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Badania wpływu karboksylanów metali przejściowych na przebieg procesu oksydegradacji folii polietylenowej PE-LD

Gibas E., Rymarz G., Cichy B., Kużdżał E., Turkowska M.

Przemysł Chemiczny

2012

T. 91, nr 8

1536-1540

Zbadano wpływ stearynianów Fe(III) i Mn(II) oraz ich mieszaniny na szybkość oksydegradacji folii polietylenowych (PE-LD). W wyniku starzenia atmosferycznego i przyspieszonego zaobserwowano zmniejszenie masy cząsteczkowej, obniżenie parametrów wytrzymałościowych, wzrost indeksu karbonylowego oraz podatność utlenionych folii na atak mikrobiologiczny.

Fe(III) and Mn(II) stearates were added to low-d. polyethylene films to increase their degradability under atm. conditions and UV irradn. The addn. resulted in a decrease in mol. mass, tensile strength and elongation at break of the polymer and in an increase of the carbonyl index and microbial degrdn. rate.

Polyolefin oxo-degradation accelerators – a new trend to promote environmental protection

Cichy B., Kwiecień J., Piątkowska M., Kużdżał E., Gibas E., Rymarz G.

Polish Journal of Chemical Technology

2010

Vol. 12, nr 4

44-52

The paper presents the results of the tests on the preparation of iron (III) stearate – the most prominent oxo-biodegradation agent for polyolefinic plastics. The process chosen for testing was the double precipitation process, using stearic acid alkalised with soda lye and iron (III) chloride or iron (III) sulphate. A number of iron (III) stearate preparation methods described in the literature were tested and an analytical procedure for monitoring the process was developed using both the classical and instrumental techniques. FTIR spectroscopy is the most useful technique for the product quality control and identification. During the study the characteristics of the proper product were also determined using the DSC methods. Microscopy and laser diffraction particle size analysis were applied to determine the size of the precipitated product grains. An application sample of the product obtained by the double decomposition method from iron (III) sulphate as the iron carrier has successfully passed the application tests in the polyethylene packaging film.