Synthesis and characterization of epoxidized palm oil based polyol-silane coated film / Siti Munira Yahaya

Epoxidized palm oil (EPO) based polyols were produced from three different molar ratios of EPO and glycerol (1:1.0, 1:1.5, 1:2.0) via hydroxylation reaction. The reduction of oxirane content from 2.9 to 0.04%, the increase in hydroxyl value to 509.6 mgKOH/g and high viscosity of synthesized polyols...

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Main Author:	Yahaya, Siti Munira
Format:	Thesis
Language:	English
Published:	2016
Online Access:	http://ir.uitm.edu.my/id/eprint/17886/ http://ir.uitm.edu.my/id/eprint/17886/2/TM_SITI%20MUNIRA%20YAHAYA%20AS%2016_5.pdf

id	uitm-17886
recordtype	eprints
spelling	uitm-178862018-10-11T02:56:26Z http://ir.uitm.edu.my/id/eprint/17886/ Synthesis and characterization of epoxidized palm oil based polyol-silane coated film / Siti Munira Yahaya Yahaya, Siti Munira Epoxidized palm oil (EPO) based polyols were produced from three different molar ratios of EPO and glycerol (1:1.0, 1:1.5, 1:2.0) via hydroxylation reaction. The reduction of oxirane content from 2.9 to 0.04%, the increase in hydroxyl value to 509.6 mgKOH/g and high viscosity of synthesized polyols indicates the opening of epoxy ring and also showed the grafting process had been occurred. Based on FTIR and NMR spectrum, hydroxyl group has been chemically grafted onto the opened epoxy ring of EPO. Polyol-1.5 synthesized from 1 mol of EPO react with 1.5 mol of glycerol was chosen in formulating polyol-silane resin due to its optimum properties and characteristics compared with others. The polyol-1.5 was mixed with different types of silane and hardener to formulate polyol-silane resin. Each silanes was varied with three different weight percentages (10, 30 and 50 wt %). Result shows that only polyol-3-Isocyanatepropyltrimethoxysilane (ICPTES) resin was successfully formed coated film. The disappearance of OH groups at 3450 cm'1 and detection of strong siloxane, Si-O-Si signal at 1077 cm"1 showed silane was chemically grafted. Based on Thermogravimetric analysis (TGA), it showed that the degradation temperature (Td) of all coated films was increased with the addition of percentage of silane. However, the glass transition temperature (Tg) of coated film obtained from Differential Scanning Calorimetric (DSC), did not follow the same trends. The Tg of sample with 50 wt% of silane exhibits lower Tg than sample with 30 wt% of silane. This may due to the fact that the greater functionality of siloxane network contributing to poor chain rigidity. Meanwhile, the hardness and adhesion strength of coated film increased as the percentage of silane used increased due to excellent structural compatibility of mixture which formed crosslinked polymer. Wettability and surface energy of film was determined using water contact angle analyzer and results showed that the polyol- ICPTES coated film formed hydrophobic and water-repellent surface which is good to used as sealant and adhesives. 2016 Thesis NonPeerReviewed text en http://ir.uitm.edu.my/id/eprint/17886/2/TM_SITI%20MUNIRA%20YAHAYA%20AS%2016_5.pdf Yahaya, Siti Munira (2016) Synthesis and characterization of epoxidized palm oil based polyol-silane coated film / Siti Munira Yahaya. Masters thesis, Universiti Teknologi MARA.
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Teknologi MARA
building	UiTM Institutional Repository
collection	Online Access
language	English
description	Epoxidized palm oil (EPO) based polyols were produced from three different molar ratios of EPO and glycerol (1:1.0, 1:1.5, 1:2.0) via hydroxylation reaction. The reduction of oxirane content from 2.9 to 0.04%, the increase in hydroxyl value to 509.6 mgKOH/g and high viscosity of synthesized polyols indicates the opening of epoxy ring and also showed the grafting process had been occurred. Based on FTIR and NMR spectrum, hydroxyl group has been chemically grafted onto the opened epoxy ring of EPO. Polyol-1.5 synthesized from 1 mol of EPO react with 1.5 mol of glycerol was chosen in formulating polyol-silane resin due to its optimum properties and characteristics compared with others. The polyol-1.5 was mixed with different types of silane and hardener to formulate polyol-silane resin. Each silanes was varied with three different weight percentages (10, 30 and 50 wt %). Result shows that only polyol-3-Isocyanatepropyltrimethoxysilane (ICPTES) resin was successfully formed coated film. The disappearance of OH groups at 3450 cm'1 and detection of strong siloxane, Si-O-Si signal at 1077 cm"1 showed silane was chemically grafted. Based on Thermogravimetric analysis (TGA), it showed that the degradation temperature (Td) of all coated films was increased with the addition of percentage of silane. However, the glass transition temperature (Tg) of coated film obtained from Differential Scanning Calorimetric (DSC), did not follow the same trends. The Tg of sample with 50 wt% of silane exhibits lower Tg than sample with 30 wt% of silane. This may due to the fact that the greater functionality of siloxane network contributing to poor chain rigidity. Meanwhile, the hardness and adhesion strength of coated film increased as the percentage of silane used increased due to excellent structural compatibility of mixture which formed crosslinked polymer. Wettability and surface energy of film was determined using water contact angle analyzer and results showed that the polyol- ICPTES coated film formed hydrophobic and water-repellent surface which is good to used as sealant and adhesives.
format	Thesis
author	Yahaya, Siti Munira
spellingShingle	Yahaya, Siti Munira Synthesis and characterization of epoxidized palm oil based polyol-silane coated film / Siti Munira Yahaya
author_facet	Yahaya, Siti Munira
author_sort	Yahaya, Siti Munira
title	Synthesis and characterization of epoxidized palm oil based polyol-silane coated film / Siti Munira Yahaya
title_short	Synthesis and characterization of epoxidized palm oil based polyol-silane coated film / Siti Munira Yahaya
title_full	Synthesis and characterization of epoxidized palm oil based polyol-silane coated film / Siti Munira Yahaya
title_fullStr	Synthesis and characterization of epoxidized palm oil based polyol-silane coated film / Siti Munira Yahaya
title_full_unstemmed	Synthesis and characterization of epoxidized palm oil based polyol-silane coated film / Siti Munira Yahaya
title_sort	synthesis and characterization of epoxidized palm oil based polyol-silane coated film / siti munira yahaya
publishDate	2016
url	http://ir.uitm.edu.my/id/eprint/17886/ http://ir.uitm.edu.my/id/eprint/17886/2/TM_SITI%20MUNIRA%20YAHAYA%20AS%2016_5.pdf
first_indexed	2023-09-18T22:59:16Z
last_indexed	2023-09-18T22:59:16Z
_version_	1777418063419801600

Synthesis and characterization of epoxidized palm oil based polyol-silane coated film / Siti Munira Yahaya

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