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Thermal stability and chemical durability of PVC‐based biomedical devices
Author(s) -
Manfredini Matteo,
Bodecchi Lidia M.,
Marchetti Andrea
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.24942
Subject(s) - durability , hydrochloric acid , materials science , thermal stability , vinyl chloride , sterilization (economics) , chemical engineering , atomic absorption spectroscopy , chloride , chemical stability , nuclear chemistry , chemistry , composite material , polymer , organic chemistry , metallurgy , physics , copolymer , quantum mechanics , economics , foreign exchange , monetary economics , foreign exchange market , engineering
Poly(vinyl chloride) (PVC)‐based blood circuits for extracorporeal hemodialysis were investigated for the assessment of their thermal stability as well as their chemical durability towards ionizing radiation sterilization and environmental conditions of storage and transportation. Thermal degradation was monitored by measuring the amount of hydrochloric acid (HCl) evolved as a function of different thermal stresses. HCl was extracted from the internal lumen of the blood circuits, and then quantitatively evaluated under the corresponding form of chloride ions by chromatographic technique (HPLC‐IC). Behavior of PVC heat stabilizers was evaluated as well, determining also the concentration of calcium and zinc released by the investigated materials, by flame atomic absorption spectroscopy (FAAS) technique. Electron beam irradiation revealed an impact on blood tubing higher than that of environmental storage conditions. Nevertheless, real operative cases of sterilization and storage conditions turned out to be quite safe, and all blood circuits displayed good performances in terms of thermal stability. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102:5378–5387, 2006