Effects of Additives on Thermal Degadation of Substituted Plystyrene in Solid Films and in Solutions
- مجال مشروع البحث–الرئيسي
- العلوم الطبية والصحية
- مجال مشروع البحث–الثانوي
- العلوم الصيدلانية
- المؤسسة العلمية
- جامعة العلوم والتكنولوجيا الأردنية
- المحافظة
- اربد
- قيمة الدعم
- JD11500
- سنة الدعم
- 2001
- حالة المشروع
- منتهي مع النشر
- البحث منشور
- Al Ani, K. E., Al Barghouthi, M., & Al Buzour, M. (2006). Solvent effect on thermal degradation of plasticized para-substituted polystyrenes. Polymer degradation and stability, 91(12), 3252-3258.
- ملخص عن مشروع البحث
- The thermal effect on stability of a series of para-substituted polystyrenes with methyl, methoxy and α-methyl substituents in various solvents was studied in the temperature range of 298–363 K. They gave a monomer fluorescence as a minor part and excimer fluorescence as a major part. Thermal heating of para-substituted polystyrenes shows a decrease in both monomer and excimer fluorescences in all used solvents. Thermal heating causes a small fluorescence quenching effect at lower temperatures in solution but becomes very dominant at higher temperatures. Added terephthalate and phthalate plasticizers to these para-substituted polystyrenes caused a quenching of both monomer and excimer fluorescences without the formation of exciplex emission. The thermal quenching processes of the plasticized polymers were accompanied by a change in the structure of the fluorescence spectra at high heating temperatures. This may indicate that thermodestruction of these polymers starts from a random chain scission. The change in solvent polarity has considerable effect on fluorescence quenching but it has a minor effect on the thermal degradation of these polymers. The binding energies for excimer formation were calculated in the used solvents.
https://www.sciencedirect.com/science/article/pii/S0141391006002138
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الاسم الكامل للباحث الرئيسي
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