 (1999)

[6] Schirmer J, Kim JS, Klemm E, J. Anal. Appl. Pyrolysis, 60, 205 (2001)

[7] Bagri R, Williams PT, J. Anal. Appl. Pyrolysis, 63, 29 (2001)

[8] Lee KH, Shin DH, Seo YH, J. Korean Solid Wastes Eng. Soc., 19, 11 (2002)

[9] KRICT, A Study on the Preparation of Medium Molecular Polyethylene Wax, KISTEP Report (1983)

[10] Choi KH, HWAHAK KONGHAK, 39(6), 667 (2001)