Effect of γ-dose rate on crystallinity and morphological changes of γ-sterilized biomedical polypropylene
Article
Alariqi, Sameh A.S., Annamalai, A. Pratheep, Rao, B.S.M. and Singh, R.P.. 2009. "Effect of γ-dose rate on crystallinity and morphological changes of γ-sterilized biomedical polypropylene." Polymer Degradation and Stability. 94 (2), pp. 272-277. https://doi.org/10.1016/j.polymdegradstab.2008.10.027
Article Title | Effect of γ-dose rate on crystallinity and morphological changes of γ-sterilized biomedical polypropylene |
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ERA Journal ID | 1691 |
Article Category | Article |
Authors | Alariqi, Sameh A.S., Annamalai, A. Pratheep, Rao, B.S.M. and Singh, R.P. |
Journal Title | Polymer Degradation and Stability |
Journal Citation | 94 (2), pp. 272-277 |
Number of Pages | 6 |
Year | 2009 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0141-3910 |
0144-2880 | |
1873-2321 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.polymdegradstab.2008.10.027 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0141391008003364 |
Abstract | The present work is aimed to study the changes in crystallinity and morphology of biomedical polyolefins after γ-sterilization. The isotactic polypropylene (iPP) films were sterilized by γ-radiation and the changes were characterized by differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD) and atomic force microscopy (AFM) techniques. The effect of dose rate on crystallinity changes also was focused. It was found that crystallinity and morphology significantly changed with γ-irradiation. There was an increase in crystallinity up to 10 kGy accompanied with decrease in viscosity and mechanical properties. The changes in crystallinity mainly depend on γ-irradiation dose and dose rate. The rise in crystallinity was attributed to chain scission and forming new perfect lamellae. However, the reduction was accompanied by occurrence of γ- and β-phases and crosslinking. Possible explanations for transitions in phases are also discussed based on our results. |
Keywords | polypropylene; Crystallinity; Morphology; Gamma radiation; Dose rate |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 340302. Macromolecular materials |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Taiz, Republic of Yemen |
National Chemical Laboratory, India | |
University of Pune, India |
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