Issue 32, 2023, Issue in Progress

Impact fracture mechanism and heat deflection temperature of PLA/PEICT blends reinforced by glass fiber

Abstract

To enhance the crack propagation and initiation properties and heat deflection temperature of poly(lactic acid) (PLA), PLA/poly(1,4-cyclohexanedimethylene isosorbide terephthalate) (PEICT) blend systems were prepared and glass fibers (GF) were incorporated as reinforcements. Due to high shear force during extrusion and injection molding the length of GF was reduced and was oriented towards the flow direction. Although the reinforcing effect of the GF deviated from the theoretical values calculated by the Halpin–Tsai equation, both tensile and flexural properties were greatly enhanced with increasing GF content. Dynamic mechanical and thermal testing showed improved storage modulus throughout the entire temperature range showing outstanding reinforcing ability. By incorporating GF into the PLA/PEICT blend, the crack propagation and initiation properties were enhanced compared to pristine PLA. Such an increase in crack propagation properties was the result of enhanced modulus with the added GF. Moreover, because of the increased modulus, the heat deflection temperatures of the GF reinforced blends were drastically increased showing a value of 91.4 °C at 20 wt% GF loading. The high performance reached by the biomass-based composites developed in this research shows great possibility of replacing these conventional petroleum-based polymer systems.

Graphical abstract: Impact fracture mechanism and heat deflection temperature of PLA/PEICT blends reinforced by glass fiber

Article information

Article type
Paper
Submitted
02 Jun 2023
Accepted
19 Jul 2023
First published
25 Jul 2023
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2023,13, 22315-22324

Impact fracture mechanism and heat deflection temperature of PLA/PEICT blends reinforced by glass fiber

J. H. Lee, C. K. Park and S. H. Kim, RSC Adv., 2023, 13, 22315 DOI: 10.1039/D3RA03692H

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