Flame retardant properties of polyurethane produced by the addition of phosphorous containing polyurethane oligomers (II)

Yeong-jin Chung; Younhee Kim; Sangbum Kim

Journal of Industrial and Engineering Chemistry, Vol.15, No.6, 888-893, November, 2009

DOI10.1016/j.jiec.2009.09.018 Export Citation

Flame retardant properties of polyurethane produced by the addition of phosphorous containing polyurethane oligomers (II)

Yeong-jin Chung , Younhee Kim¹, and Sangbum Kim^{1, †}

Department of Fire & Disaster Prevention, Kangwon National University, Gangwon 245-711, Republic of Korea
¹Department of Chemical Engineering, Kyonggi University, Suwon 442-760, Republic of Korea

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Chemical degradation of used PU was intentionally made by the addition of flame retardants such as tris(2-chloropropyl)phosphate (TCPP), triethyl phosphate (TEP) and trimethyl phosphonate (TMP). Final product obtained after the degradation reaction was named as DEP. The structure of degraded products (DEP) was analyzed by FT-IR and 31P NMR and it turned out to be phosphorous containing oligourethanes. Rigid polyurethane foam was produced using the degraded products (DEP) as flame retardants. The flammability and thermal stability of recycled rigid polyurethane was investigated. The mechanical properties such as compressive strength and tensile strength of recycled polyurethane were also studied. The recycled polyurethane shows reduced flammability and higher thermal stability over virgin polyurethane. Mechanical strength of recycled polyurethane also shows as high as that of virgin polyurethane. In order to evaluate flame retardant properties of the recycled polyurethane foams with various amounts of DEP, heat release rate (HRR) of the foam was measured by cone calorimeter. Scanning electron micrograph of recycled PU shows uniform cell morphology as virgin-PU.

Keywords:Recycling of PU;Thermal degradation;Flame retardant

[References]

Weigand E, Rabhofer W, Recycling of Polyurethanes, Technomic Publishing Company, Inc., USA, 1995, p. 3.
Park CR, Kim YC, Park NC, J. Korean Ind. Eng. Chem., 11(1), 105 (2000)
Troev K, Grandcharov G, Tesevi R, Polym. Degrad. Stab., 70, 43 (2000)
Troev K, Tsekova A, Tsevi R, J. Appl. Polym. Sci., 78(14), 2565 (2000)
Troev K, Grancharov G, Tsevi R, Tsekova A, Polymer, 41(19), 7017 (2000)
Laachachi A, Cochez M, Ferriol M, Leroy E, Lopez JM, Oget N, Polym. Degrad. Stab., 85, 641 (2004)
Lee SI, Kim DB, Sin JH, Lee YS, Nah C, J. Ind. Eng. Chem., 13(5), 786 (2007)
Zhang J, Wang X, Zhang F, Horrocks AR, Polym. Test., 23, 225 (2004)
Reghunadhan Nair CP, Clouet G, Brossas J (Eds.), J. Polym. Sci. Polym. Chem. Ed., 26, 1791 (1988)
Reghunadhan Nair CP, Clouet G, Eur. Polym. J., 25, 251 (1989)
Reghunadhan Nair CP, Clouet G, Polymer, 29, 1909 (1988)
Reghunadhan Nair CP, Clouet G, Guilbert Y, Polym. Degrad. Stab., 26, 305 (1989)
Chigwada G, Jash P, Jiang DD, Wilkie CA, Polym. Degrad. Stab., 89, 55 (2005)
Lv P, Wang Z, Hu K, Fan W, Polym. Degrad. Stab., 90, 523 (2005)
Nguyen C, Kim JH, Polym. Degrad. Stab., 93, 1037 (2008)
Yang CP, Wang SS, J. Polym. Sci. Polym. Chem., 27, 3551 (1989)
Babrauskas V, Grayson SJ, Heat Release in Fires, Elsevier Applied Science, London/New York, 1992, p. 31.
Redfern JP, J. Therm. Anal., 35, 1861 (1989)
ASTM E1354, Philadelphia, 1990.
ISO 5660-1, Genever, 2002.
Petrella RV, J. Fire Sci., 12, 14 (1994)

[Referenced By]

[Related Articles]

[1] Weigand E, Rabhofer W, Recycling of Polyurethanes, Technomic Publishing Company, Inc., USA, 1995, p. 3.

[2] Park CR, Kim YC, Park NC, J. Korean Ind. Eng. Chem., 11(1), 105 (2000)

[3] Troev K, Grandcharov G, Tesevi R, Polym. Degrad. Stab., 70, 43 (2000)

[4] Troev K, Tsekova A, Tsevi R, J. Appl. Polym. Sci., 78(14), 2565 (2000)

[5] Troev K, Grancharov G, Tsevi R, Tsekova A, Polymer, 41(19), 7017 (2000)

[6] Laachachi A, Cochez M, Ferriol M, Leroy E, Lopez JM, Oget N, Polym. Degrad. Stab., 85, 641 (2004)

[7] Lee SI, Kim DB, Sin JH, Lee YS, Nah C, J. Ind. Eng. Chem., 13(5), 786 (2007)

[8] Zhang J, Wang X, Zhang F, Horrocks AR, Polym. Test., 23, 225 (2004)

[9] Reghunadhan Nair CP, Clouet G, Brossas J (Eds.), J. Polym. Sci. Polym. Chem. Ed., 26, 1791 (1988)

[10] Reghunadhan Nair CP, Clouet G, Eur. Polym. J., 25, 251 (1989)

[11] Reghunadhan Nair CP, Clouet G, Polymer, 29, 1909 (1988)

[12] Reghunadhan Nair CP, Clouet G, Guilbert Y, Polym. Degrad. Stab., 26, 305 (1989)

[13] Chigwada G, Jash P, Jiang DD, Wilkie CA, Polym. Degrad. Stab., 89, 55 (2005)

[14] Lv P, Wang Z, Hu K, Fan W, Polym. Degrad. Stab., 90, 523 (2005)

[15] Nguyen C, Kim JH, Polym. Degrad. Stab., 93, 1037 (2008)

[16] Yang CP, Wang SS, J. Polym. Sci. Polym. Chem., 27, 3551 (1989)

[17] Babrauskas V, Grayson SJ, Heat Release in Fires, Elsevier Applied Science, London/New York, 1992, p. 31.

[18] Redfern JP, J. Therm. Anal., 35, 1861 (1989)

[19] ASTM E1354, Philadelphia, 1990.

[20] ISO 5660-1, Genever, 2002.

[21] Petrella RV, J. Fire Sci., 12, 14 (1994)