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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