Effects of compatibilizer on morphology, mechanical and thermal properties of polylactic acid/natural rubber blend

The primary focus of this study was to prepare two types of compatibilizers, i.e. polylactic acid-grafted-maleic anhydride (PLA-g-MA) and natural rubbergrafted- maleic anhydride (NR-g-MA) for PLA/NR blends. In the first phase of the study, PLA/NR blends with different NR concentration in the range o...

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Main Author:	Abdullah Sani, Nur Syazana
Format:	Thesis
Language:	English
Published:	2015
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/81471/1/NurSyazanaAbdullahMFChE2015.pdf
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spelling	my-utm-ep.814712019-08-23T05:18:59Z Effects of compatibilizer on morphology, mechanical and thermal properties of polylactic acid/natural rubber blend 2015 Abdullah Sani, Nur Syazana TP Chemical technology The primary focus of this study was to prepare two types of compatibilizers, i.e. polylactic acid-grafted-maleic anhydride (PLA-g-MA) and natural rubbergrafted- maleic anhydride (NR-g-MA) for PLA/NR blends. In the first phase of the study, PLA/NR blends with different NR concentration in the range of 5 to 20 wt% were fabricated. Experimental results showed that PLA/NR blend containing 5 wt% of NR concentration (designated as PLA95/NR5) was the optimum blend due to its higher impact strength (35.74 J/m) and elongation at break (1.84%) as compared to other PLA/NR blends. In the second phase of the study, the two types of compatibilizers (PLA-g-MA and NR-g-MA) with different MA concentrations in the range of 3 to 12 phr were prepared using melt grafting free-radical polymerization method. It was found that the optimum MA concentration for grafting PLA and NR were both 9 phr with the degree of grafting of 1.63% and 5.02%, respectively. In the third phase, the PLA95/NR5 blend was incorporated with different compatibilizers (PLA-g-MA and NR-g-MA) at various loadings (1-10 phr). The experimental results of the mechanical properties, i.e. impact strength, elongation at break and storage modulus of the PLA95/NR5 blend did not show significant enhancement upon addition of PLA-g-MA in the blend. Scanning electron microscope results showed better interfacial adhesion between PLA and NR phases upon addition of 3 phr PLAg- MA into the blend. The improvement in the interfacial adhesion of the blend could be attributed to the good dispersion of the NR particles in the PLA matrix with the aid of PLA-g-MA compatibilizer. On the contrary, the addition of NR-g-MA did not show much improvement in the mechanical properties of the PLA95/NR5 blend but thermal stability of the blend was increased as compared to the PLA95/NR5. In all tests, further increased of PLA-g-MA and NR-g-MA up to 5 phr and 10 phr, respectively in the PLA95/NR5 blend caused the blend stiffness to increase. This possibly due to an increase in the amount of MA and the reduction of NR elasticity. 2015 Thesis http://eprints.utm.my/id/eprint/81471/ http://eprints.utm.my/id/eprint/81471/1/NurSyazanaAbdullahMFChE2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:120066 masters Universiti Teknologi Malaysia Chemical and Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Abdullah Sani, Nur Syazana Effects of compatibilizer on morphology, mechanical and thermal properties of polylactic acid/natural rubber blend
description	The primary focus of this study was to prepare two types of compatibilizers, i.e. polylactic acid-grafted-maleic anhydride (PLA-g-MA) and natural rubbergrafted- maleic anhydride (NR-g-MA) for PLA/NR blends. In the first phase of the study, PLA/NR blends with different NR concentration in the range of 5 to 20 wt% were fabricated. Experimental results showed that PLA/NR blend containing 5 wt% of NR concentration (designated as PLA95/NR5) was the optimum blend due to its higher impact strength (35.74 J/m) and elongation at break (1.84%) as compared to other PLA/NR blends. In the second phase of the study, the two types of compatibilizers (PLA-g-MA and NR-g-MA) with different MA concentrations in the range of 3 to 12 phr were prepared using melt grafting free-radical polymerization method. It was found that the optimum MA concentration for grafting PLA and NR were both 9 phr with the degree of grafting of 1.63% and 5.02%, respectively. In the third phase, the PLA95/NR5 blend was incorporated with different compatibilizers (PLA-g-MA and NR-g-MA) at various loadings (1-10 phr). The experimental results of the mechanical properties, i.e. impact strength, elongation at break and storage modulus of the PLA95/NR5 blend did not show significant enhancement upon addition of PLA-g-MA in the blend. Scanning electron microscope results showed better interfacial adhesion between PLA and NR phases upon addition of 3 phr PLAg- MA into the blend. The improvement in the interfacial adhesion of the blend could be attributed to the good dispersion of the NR particles in the PLA matrix with the aid of PLA-g-MA compatibilizer. On the contrary, the addition of NR-g-MA did not show much improvement in the mechanical properties of the PLA95/NR5 blend but thermal stability of the blend was increased as compared to the PLA95/NR5. In all tests, further increased of PLA-g-MA and NR-g-MA up to 5 phr and 10 phr, respectively in the PLA95/NR5 blend caused the blend stiffness to increase. This possibly due to an increase in the amount of MA and the reduction of NR elasticity.
format	Thesis
qualification_level	Master's degree
author	Abdullah Sani, Nur Syazana
author_facet	Abdullah Sani, Nur Syazana
author_sort	Abdullah Sani, Nur Syazana
title	Effects of compatibilizer on morphology, mechanical and thermal properties of polylactic acid/natural rubber blend
title_short	Effects of compatibilizer on morphology, mechanical and thermal properties of polylactic acid/natural rubber blend
title_full	Effects of compatibilizer on morphology, mechanical and thermal properties of polylactic acid/natural rubber blend
title_fullStr	Effects of compatibilizer on morphology, mechanical and thermal properties of polylactic acid/natural rubber blend
title_full_unstemmed	Effects of compatibilizer on morphology, mechanical and thermal properties of polylactic acid/natural rubber blend
title_sort	effects of compatibilizer on morphology, mechanical and thermal properties of polylactic acid/natural rubber blend
granting_institution	Universiti Teknologi Malaysia
granting_department	Chemical and Energy Engineering
publishDate	2015
url	http://eprints.utm.my/id/eprint/81471/1/NurSyazanaAbdullahMFChE2015.pdf
_version_	1747818339450748928

Effects of compatibilizer on morphology, mechanical and thermal properties of polylactic acid/natural rubber blend

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