Preparation and characterization of polylactic acid / modified rock stone / strach biocomposites

The main purpose of this study was to investigate the effects of starch and a new phthalate-free plasticizer, which was modified rock stone (MR) on the mechanical, physical, thermal and biodegrability properties of polylactic acid (PLA). The biocomposites of PLA, MR and starch were prepared by extru...

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Main Author:	Ahmad, Muhammad Akmal
Format:	Thesis
Language:	English
Published:	2016
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/78236/1/MuhammadAkmalAhmadMFChE2016.pdf
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spelling	my-utm-ep.782362018-07-30T08:51:32Z Preparation and characterization of polylactic acid / modified rock stone / strach biocomposites 2016-06 Ahmad, Muhammad Akmal TP Chemical technology The main purpose of this study was to investigate the effects of starch and a new phthalate-free plasticizer, which was modified rock stone (MR) on the mechanical, physical, thermal and biodegrability properties of polylactic acid (PLA). The biocomposites of PLA, MR and starch were prepared by extrusion method and injection molded into standard tensile and flexural shape. The properties of the biocomposites were tested and characterized by using tensile and flexural tests, melt flow index, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and water absorption test. The investigation of biodegradation of the biocomposites was done by soil burial test. Test results showed that MR improved the mechanical properties up to 30 w/w% and the optimum MR content was 16.6 w/w% (PM0). The test results also showed that MR acted as reinforcement filler but not as plasticizer because there was a decrease in flow rate and no change in glass transition temperature. When starch was added to the PLA/MR biocomposites, the mechanical properties of the biocomposites were reduced probably due to the agglomeration of starch particles. Optimum starch content was 15 w/w% (PMS15). After the blending of PLA with MR and starch, the pure PLA, PM0 and PMS15 samples were compared. FTIR and SEM results showed that MR was compatible with PLA and that starch interfered with the compatibility of PLA and MR. DSC results also showed that the addition of MR and starch to PLA did not affect the crystallinity of the biocomposite. Addition of starch improved the amount of water uptake and the percentage weight loss during soil burial test because starch is hydrophilic and can be hydrolyzed by microorganisms. 2016-06 Thesis http://eprints.utm.my/id/eprint/78236/ http://eprints.utm.my/id/eprint/78236/1/MuhammadAkmalAhmadMFChE2016.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:94164 masters Universiti Teknologi Malaysia, Faculty of Chemical Engineering Faculty of Chemical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Ahmad, Muhammad Akmal Preparation and characterization of polylactic acid / modified rock stone / strach biocomposites
description	The main purpose of this study was to investigate the effects of starch and a new phthalate-free plasticizer, which was modified rock stone (MR) on the mechanical, physical, thermal and biodegrability properties of polylactic acid (PLA). The biocomposites of PLA, MR and starch were prepared by extrusion method and injection molded into standard tensile and flexural shape. The properties of the biocomposites were tested and characterized by using tensile and flexural tests, melt flow index, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and water absorption test. The investigation of biodegradation of the biocomposites was done by soil burial test. Test results showed that MR improved the mechanical properties up to 30 w/w% and the optimum MR content was 16.6 w/w% (PM0). The test results also showed that MR acted as reinforcement filler but not as plasticizer because there was a decrease in flow rate and no change in glass transition temperature. When starch was added to the PLA/MR biocomposites, the mechanical properties of the biocomposites were reduced probably due to the agglomeration of starch particles. Optimum starch content was 15 w/w% (PMS15). After the blending of PLA with MR and starch, the pure PLA, PM0 and PMS15 samples were compared. FTIR and SEM results showed that MR was compatible with PLA and that starch interfered with the compatibility of PLA and MR. DSC results also showed that the addition of MR and starch to PLA did not affect the crystallinity of the biocomposite. Addition of starch improved the amount of water uptake and the percentage weight loss during soil burial test because starch is hydrophilic and can be hydrolyzed by microorganisms.
format	Thesis
qualification_level	Master's degree
author	Ahmad, Muhammad Akmal
author_facet	Ahmad, Muhammad Akmal
author_sort	Ahmad, Muhammad Akmal
title	Preparation and characterization of polylactic acid / modified rock stone / strach biocomposites
title_short	Preparation and characterization of polylactic acid / modified rock stone / strach biocomposites
title_full	Preparation and characterization of polylactic acid / modified rock stone / strach biocomposites
title_fullStr	Preparation and characterization of polylactic acid / modified rock stone / strach biocomposites
title_full_unstemmed	Preparation and characterization of polylactic acid / modified rock stone / strach biocomposites
title_sort	preparation and characterization of polylactic acid / modified rock stone / strach biocomposites
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical Engineering
granting_department	Faculty of Chemical Engineering
publishDate	2016
url	http://eprints.utm.my/id/eprint/78236/1/MuhammadAkmalAhmadMFChE2016.pdf
_version_	1747817940384743424

Preparation and characterization of polylactic acid / modified rock stone / strach biocomposites

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