ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Decomposition of peroxides of isotactic powdered polypropylene by hydroiodic acid

P. Citovický, I. Šimek, D. Mikulášová, and V. Chrástová

Department of Chemical Technology of Plastics and Fibres, Slovak Technical University, 880 37 Bratislava

Abstract:  By the method of experimental designing, its statistical evaluation and by using hydroiodic acid we looked for conditions of quantitative decomposition of peroxides of isotactic powdered polypropylene initiating styrene polymerization in the emulsion system in the presence of FeSO₄ —triethylenetetramine chelate. The degree of decomposition of peroxides of isotactic powdered polypropylene was determined by the results of styrene polymerization in their presence. The investigated peroxides decompose quantitatively by employing HI in the concentration range 5.5—7.58 mol l^-1 at 70—90°C during 6—7 h. These conditions exclude the possibility of simultaneous quantitative determination of peroxides for their thermal decomposition proceeding parallelly at the above-mentioned temperatures.

Full paper in Portable Document Format: 322a194.pdf

Chemical Papers 32 (2) 194–204 (1978)