Use of maleic anhydride compatibilization to improve toughness and other properties of polylactide blended with thermoplastic elastomers

Date

2014-12-01

Author

Kaynak, Cevdet

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

189
views

0
downloads

Polylactide (PLA) being a very brittle biopolymer could be toughened by blending with thermoplastic elastomers such as thermoplastic polyurethane elastomer (TPU) and thermoplastic polyester elastomer (TPE); unfortunately, these blends are immiscible forming round domains in the PLA matrix. Therefore, the purpose of this study was to investigate the effects of using maleic anhydride (MA) compatibilization on the toughness and other properties of PLA blended with TPU and TPE. MA grafting on the PLA backbone (PLA-g-MA) was prepared separately by reactive extrusion and added during melt blending of PLA/thermoplastic elastomers. IR spectroscopy revealed that MA graft might interact with the functional groups present in the hard segments of TPU and TPE domains via primary chemical reactions, so that higher level of compatibilization could be obtained. SEM studies indicated that PLA-g-MA compatibilization also decreased the size of elastomeric domains leading to higher level of surface area for more interfacial interactions. Toughness tests revealed that Charpy impact toughness and fracture toughness (K-IC and G(IC) of inherently brittle PLA increased enormously when the blends were compatibilized with PLA-g-MA. For instance, G(IC) fracture toughness of PLA increased as much as 166%. It was also observed that PLA-g-MA compatibilization resulted in no detrimental effects on the other mechanical and thermal properties of PLA blends. Copyright (c) 2014 John Wiley & Sons, Ltd.

Subject Keywords

Polylactide, Maleic anhydride, Compatibilization, Thermoplastic polyurethane elastomer, Thermoplastic polyester elastomer

URI

https://hdl.handle.net/11511/35270

Journal

POLYMERS FOR ADVANCED TECHNOLOGIES

DOI

https://doi.org/10.1002/pat.3415

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Effects of glass fiber reinforcement and thermoplastic elastomer blending on the mechanical performance of polylactide Varsavas, S. Deniz; Kaynak, Cevdet (2018-06-01) The purpose of this study was to investigate how optimum mechanical properties (strength-modulus-toughness) of inherently very brittle polylactide (PLA) could be obtained by reinforcing with E-glass fibers (GF) and blending with thermoplastic polyurethane elastomer (TPU). Composites and blends were compounded by twin-screw extruder melt mixing, while specimens were shaped by injection molding. SEM analyses revealed that 15 wt% GF and 10 wt% TPU domains, alone and together, could be uniformly distributed in ...
Effect of expandable graphite on flame retardant, thermal and mechanical properties of thermoplastic polyurethane composites filled with huntite&hydromagnesite mineral Guler, Turkan; Tayfun, Umit; Bayramlı, Erdal; DOĞAN, Mehmet (2017-01-10) The effect of expandable graphite (EG) was studied on the flame retardant, thermal and mechanical properties of thermoplastic polyurethane (TPU) containing huntite&hydromagnesite (HH). According to the flammability tests results, the synergistic interaction was observed between HH and EG. The maximum limiting oxygen index (LOI value was observed at a ratio of 1:1 (HH:EG) and the highest vertical burning test (UL-94) rating of V0 was observed at a ratios of 4:1, 3:2 and 1:1. The synergistic interaction betwe...
Mechanical properties of HTPB-IPDI-based elastomers Haska, SB; Bayramli, E; Pekel, F; Özkar, Saim (1997-06-20) A polyurethane elastomer having mechanical and adhesive properties suitable for liner applications in solid rocket propellants was developed using HTPB as the prepolymer and IPDI as the curing agent. The effects of the NCO/OH ratio (R value) and the triol/diol ratio on the mechanical properties of the polyurethane matrix were investigated. The reaction of HTPB and IPDI is followed by monitoring the changes in the IR absorption bands of the NCO stretching at 2255 cm(-1) and the CO stretching at 1730 cm(-1). ...
Effect of Maleic Anhydride Pretreatment on Tensile Bond Strength of a Silicone Soft Liner to a Denture Base Polymer DEMİR, HAKAN; SOYGUN, KORAY; DOĞAN, ARİFE; Keskin, Selda; DOĞAN, ORHAN MURAT; Bolayir, Giray (2011-10-01) Purpose: To determine the effect of resin surface treatment with dissolved maleic anhydride in butanone added into primer on the tensile bond strength between an acrylic denture base resin and a silicone soft liner.
Preparation and characterization of combustion modified polyurethane Baysal, Pelin; Hacaloğlu, Jale; Department of Polymer Science and Technology (2019) Polyurethane (PU) flexible foam is a cushioning material which is very versatile and high quality. Among them, high resilience (HR) foam provides better support factor which means it is highly comfortable. Polyurethane foam is combustible due to its chemical nature. Ignition of upholstered furniture caused increasing in residential fires and also people died. In this work modified high resilience polyurethanes with Polyisocyanate Polyaddition (PIPA) Polyol will be prepared to improve combustion characterist...

Citation Formats

C. Kaynak, “Use of maleic anhydride compatibilization to improve toughness and other properties of polylactide blended with thermoplastic elastomers,” POLYMERS FOR ADVANCED TECHNOLOGIES, pp. 1622–1632, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35270.