A critical comparison of methods for hydroperoxide measurement in oxidized polyolefins

Carlsson, D. J.; Lacoste, J.

doi:10.1016/0141-3910(91)90009-g

Cited by 93 publications

(52 citation statements)

References 17 publications

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“…An aldehyde peak is consistent with oxidized chain ends failing to convert to carboxylic acids, 20 but has not been reported in clinical retrievals. There was a small effect of solute on aqueous aging (PBS vs. distilled water), which cannot be explained by the small differences in oxygen solubility due to ionic concentration.…”

mentioning

confidence: 93%

Can accelerated aqueous aging simulate in vivo oxidation of gamma‐sterilized UHMWPE?

Mazzucco¹,

Dumbleton²,

Kurtz³

2006

J Biomed Mater Res

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Oxidation of ultrahigh molecular weight polyethylene (UHMWPE) gamma-sterilized arthroplasty components occurs in vivo. Though accelerated in vitro protocols have been developed to test the relative oxidation resistance of various types of UHMWPE, it is desirable to develop an accelerated aging protocol that more closely approximates the in vivo environment. The goal of this study was to investigate the effects of temperature, solute, and oxygen partial pressure in aqueous media on the oxidation of gamma-sterilized UHMWPE, as the basis for the development of improved accelerated aging protocols. The accelerated oxidation behavior of gamma-sterilized GUR 1150 was studied at 60 and 70 degrees C in an open vessel filled with distilled water or PBS in equilibrium with a controlled partial pressure of oxygen. The extent of oxidation was assessed using standardized mechanical and chemical evaluation techniques (small punch and Fourier transform infrared spectroscopy). Accelerated oxidation of UHMWPE was achieved in aqueous environments; however, both clinically relevant and nonrelevant oxidation species (e.g., aldehydes) were observed for long aging times at 60 degrees C, and for all aging times at 70 degrees C. These findings point the way to the development of an accelerated aging protocol. The current data, considered in conjunction with real-time aging studies, suggest that a temperature between body temperature and 60 degrees C may accelerate oxidative degradation without altering the oxidative patterns encountered in vivo.

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mentioning

confidence: 93%

Can accelerated aqueous aging simulate in vivo oxidation of gamma‐sterilized UHMWPE?

Mazzucco¹,

Dumbleton²,

Kurtz³

2006

J Biomed Mater Res

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“…This reaction causes the formation of adjacent hydroperoxides. For many years, it was believed that only the intra-chain propagation takes place, but this assumption has been challenged [39]. Another decomposition reaction of hydroperoxides with lower activation energy is the decomposition catalyzed by transition metal ions [40,41] Termination reactions are bimolecular (stage 4).…”

Section: Influence Of Oxygenmentioning

confidence: 99%

Review on the thermo-oxidative degradation of polymers during processing and in service

Gijsman

2008

E-Polymers

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“…8,16 As these peroxides are the species which initiate the copolymerization, 17 we attempted first to determine what were the best conditions leading to the highest peroxide level on the membrane without damaging its surface. Among all the methods proposed to detect peroxides, 8,18 we chose the one described by Suzuki et al 15 using the conversion of DDPH free radicals by peroxides. Two kinds of plasma treatments in different conditions were used.…”

Section: Peroxide Determinationmentioning

confidence: 99%

New membranes bearing pyridinic ligands by plasma graft polymerization

Michel¹,

Marzin²,

Tarrago³

et al. 1998

J. Appl. Polym. Sci.

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2Ј-(2-Pyridyl)ethyl methacrylate (2-PEMA) synthesized in our laboratory was grafted onto the surface of polyacrylonitrile (PAN) ultrafiltration membranes by plasma-induced graft copolymerization. He plasma was used to activate the surface of PAN membranes before the grafting reaction. The amounts of peroxides created by plasma treatment were determined using 2,2-diphenyl-1-picrylhydrazine (DDPH). Influences of plasma treatment power, time, monomer concentration, presence of inhibitor, and solvents on polymerization were investigated. Surface functionalization was characterized by FTIR-ATR, ESCA, SEM, and water-contact angles. Grafting yield was shown to increase with the monomer concentration and if a mixture of H 2 O/CH 3 OH was used. Hence, it was possible to show that plasma treatment was a good technique to introduce ligands with coordinating properties by modifying the surface of the PAN membranes.

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A critical comparison of methods for hydroperoxide measurement in oxidized polyolefins

Abstract: A critical comparison of methods for hydroperoxide measurement in oxidized polyolefins

Cited by 93 publications

References 17 publications

Can accelerated aqueous aging simulate in vivo oxidation of gamma‐sterilized UHMWPE?

Can accelerated aqueous aging simulate in vivo oxidation of gamma‐sterilized UHMWPE?

Review on the thermo-oxidative degradation of polymers during processing and in service

New membranes bearing pyridinic ligands by plasma graft polymerization

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