dc.contributor.advisor |
Gunapala, O |
|
dc.contributor.author |
Udayakumara, SV |
|
dc.date.accessioned |
2015-10-22T10:42:00Z |
|
dc.date.available |
2015-10-22T10:42:00Z |
|
dc.date.issued |
2015-10-22 |
|
dc.identifier.uri |
http://dl.lib.mrt.ac.lk/handle/123/11490 |
|
dc.description.abstract |
In modern world, plastics play a significant role in our daily life. However Sri
Lankans' still have not introduced proper waste management system to daily
increasing plastic garbage.
Polyethylene terephthalate (PET) is one of the main plastic used in day today life as
packaging material, soft drink and mineral water bottles. Sri Lankan peoples alone
consumes 6.5 million PET bottles per month but only 1.5 million bottles collected for
recycling. This gives clear indication about the role of PET in environmental
pollution.
This report present development of effective chemical recycling process to depolymerize
PET waste into its initial monomers and use of de-polymerized products
to synthesized alkyd resin which can be use in coating industry.
Depolymerization of PET was done by hydrolysis method to extract terephthalic
acid(TPA) . Here Na2CO3 was successfully used as hydrolysis agent instead of highly
corrosive NaOH . This overcome the common disadvantages of NaOH .
At 170 °C, 35 minutes and 1:4 PET: EG (ethylene glycol) mole ratio 78.89% PET
was reacted with Na2CO3 without any catalyst.
Recovered terephthalic acid was used to replace Phthalic anhydride in alkyd resin.
Due to the inability of conventional alcoholysis method to making alkyd resin from
TPA, a new methodology was developed. New Process was successfully
incorporated to produce long oil alkyd resin with soya oil, glycerin, maleic anhydride
and recovered TPA. Under this new method alkyd processing time was greatly
reduced and minimum time achieved was 120 minutes at 280 °C.
Practical application of this project to the local PET waste will help to reduce the
plastic land fill in Sri Lanka and also provide more beneficial effects to the alkyd
paint industry by reducing production time and raw material cost. |
en_US |
dc.language.iso |
en |
en_US |
dc.subject |
Materials Science and Engineering |
|
dc.subject |
Plastic Waste Management - Sri Lanka |
|
dc.title |
Use of hydrolysis products of polythylene terephthalate scraps to produce alkyd based paint |
en_US |
dc.type |
Thesis-Full-text |
en_US |
dc.identifier.faculty |
Engineering |
en_US |
dc.identifier.degree |
Master of Philosophy in Materials Science & Engineering |
en_US |
dc.identifier.department |
Department of Materials Science and Engineering |
en_US |
dc.date.accept |
2015-07 |
|
dc.identifier.accno |
109303 |
en_US |