Radiation effects in polypropylene/polystyrene blends as the model of aromatic protection effects

• Autorzy: Głuszewski W. , Zagórski Z. P.
• Konferencja: Proceedings of the 14th National Scientific Meeting of the Polish Radiation Society 24-26 Septemebr 2007, Kielce, Poland
• Języki publikacji: EN

Abstrakty

EN

A technically useful composition containing polypropylene (PP) as a principal constituent, expected to be working or to be processed in ionizing radiation field, e.g. for sterilization, has to be protected from undesired radiolysis resulting in radiation damage. Usually, conventional additives are used which are generally effective, especially when containing aromatic groups. They can be sometimes unacceptable, e.g. in medical applications. Polystyrene (PS) has been investigated as a protective component, in analogy to the classical case of cyclohexane/benzene system. Mechanical mixing of both polymers showed to be of modest effect, but two other procedures, of soaking polypropylene powder with polystyrene dissolved in styrene, or soaking with styrene and gamma preirradiation with resulting grafting (G = 12000 effects/100 eV), resulted in the composition of improved resistance towards radiation. The energy transfer, which explains the effect, is extended at a distance of 8-12 mers of polypropylene. The investigations have been made by gas chromatography and diffuse light reflection spectrophotometry (DRS), after 10 MeV electron beam irradiations.

Słowa kluczowe

EN

energy transfer; polypropylene; polystyrene; protection effect; radiation grafting

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2008
• Tom: Vol. 53, suppl. 1
• Strony: 21--24
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Głuszewski W.

autor

Zagórski Z. P.

• Department of Radiation Chemistry and Technology, Institute of Nuclear Chemistry and Technology, 16 Dorodna Str., 03-195 Warsaw, Poland, Tel.: [phone], Fax: [phone]

Bibliografia

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• 2. Albano C, Reyes J, Ichazo MN, Gonzales J, Rodriguez M (2003) Effects of the high doses of irradiation on the mechanical properties of PS/PP blends. Nucl Instrum Meth B 208:485–488
• 3. Dyne PJ, Denhartog (1964) Radiolysis of solid cyclohexanebenzene mixtures at –196°C. Nature 202:1105–1106
• 4. Freeman GR (1960) Radiolysis of cyclohexane. I. Pure liquid cyclohexane and cyclohexane-benzene solution. J Chem Phys 33:71–78
• 5. Kroh J, Karolczak S (1964) Radiolysis of cyclohexane + benzene mixtures at liquid nitrogen temperature by cobalt-60 γ rays. Nature 201:66–67
• 6. Zagórski ZP (1983) Dependence of depth-dose curves on the energy spectrum of 5–13 MeV electron beams. Radiat Phys Chem 22:409–418
• 7. Zagórski ZP (2003) Diffuse reflection spectrophotometry (DRS) for recognition of products of radiolysis in polymers. J Polym Mat 52:323–333
• 8. Zagórski ZP (2004) Role of spurs in radiation chemistry of polymers. In: Advances in radiation chemistry of polymers. Proc of IAEA Technical Meeting, 13–17 September 2003, University of Notre Dame, USA. IAEATECDOC- 1420. IAEA, Vienna, pp 21–31
• 9. Zagórski ZP, Głuszewski W (2007) Oxidation effects in postradiation processes of degradation polypropylene. In: Steller R, Żuchowska D (eds) Modyfikacja polimerów. Oficyna Wydawnicza Politechniki Wrocławskiej, Wrocław, pp 219–222 (in Polish)
• 10.Zagórski ZP, Rafalski A (1996) Diffuse reflectance spectrophotometry in polypropylene radiolysis study. Radiat Phys Chem 48:595–600