Preparation And Properties Of Kenaf Bast Fiber Filled (Plasticized) Poly(Lactic Acid) Composites

Ramarad, Suganti (2008) Preparation And Properties Of Kenaf Bast Fiber Filled (Plasticized) Poly(Lactic Acid) Composites. Masters thesis, Universiti Sains Malaysia.

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Abstract

Komposit poli(Iaktik asid) diplastik (p-PLA) terisi gentian kayu kenaf (KBF) telah disediakan dan dikaji secara berperingkat. Pertamanya, poli(Iaktik asid) (PLA) telah diperlembutkan dengan 5 hingga 20% berat poli(etilena glikol) (PEG) menggunakan pencampur dalaman. Adunan dengan 10% berat PEG dipilih sebagai matriks komposit kerana ia mempunyai kekuatan hentaman dan pemanjangan takat putus yang terbaik. Kedua, PLA dicangkuk maleik anhidrat (MAPLA) berjaya dihasilkan dengan 0.22% pencangkukan melalui kaedah pencangkukan reaktif Komposit p-PLA/KBF telah disebatikan di dalam pencampur dalaman dan diacuan mampat ke bentuk sampel ujian. Kandungan KBF diubah dari 10 hingga 40% berat. Pencirian telah dilakukan melalui ujian tensil dan hentaman, analisis mekanikal dinamik, penyerapan air, penanaman dalam tanah dan pencuacaan semulajadi. Pad a pembebanan 40% berat KBF, kekuatan tensil dan modulus masing-masing meningkat sebanyak 120% dan 213%, manakala pemanjangan takat putus dan kekuatan hentaman masing-masing menurun sebanyak 99% dan 52%, berbanding pPLA tidak terisi KBF. Kenaf bast fiber (KBF) filled plasticized poly(lactic acid) (p-PLA) composites was prepared and examined stage by stage in this study. Firstly, poly(lactic acid) (PLA) was plasticized with 5 up to 20 wt% poly(ethylene glycol) (PEG) via internal mixer. Blend with 10 wt% PEG was chosen as matrix for composite as it showed the best impact strength and elongation at break. Secondly, maleic anhydride grafted PLA (MAPLA) was successfully produced with 0.22% grafting using reactive grafting method, and used as a compatibilizer for the composite system. p-PLAlKBF composite was compounded via internal mixer and compression molded into test specimens. KBF loading was varied from 10 to 40 wt%. Characterization was done by means of tensile and impact testing, dynamic mechanical analysis, water absorption, soil burial and natural weathering. At 40 wt% KBF loading, tensile strength and modulus improved by 120% and 213% respectively, while strain at break and impact strength dropped by 99% and 52% respectively compared to neat p-PLA.

Item Type:	Thesis (Masters)
Subjects:	T Technology > TN Mining Engineering. Metallurgy > TN1-997 Mining engineering. Metallurgy
Divisions:	Kampus Kejuruteraan (Engineering Campus) > Pusat Pengajian Kejuruteraan Bahan & Sumber Mineral (School of Material & Mineral Resource Engineering) > Thesis
Depositing User:	HJ Hazwani Jamaluddin
Date Deposited:	03 Jan 2017 08:10
Last Modified:	15 May 2017 08:05
URI:	http://eprints.usm.my/id/eprint/31364

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