Depolymerization Behavior for cis-Polyisoprene Rubber in Supercritical Tetrahydrofuran

Seung-Bum Lee; In-Kwon Hong

Journal of Industrial and Engineering Chemistry, Vol.4, No.1, 26-30, March, 1998

Department of Chemical Engineering, Dankook University, Seoul 140-714, Korea

The cis-polyisoprene rubber was depolymerized in supercritical tetrahydrofuran. The process was then characterized by the degree of degradation and the depolymerized products were identified by instrumental analysis such as GPC, FT-IR, and GC-MSD. As a result, cis-polyisoprene rubber was degraded to low molecular weight polymers in 3 hours, which have narrow molecular weight distribution, and above 10 organic compounds were produced. The products were different at operating conditions. In addition, the degradation of cis-polyisoprene rubber had small dependency upon the operating pressure, and was inhibited with concentration.

[References]

Ohm RF, "The Vanderbilt Rubber Handbook," R.T. Vanderbilt Company, Inc. (1990)
Madorsky SL, Straus S, Thompson D, Williamson L, J. Res. NBS, 42, 499 (1949)
Sarfare PS, Bhatnagar HL, Biswas AB, J. Appl. Polym. Sci., 7, 2199 (1963)
Golub MA, Gargiulo RJ, Polym. Lett., 24(10), 41 (1972)
Koll P, Metzger J, Angew. Chem.-Int. Edit. Engl., 17, 754 (1978)
Dhawan JC, Bencsath AF, Legendre RC, Supercritical Fluid Engineering Science, Kiran, E., Eds., ACS, Washington, D.C. (1993)
Glynn PAR, Van der Hoff BME, J. Macromol. Sci.-Chem., A7(8), 1695 (1973)

[Referenced By]

[Related Articles]

[1] Ohm RF, "The Vanderbilt Rubber Handbook," R.T. Vanderbilt Company, Inc. (1990)

[2] Madorsky SL, Straus S, Thompson D, Williamson L, J. Res. NBS, 42, 499 (1949)

[3] Sarfare PS, Bhatnagar HL, Biswas AB, J. Appl. Polym. Sci., 7, 2199 (1963)

[4] Golub MA, Gargiulo RJ, Polym. Lett., 24(10), 41 (1972)

[5] Koll P, Metzger J, Angew. Chem.-Int. Edit. Engl., 17, 754 (1978)

[6] Dhawan JC, Bencsath AF, Legendre RC, Supercritical Fluid Engineering Science, Kiran, E., Eds., ACS, Washington, D.C. (1993)

[7] Glynn PAR, Van der Hoff BME, J. Macromol. Sci.-Chem., A7(8), 1695 (1973)