Study on miscibility and degradation behavior of polylactic acid / thermoplastic polyurethane blends

Polylactic acid (PLA) has attracted tremendous interest to be used as an alternative to replace the petroleum-based polymers as it possesses good biodegradability, can be derived from renewable sources and shows high mechanical strength. However, its inherent brittleness and low toughness has limite...

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Main Authors:	Buys, Yose Fachmi, Anuar, Hazleen
Format:	Monograph
Language:	English
Published:	2018
Subjects:	TP1080 Polymers, plastics and their manufacture
Online Access:	http://irep.iium.edu.my/69104/ http://irep.iium.edu.my/69104/1/RESEARCH%20REPORT%20-%20YFB%20-%2020181231.pdf

id	iium-69104
recordtype	eprints
spelling	iium-691042019-02-03T10:01:26Z http://irep.iium.edu.my/69104/ Study on miscibility and degradation behavior of polylactic acid / thermoplastic polyurethane blends Buys, Yose Fachmi Anuar, Hazleen TP1080 Polymers, plastics and their manufacture Polylactic acid (PLA) has attracted tremendous interest to be used as an alternative to replace the petroleum-based polymers as it possesses good biodegradability, can be derived from renewable sources and shows high mechanical strength. However, its inherent brittleness and low toughness has limited its usage in broader applications. In this work, PLA was melt blended with tough thermoplastic polyurethanes (TPU) in order to produce ecofriendly polymeric materials with balanced mechanical properties. Moreover, the miscibility and the hydrolytic degradation behavior of PLA/TPU blends were also investigated as it is important to control materials degradation behavior in some applications. Five compositions of specimens were prepared by melt blending PLA with TPU using an internal mixer, followed by compression molding. Tensile and impact tests were performed to evaluate the mechanical properties. From the tests, it was apparent that the elongation-at-break and impact strength of the blends increased, as the TPU content increased. Dynamic Mechanical Analysis (DMA) and Scanning Electron Microscopy (SEM) observation were conducted to evaluate the miscibility of PLA/TPU blends. DMA results of the blends revealed two tangent delta peaks, indicated that the blends were immiscible, and the sea-island structure appeared at PLA/TPU 75/25 vol% SEM photograph supported this trend. Finally, hydrolytic degradation behavior of PLA, TPU, and PLA/TPU blends was investigated by measuring the weight loss after immersion the specimens in alkaline solution at predetermined time. It was found that the degradation behavior is affected by blend composition, where PLA/TPU 50/50 vol% showed the fastest degradation rate. This unique result might be ascribed to the cocontinuous morphology shown in the PLA/TPU blend 50/50 vol%. 2018-12-31 Monograph NonPeerReviewed application/pdf en http://irep.iium.edu.my/69104/1/RESEARCH%20REPORT%20-%20YFB%20-%2020181231.pdf Buys, Yose Fachmi and Anuar, Hazleen (2018) Study on miscibility and degradation behavior of polylactic acid / thermoplastic polyurethane blends. Project Report. UNSPECIFIED. (Unpublished)
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TP1080 Polymers, plastics and their manufacture
spellingShingle	TP1080 Polymers, plastics and their manufacture Buys, Yose Fachmi Anuar, Hazleen Study on miscibility and degradation behavior of polylactic acid / thermoplastic polyurethane blends
description	Polylactic acid (PLA) has attracted tremendous interest to be used as an alternative to replace the petroleum-based polymers as it possesses good biodegradability, can be derived from renewable sources and shows high mechanical strength. However, its inherent brittleness and low toughness has limited its usage in broader applications. In this work, PLA was melt blended with tough thermoplastic polyurethanes (TPU) in order to produce ecofriendly polymeric materials with balanced mechanical properties. Moreover, the miscibility and the hydrolytic degradation behavior of PLA/TPU blends were also investigated as it is important to control materials degradation behavior in some applications. Five compositions of specimens were prepared by melt blending PLA with TPU using an internal mixer, followed by compression molding. Tensile and impact tests were performed to evaluate the mechanical properties. From the tests, it was apparent that the elongation-at-break and impact strength of the blends increased, as the TPU content increased. Dynamic Mechanical Analysis (DMA) and Scanning Electron Microscopy (SEM) observation were conducted to evaluate the miscibility of PLA/TPU blends. DMA results of the blends revealed two tangent delta peaks, indicated that the blends were immiscible, and the sea-island structure appeared at PLA/TPU 75/25 vol% SEM photograph supported this trend. Finally, hydrolytic degradation behavior of PLA, TPU, and PLA/TPU blends was investigated by measuring the weight loss after immersion the specimens in alkaline solution at predetermined time. It was found that the degradation behavior is affected by blend composition, where PLA/TPU 50/50 vol% showed the fastest degradation rate. This unique result might be ascribed to the cocontinuous morphology shown in the PLA/TPU blend 50/50 vol%.
format	Monograph
author	Buys, Yose Fachmi Anuar, Hazleen
author_facet	Buys, Yose Fachmi Anuar, Hazleen
author_sort	Buys, Yose Fachmi
title	Study on miscibility and degradation behavior of polylactic acid / thermoplastic polyurethane blends
title_short	Study on miscibility and degradation behavior of polylactic acid / thermoplastic polyurethane blends
title_full	Study on miscibility and degradation behavior of polylactic acid / thermoplastic polyurethane blends
title_fullStr	Study on miscibility and degradation behavior of polylactic acid / thermoplastic polyurethane blends
title_full_unstemmed	Study on miscibility and degradation behavior of polylactic acid / thermoplastic polyurethane blends
title_sort	study on miscibility and degradation behavior of polylactic acid / thermoplastic polyurethane blends
publishDate	2018
url	http://irep.iium.edu.my/69104/ http://irep.iium.edu.my/69104/1/RESEARCH%20REPORT%20-%20YFB%20-%2020181231.pdf
first_indexed	2023-09-18T21:38:04Z
last_indexed	2023-09-18T21:38:04Z
_version_	1777412955171717120

Study on miscibility and degradation behavior of polylactic acid / thermoplastic polyurethane blends

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