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Weichmacherverlust bei PVC-Objekten von Joseph Beuys – Versuche zu kurativen und konservatorischen Massnahmen
ANHANG III: ZUSAMMENSTELLUNG VON ABSTRACTS
Beschichtung (physikalische gebundene Schutzschicht)
Messori, M.; Toselli, M.; Pilati, F.; Fabbri, E.; Fabbri, P.; Pasquali, L.; Nannarone, S. (2004): Prevention of
plasticizer leaching from PVC medical devices by using organic–inorganic hybrid coatings. In:
Polymer, vol. 45, issue 3, February 2004, S. 805-813
, -triethoxysilane terminated poly(ethylene oxide) (PEO-Si) was prepared and used to produce organic/inorganic
hybrids by the sol-gel approach. These hybrids werde used as coatings for flexible PVC tubes in order to reduce the
plasticizer leaching from PVC medical devices. Extraction tests carried out with hexane indicated that all coating
composition investigated are able to strongly reduce (about one order of magnitude) the leaching of di-ethylhexyl
phthalate in hexane. The best results were obtained by an accurate balance of organic and inorganic phases
content. XPS analysis showed a preferential segregation of silica onto the outer surface suggesting that a high
inorganic content at the coating–extraction medium interface was present.
Jayakrishnan, A.; Sunny, M. C.; Rajan, Mini N. (1995): Photocrosslinking of azidated poly(vinyl chloride)
coated onto plasticized PVC surface: Route to containing plasticizer migration. In: Journal of Applied
Polymer Science, Volume 56, Issue 10, Date: 6 June 1995, S. 1187-1195
The migration of phthalate esters which are commonly employed for plasticizing poly(vinyl chloride) (PVC) is a
significant problem in PVC-based medical devices as well as in packaging used for food stuffs and pharmaceuticals.
Medical-grade PVC resin was treated with sodium azide in dimethylformamide (DMF) to prepare the azide polymer.
The polymeric azide was coated onto the surface of plasticized PVC sheets by dipping in a solution of the polymer in
tetrahydrofuran (THF). Crosslinking of the azide polymer was accomplished by irradiating the surface using a 125 W
UV lamp for various lengths of time. Migration of the plasticizer di 2-(ethylhexyl phthalate) (DEHP) from coated and
uncoated samples was examined in n-hexane at 30°C. It was found that 50-80% reduction in migration of DEHP
could be effected from plasticized PVC in comparison with the controls in 72 h by this technique depending on the
concentration of the coating solution, coating thickness, azide concentration, and irradiation dose.
Frey, H.E. (1959): Der Effekt von Schlussstrichen auf die Weichmacherwanderung bei PVC-
Kunstleder. In: Kunststoff-Praxis, Heft 2, S. 9-14
Aufpfropfen / Grafting (chemisch gebundene Schutzschicht)
Lakshmi, S.; Jayakrishnan, A. (1998): Migration Resistant, Blood-Compatible Plasticized Polyvinyl Chloride for Medical
and Related Applications. In: . Artificial Organs, Vol. 22, Issue 3, S. 222
(...) It has been shown that the migration resistance and blood compatibility of flexible PVC could be significantly
improved by grafting polyethylene glycol (PEG), the most blood-compatible polymer known today, onto the surface of
flexible PVC by the classical Williamson ether synthesis reaction. The technique is simple and versatile enough to
produce blood-compatible, migration resistant PVC surfaces for many medical applications. The method may also
find use for preventing plasticizer migration from PVC cling films and polyvinylidene chloride films used extensively in
food packaging.