Improved photostability of PVC films in the presence of 2-thioacetic acid-5-phenyl-1,3,4-oxadiazole complexes

Emad A. YOUSIF; Salah M. ALIWI; Ameer A. AMEER

Makale detayları

Improved photostability of PVC films in the presence of 2-thioacetic acid-5-phenyl-1,3,4-oxadiazole complexes

Yazarlar:

Emad A. YOUSIF | Salah M. ALIWI | Ameer A. AMEER

Yayıncı:

TUBITAK

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Turkish Journal of Chemistry 2009 Vol.33 Issue 3, pp.399-410

Belge Tipi:

Makale

Yayın Tarihi:

2/2009

Belge Dili:

İngilizce

Document ID (Org No.):

2000728300

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

The photostabilization of poly(vinyl chloride) (PVC) films  by 2-thioacetic acid-5-phenyl-1,3,4-oxadiazole with Sn(II), Ba(II),  Ni(II), Zn(II), Cu(II), and Ca(II) complexes was investigated.  PVC  films containing different concentrations of complexes ranging from  0.1% to 0.5% by weight were produced by the same casting method from  THF solvent.    The photostabilization activities of these compounds were determined  by monitoring the carbonyl and polyene 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 (F cs) of these complexes  in PVC films was evaluated and found to range between 4.94 \times 10-8  and 1.61 \times 10-7.    The results obtained showed that the rate of photostabilization of PVC  in the presence of the additive follows the trend:    Sn(OX)2  > Ba(OX)2  > Zn(OX)2  > Ni(OX)2  > Cu(OX)2  > Ca(OX)2  > OX    Based on the experimental results obtained, several mechanisms were  suggested depending on the structure of the additive.  HCl scavenging,  UV absorption, peroxide decomposer and radical scavenger for  photo-stabilizer additives mechanisms were suggested.

 

The photostabilization of poly(vinyl chloride) (PVC) films  by 2-thioacetic acid-5-phenyl-1,3,4-oxadiazole with Sn(II), Ba(II),  Ni(II), Zn(II), Cu(II), and Ca(II) complexes was investigated.  PVC  films containing different concentrations of complexes ranging from  0.1% to 0.5% by weight were produced by the same casting method from  THF solvent.    The photostabilization activities of these compounds were determined  by monitoring the carbonyl and polyene 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 (F cs) of these complexes  in PVC films was evaluated and found to range between 4.94 \times 10-8  and 1.61 \times 10-7.    The results obtained showed that the rate of photostabilization of PVC  in the presence of the additive follows the trend:    Sn(OX)2  > Ba(OX)2  > Zn(OX)2  > Ni(OX)2  > Cu(OX)2  > Ca(OX)2  > OX    Based on the experimental results obtained, several mechanisms were  suggested depending on the structure of the additive.  HCl scavenging,  UV absorption, peroxide decomposer and radical scavenger for  photo-stabilizer additives mechanisms were suggested.

Makale detayları

Improved photostability of PVC films in the presence of 2-thioacetic acid-5-phenyl-1,3,4-oxadiazole complexes

Yazarlar: Emad A. YOUSIF | Salah M. ALIWI | Ameer A. AMEER

Yayıncı: TUBITAK

Ana Başlıklar: Uygulamalı fizik

Dergi: Turkish Journal of Chemistry 2009 Vol.33 Issue 3, pp.399-410

Belge Tipi: Makale

Yayın Tarihi: 2/2009

Belge Dili: İngilizce

Document ID (Org No.): 2000728300

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Emad A. YOUSIF | Salah M. ALIWI | Ameer A. AMEER

Yayıncı:

TUBITAK

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Turkish Journal of Chemistry 2009 Vol.33 Issue 3, pp.399-410

Belge Tipi:

Makale

Yayın Tarihi:

2/2009

Belge Dili:

İngilizce

Document ID (Org No.):

2000728300

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527