Preliminary study of 4-arms poly(caprolactone) star-shaped polymer: Synthesis and characterization

Ahmad Shariff, Siti Hajar and Ismail, Mohamad Wafiuddin (2021) Preliminary study of 4-arms poly(caprolactone) star-shaped polymer: Synthesis and characterization. Journal of Academia, Volume 9 (Number 1). pp. 127-138. ISSN 2289-6368 (Unpublished)

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Abstract

Star-shaped polymers have vast potential in bioapplication due to their architecture. In this study, the suitability of ring opening polymerization (ROP) technique to synthesis star-shaped poly(caprolactone) and the thermal properties of the synthesized star-shaped polymers were demonstrated. The 4 -arm star-shaped of poly(caprolactone) (4s PCL) with -OH terminal and average molecular weight (Mn) of 5000, 10000, and 15000 g/mol were synthesized via ROP of ԑ-caprolactone (ԑ-CL) using a symmetric pentaerythritol (PET) as the core. Different molecular weights were obtained by using different ratios of ԑ-CL and PET in the presence of catalyst, stannous octoate (Sn(Oct)2). The FTIR spectra showed the presence of bands of methylene group of polymer repeating chain which confirm ROP of the ԑ-caprolactone. The average molecular weight (Mn) determined from proton nuclear magnetic resonance (1H NMR) analysis showed that all 4s PCL have approximately the same molecular weight as the theoretical values. All polymers obtained had high yield with >85%. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) analysis showed that there were no significance different in the thermal properties of the synthesized polymers. A single step degradation for all 4s PCL was observed and the crystallization melting point of the polymers was within the range of melting point of PCL.

Item Type:	Article (Journal)
Additional Information:	89725/8895
Uncontrolled Keywords:	Star-shaped PCL, ROP, ԑ-caprolactone, bioapplication
Subjects:	Q Science > QD Chemistry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Chemistry
Depositing User:	Dr Mohamad Wafiuddin Ismail
Date Deposited:	07 May 2021 15:45
Last Modified:	07 May 2021 15:45
URI:	http://irep.iium.edu.my/id/eprint/89725

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