Malaysian Journal of Analytical Sciences Vol 19 No
1 (2015): 213 – 221
PHOTOSTABILIZING
EFFICIENCY OF PVC BASED ON EPOXIDIZED OLEIC ACID
(Kecekapan
Kestabilanfoto Filem PVC berasaskan Asid Oleik Terepoksida)
Emad Yousif1
, Rahimi M. Yusop2,3*, Ahmed Ahmed1, Jumat Salimon2,
Nadia Salih2
1Department
of Chemistry, College of Science,
Al-Nahrain University,
Baghdad, Iraq
2School
of Chemical Sciences and Food Technology, Faculty of Science and Technology,
Universiti Kebangsaan
Malaysia, 43600 Bangi, Selangor, Malaysia
3Regenerative
Advanced Medical & Dental Institute,
Universiti Sains
Malaysia, 13200 Bertam Kepala Batas, Pulau Pinang, Malaysia
*Corresponding author: rahimi@ukm.edu.my
Abstract
The photostabilization of poly (vinyl chloride) (PVC) films
by epoxidized oleic acid compounds was investigated. The PVC films containing
concentration of complexes 0.5% by weight were produced by the casting method
from tetrahydrofuran (THF) solvent. The photostabilization activities of these
compounds were determined by monitoring the carbonyl, polyene and hydroxyl
indices with irradiation time. The changes in viscosity average molecular
weight of PVC with irradiation time were also tracked (using THF as a solvent).
The quantum yield of the chain scission (Φcs)
of these complexes in PVC films was evaluated and found to range between
4.98´10-8 and 8.72´10-8. According to the experimental
results obtained, mechanisms were suggested depending on the structure of the
additive (oleic acid).
Keywords: photostabilizer,
PVC, oleic acid
Abstrak
Proses kestabilanfoto filem poli(vinil klorida) (PVC) dengan
asid oleik terepoksida telah dikaji. Filem PVC yang mengandungi kompleks
berkepekatan 0.5% berat telah dihasilkan dengan kaedah acuan yang sama daripada
pelarut tetrahidrofuran (THF). Aktiviti kestabilanfoto sebatian-sebatian ini
ditentukan dengan pengawasan indeks karbonil, poliena dan hidroksi dengan masa
penyinaran. Perubahan dalam kelikatan berat molekul purata bagi PVC dengan masa
penyinaran turut dikesan (menggunakan THF sebagai pelarut). Hasil kuantum
rantai guntingan (Φcs) kompleks-kompleks ini di dalam filem-filem PVC
telah dikira dan di dapati berada dalam julat 4.98´10-8
and 8.72´10-8. Berdasarkan keputusan eksperimen yang diperolehi,
beberapa mekanisme telah dicadangkan bergantung kepada struktur bahan tambah
yang digunakan (asid oleic).
Kata kunci: kestabilanfoto, PVC, asid oleik
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