Mechanical, morphological, thermal properties and hydrolytic degradation behavior of polylactic acid/polypropylene carbonate blends prepared by solvent casting

Mohamed Haneef, Intan Najwa Humaira and Buys, Yose Fachmi and Shaffiar, Norhashimah and Haris, Nurul Assadiqah and Abdul Hamid, Abdul Malek and Syed Shaharuddin, Sharifah Imihezri (2020) Mechanical, morphological, thermal properties and hydrolytic degradation behavior of polylactic acid/polypropylene carbonate blends prepared by solvent casting. Polymer Engineering and Science, 60 (11). pp. 2876-2886. ISSN 0032-3888 E-ISSN 1548-2634

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Abstract

The preparation of polylactic acid (PLA) and polypropylene carbonate (PPC) blend films by using the solvent casting method is to improve the properties of pure PLA. The blends' mechanical and thermal properties, morphological as well as hydrolytic degradation behavior are evaluated. The tensile test proved that the increase of PPC from 0 wt% to 75 wt% could improve the elongation of pure PLA when the graph showed a significant increase of the elongation from 10% to 1000%. Scanning Electron Microscopy (SEM) supported the significant increase in elongation of the blends when it shows a definite phase separation in 75/25 PLA/PPC, where 25% of PPC has formed islands in the PLA matrix. Differential scanning calorimetry indicates the partial miscibility of the blends where two peaks of the glass transition temperature moved towards each other when the amount of PPC increases. Fourier transform infrared (FTIR) spectroscopy revealed a possible intermolecular interaction between two polymers, which affects the miscibility of the blends. Finally, the hydrolytic degradation test indicates that the degradation started from the PLA phase and the blends' degradation rate decrease as wt% of PPC increase

Item Type:	Article (Journal)
Uncontrolled Keywords:	mechanical properties; thermal properties; FT-IR; degradation; blends; polyesters; polycarbonates; renewable resources; thin films
Subjects:	T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Suhani Saarani
Date Deposited:	26 Jan 2021 10:16
Last Modified:	26 Jan 2021 10:16
URI:	http://irep.iium.edu.my/id/eprint/88036

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