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INTERNATIONAL JOURNAL OF PHARMACEUTICAL RESEARCH

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IJPR included in UGC-Approved List of Journals - Ref. No. is SL. No. 4812 & J. No. 63703

Published by : Advanced Scientific Research
ISSN
0975-2366
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IJPR 9[3] July - September 2017 Special Issue

July - September 9[3] 2017

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Study of thermal degradation of plasticized poly (4-ethoxystyrene) in solution and solid films

Author: SHAHAD ALI, WADHAH N. AL SEAIDI, KHALID E. AL ANI
Abstract: The thermal effect and blending with phthalate and terephthalate plasticizers on the stability of poly (4-ethoxystyrene) was studied within a temperature ranged from 298 to 353 K, and at different intervals of heating time (0-42) hr. The increase in heating time increases the absorption intensity of UV-band of the polymer, which indicates that polymeric chains may be thermally degraded. The fluorescence spectrum of poly (4-ethoxystyrene) was found to be majorly excited dimer emission (excimeric emission) at room temperature. However, at higher temperatures, increasing the heating time will quench emission. Added phthalate and terephthalate plasticizers to poly (4-ethoxystyrene) quenched the excimeric emission, also increased the new band emission. It has been found that increasing the heating time and the amount of added phthalate and terephthalate plasticizers could possibly decreases the stability of the polymer, which represent a good indication of degrading the polymer. The thermal degradation of poly (4-ethoxystyrene) with different amounts of phthalate and terephthalate plasticizers has been studied using UV-VIS and fluorescence spectroscopic techniques.
Keyword: Polymeric additives; Degradation Kinetics; Irradiation Effect; Thermal degradation; poly (4- ethoxystyrene).
DOI: https://doi.org/10.31838/ijpr/2020.12.03.067
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0.12
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