Propylene oligomers: extraction methods and characterization by FTIR, HPLC, and SEC

Mansouri, H. El; Yagoubi, Najet; Scholler, D.; Feigenbaum, A.; Ferrier, D.

doi:10.1002/(sici)1097-4628(19990118)71:3<371::aid-app2>3.3.co;2-d

Cited by 2 publications

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“…Indeed, oligomers are known to be preferentially localized in the external layers of the polymer. 30 In addition, they are relatively unstable and reactive molecules. Thus, oxidation might have occurred preferentially on these compounds and led to their degradation (scission).…”

Section: Hydrolytic Stabilitymentioning

confidence: 99%

Plasma‐based sterilization: Effect on surface and bulk properties and hydrolytic stability of reprocessed polyurethane electrophysiology catheters

Lerouge

Guignot

Tabrizian

et al. 2000

J. Biomed. Mater. Res.

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Plasma-based sterilization is a promising alternative to ethylene oxide (EO) for reprocessing of electrophysiology catheters. To assess its safety in terms of material damage, modifications of surface and bulk properties as well as hydrolytic stability of sterilized catheters were evaluated. Polyurethane (PU) single-use electrophysiology catheters were subjected to one, five, and ten sterilization cycles by Sterrad-100S and Plazlyte™, as well as by pure EO for comparison. Surface analysis techniques (ATR-FTIR, XPS, DCA) showed oxidation limited to the near-surface layer induced by both plasma-based sterilizers, whereas EO induced slight but deeper alkylation. Using bulk analysis techniques (RP-HPLC, SEC), oligomer alteration was observed after all three sterilization techniques, without modification of molecular weights. Hydrolytic stability of catheters was slightly changed by plasma-based sterilization, with a small increase in released oligomers. Finally, although Plazlyte and Sterrad are both plasma-based techniques, they induced different impacts on catheters, such as the degradation of an additive with Sterrad, and a clear difference in coloration with Plazlyte.

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Section: Hydrolytic Stabilitymentioning

confidence: 99%

Plasma‐based sterilization: Effect on surface and bulk properties and hydrolytic stability of reprocessed polyurethane electrophysiology catheters

Lerouge

Guignot

Tabrizian

et al. 2000

J. Biomed. Mater. Res.

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“…For isolation of resins we used a Soxhlet extractor, which is a general apparatus for the separation of solvent soluble components from solid materials and has also been used in polymer science. For example, it has been used for the separation of additives from polyolefins using methylene dichloride (El Mansouri et al 1998 ), separation of oligomers from polypropylene using n-heptane ( 1999 ), and removal of insoluble parts of cross-linked polyethylene using xylene (Elzubair et al 2003 ). We employed a commercial instrument that allows quick extraction at an elevated temperature by heating an extraction chamber of the instrument (Figure 2 ).…”

Section: Introductionmentioning

confidence: 99%

Biobased carbon content of resin extracted from polyethylene composite by carbon-14 concentration measurements using accelerator mass spectrometry

et al. 2014

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An estimation procedure for biobased carbon content of polyethylene composite was studied using carbon-14 (14C) concentration ratios as measured by accelerated mass spectrometry (AMS). Prior to the measurement, additives and fillers in composites should be removed because they often contain a large amount of biobased carbon and may shift the estimation. Samples of resin with purity suitable for measurement were isolated from composites with a Soxhlet extractor using heated cyclohexanone. After cooling of extraction solutions, the resin was recovered as a fine semi-crystalline precipitate, which was easily filtered. Recovery rates were almost identical (99%), even for low-density polyethylene and linear low-density polyethylene, which may have lower crystallinity. This procedure could provide a suitable approach for estimation of biobased carbon content by AMS on the basis of the standard ASTM D 6866. The biobased carbon content for resin extracted from polyethylene composites allow for the calculation of biosynthetic polymer content, which is an indicator of mass percentage of the biobased plastic resin in the composite.

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Propylene oligomers: extraction methods and characterization by FTIR, HPLC, and SEC

Cited by 2 publications

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Plasma‐based sterilization: Effect on surface and bulk properties and hydrolytic stability of reprocessed polyurethane electrophysiology catheters

Plasma‐based sterilization: Effect on surface and bulk properties and hydrolytic stability of reprocessed polyurethane electrophysiology catheters

Biobased carbon content of resin extracted from polyethylene composite by carbon-14 concentration measurements using accelerator mass spectrometry

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