Effect of γ-dose rate on crystallinity and morphological changes of γ-sterilized biomedical polypropylene

Alariqi, Sameh A. S.; Kumar, Anil; Rao, B. Sanjeeva; Singh, R. P.

doi:10.1016/j.polymdegradstab.2008.10.027

Cited by 32 publications

(13 citation statements)

References 22 publications

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“…2, and it shows an overall increase with the increasing of the irradiation dose and these values are found to be in agreement with the reported literature [31]. Various authors reported an increase in the degree of crystallinity at lower fluences whereas decrease at higher fluences [24,32]. The increase in the degree of crystallinity with an increase of gamma dose gives rise to increase in the electrical conductivity, which is consistent with the band gap measurements.…”

Section: X-ray Diffractionsupporting

confidence: 91%

Effect of gamma irradiation on the properties of plastic bottle sheet

Kumar

Ali

Sonkawade³

et al. 2012

Nuclear Instruments and Methods in Physics Research Section B:

135

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Section: X-ray Diffractionsupporting

confidence: 91%

Effect of gamma irradiation on the properties of plastic bottle sheet

Kumar

Ali

Sonkawade³

et al. 2012

Nuclear Instruments and Methods in Physics Research Section B:

135

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“…Better understanding of the effect of oxidative stress requires identification of the structural, physical, and chemical alterations in the meshes upon exposure to oxidative insult. Previous experiments with gamma irradiation of polymers revealed that three important molecular effects may occur in polyolefins in the presence of free radicals: (1) chain branching, followed by cross‐link formation; (2) chain scissions, which can also be followed by chain cross‐linking; and (3) chemical oxidation, also resulting in cross‐linking due to the formation of hydrogen bonds between the polymer chains (Figure ) . Our results suggest that all meshes exposed to the oxidative media underwent these transformations.…”

Section: Discussionsupporting

confidence: 50%

“…Previous experiments with gamma irradiation of polymers revealed that three important molecular effects may occur in polyolefins in the presence of free radicals: (1) chain branching, followed by cross-link formation; (2) chain scissions, which can also be followed by chain cross-linking; and (3) chemical oxidation, also resulting in cross-linking due to the formation of hydrogen bonds between the polymer chains ( Figure 7). 39,40 Our results suggest that all meshes exposed to the oxidative media underwent these transformations. However, the extent of the alterations was different when comparing UltraPro and Composix meshes.…”

Section: Discussionmentioning

confidence: 61%

In vitro study on the deterioration of polypropylene hernia repair meshes

et al. 2017

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Despite the relative safety of the procedure, hernia repairs are often associated with chronic post-operative pain. Although this complication has been linked among others to mesh deterioration, details of the processes that lead this deterioration are still unknown. This work aims to bridge this gap by analyzing the chemical, physical and structural alterations in hernia repair meshes exposed to oxidative stress in vitro. Here, we developed a methodology to characterize effect of oxidation stress on structure and properties of polymeric hernia repair meshes. It was shown that structural changes in polypropylene meshes exposed to oxidative stress may involve formation of cross-links between the polymer chains, chain scissions, and hydrogen bonds between the carboxyl groups, which are formed in the material during the oxidation. These effects result in mesh stiffening, ultimately leading to chronic post-operative pain. Moreover, we demonstrated that Composix meshes are more vulnerable to the oxidative stress when compared with UltraPro meshes. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 2225-2234, 2018.

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“…3 . No peaks are missing and no peak shifts were observed, confirming that the iPP retains its crystal structure even after gamma-ray or e-beam irradiation [ 29 , 30 ]. Although some studies showed [ 31 , 32 ] that gamma-ray irradiation forms hydroxyl (OH) and carbonyl (C=O) groups on polymers such as iPP, we did not observe any peaks corresponding to these groups at any dose [ 33 ].…”

Section: Resultsmentioning

confidence: 97%

Sterilization of polypropylene membranes of facepiece respirators by ionizing radiation

Pirker

Krajnc

Malec

et al. 2021

Journal of Membrane Science

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: Ionizing radiation has been identified as an option for sterilization of disposable filtering facepiece respirators in situations where the production of the respirators cannot keep up with demand. Gamma radiation and high energy electrons penetrate deeply into the material and can be used to sterilize large batches of masks within a short time period. In relation to reports that sterilization by ionizing radiation reduces filtration efficiency of polypropylene membrane filters on account of static charge loss, we have demonstrated that both gamma and electron beam irradiation can be used for sterilization, provided that the respirators are recharged afterwards.

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Effect of γ-dose rate on crystallinity and morphological changes of γ-sterilized biomedical polypropylene

Cited by 32 publications

References 22 publications

Effect of gamma irradiation on the properties of plastic bottle sheet

Effect of gamma irradiation on the properties of plastic bottle sheet

In vitro study on the deterioration of polypropylene hernia repair meshes

Sterilization of polypropylene membranes of facepiece respirators by ionizing radiation

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