Ishak, Khairul Anwar and Annuar, Mohamad Suffian Mohamad and Aris, Muhammad Haziq (2022) Chain scission by ultrasonication of polycaprolactone with different initial molecular weight and concentration. Journal of Polymer Research, 29 (4). ISSN 1022-9760, DOI https://doi.org/10.1007/s10965-022-02982-y.
Full text not available from this repository.Abstract
Ultrasonication-mediated scission of three commercially available polycaprolactone (PCL) with different initial molecular weights (designated as low-, intermediate- and high-IMW PCL) was investigated. Each IMW PCL solution at different concentrations were subjected to sonication intervals. Scission-induced molecular size reduction, polydispersity index alteration, and a limiting molecular weight of the sonicated PCL samples depend on their initial molecular weight and effective concentration, whereby interaction forces play an important role. epsilon-caprolactone was identified post-scission event. It is hypothesized that a single scission event occurs at the upward/downward vicinity to the mid-point of the chain involving unzipping mechanism, driven by known forces associated with sonication energy dissipation. Further scission event of the generated fragment is no longer feasible below a limiting molecular weight for the designated IMW PCL.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Education, Malaysia [Grant No: FP038-2020], Universiti Malaya [Grant No: UM.C/625/1/HIR/MOHE/05], Impact-Oriented Interdisciplinary Research Grant [Grant No: IIRG017A-2019] |
| Uncontrolled Keywords: | Polycaprolactone; Biodegradable polymer; Molecular weight; Polymer scission; Ultrasonication |
| Subjects: | Q Science > Q Science (General) |
| Divisions: | Faculty of Science |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 11 Aug 2022 02:18 |
| Last Modified: | 11 Aug 2022 02:18 |
| URI: | http://eprints.um.edu.my/id/eprint/32735 |
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