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 |
|---|---|
| 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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