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Synthesis of New Thiophene Derivatives and Their Use as Photostabilizers for Rigid Poly(vinyl chloride)
المؤلفون المشاركون
El-Hiti, Gamal A.
Yousif, Emad
Balakit, Asim A.
Ahmed, Ahmed
Smith, Keith
المصدر
International Journal of Polymer Science
العدد
المجلد 2015، العدد 2015 (31 ديسمبر/كانون الأول 2015)، ص ص. 1-10، 10ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2015-01-13
دولة النشر
مصر
عدد الصفحات
10
التخصصات الرئيسية
الملخص EN
Five new thiophenes, namely, N-[(3-bromo-2-methylthiophen-5-yl)methylene]-4-methoxyaniline (4a), N-[(3-bromo-2-methylthiophen-5-yl)methylene]-3,4-dimethoxyaniline (4b), N-[(3-bromo-2-methylthiophen-5-yl)methylene]-3,4-dimethylaniline (4c), 3-[(3-bromo-2-methylthiophen-5-yl)methyleneamino]-2-methylquinazolin-4(3H)-one (4d), and 3-[(3-bromo-2-methylthiophen-5-yl)methyleneamino]-2-isopropylquinazolin-4(3H)-one (4e), have been synthesized.
All of these materials brought about a reduction in the level of photodegradation of poly(vinyl chloride) (PVC) films containing the synthesized thiophenes (0.5%; by weight).
The results obtained showed that the extent of photostabilization of PVC in the presence of an additive was in the order 4e > 4d > 4b > 4a > 4c.
For the most favorable additive (4e), the rate of appearance of infrared absorption bands of degradation products was reduced by around two-thirds, while the quantum yield of chain scission was calculated to be reduced by a factor of more than one thousand.
It is suggested that the additives may help stabilize PVC by direct absorption of UV radiation and dissipation of the energy as heat or that electrostatic attraction between the additives and PVC may assist transfer of energy from excited state PVC to the additive, from where it can be dissipated.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Balakit, Asim A.& Ahmed, Ahmed& El-Hiti, Gamal A.& Smith, Keith& Yousif, Emad. 2015. Synthesis of New Thiophene Derivatives and Their Use as Photostabilizers for Rigid Poly(vinyl chloride). International Journal of Polymer Science،Vol. 2015, no. 2015, pp.1-10.
https://search.emarefa.net/detail/BIM-1066790
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Balakit, Asim A.…[et al.]. Synthesis of New Thiophene Derivatives and Their Use as Photostabilizers for Rigid Poly(vinyl chloride). International Journal of Polymer Science No. 2015 (2015), pp.1-10.
https://search.emarefa.net/detail/BIM-1066790
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Balakit, Asim A.& Ahmed, Ahmed& El-Hiti, Gamal A.& Smith, Keith& Yousif, Emad. Synthesis of New Thiophene Derivatives and Their Use as Photostabilizers for Rigid Poly(vinyl chloride). International Journal of Polymer Science. 2015. Vol. 2015, no. 2015, pp.1-10.
https://search.emarefa.net/detail/BIM-1066790
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1066790
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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