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首页> 外文期刊>Der Pharma Chemica: journal for medicinal chemistry, pharmaceutical chemistry and computational chemistry >Thermal degradation studies of high performance copolymer resin derived from 8-hydroxyquinoline 5-sulphonic acid, semicarbazide and formaldehyde
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Thermal degradation studies of high performance copolymer resin derived from 8-hydroxyquinoline 5-sulphonic acid, semicarbazide and formaldehyde

机译：8-羟基喹啉5-磺酸，氨基脲和甲醛衍生的高性能共聚物树脂的热降解研究

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摘要

The present investigation deals with the synthesis and thermal degradation studies of resin 8-Hydroxyquinoline 5- sulphonic acid -semicarbazide - formaldehyde derived by the condensation of 8-Hydroxyquinoline 5-sulphonic acid and semicarbazide with formaldehyde in the presence of 2M acetic acid as catalyst with varying molar proportions of reactants. Copolymer composition has been determined on the basis of their elemental analysis. The copolymer has been characterized by UV-visible, FTIR and 1H NMR spectra. The morphology of synthesized copolymer was studied by scanning electron microscopy (SEM). The thermal decomposition behavior of some new copolymers were studied using thermogravimetric analysis in air atmosphere at heating rate of 10 oC/min. Detailed thermal degradation studies of the resin has been carried out to ascertain its thermal stability. The Freeman– Carroll and Sharp– Wentworth methods have been used to calculate activation energy and thermal stability. Thermal activation energy (Ea) calculated with the help of these methods are in agreement with each other. Thermodynamic parameters such as free energy change (ΔF), entropy change (ΔS), apparent entropy change (S*), and frequency factor (z) are also determined on the basis of the TG curves and by using data of the Freeman–Carroll method. Keywords: Thermal degradation, Resin, Thermal stability, Morphology, Characterization, Poly.
机译：在2M乙酸为催化剂的情况下，由8-羟基喹啉5-磺酸和氨基脲与甲醛缩合而得的树脂8-羟基喹啉5-磺酸-甲醛的合成和热降解研究。反应物摩尔比例的变化。共聚物的组成已根据其元素分析确定。该共聚物已通过紫外可见光谱，FTIR和1H NMR光谱进行了表征。通过扫描电子显微镜（SEM）研究了合成共聚物的形态。在空气中以10 oC / min的升温速率进行热重分析，研究了一些新共聚物的热分解行为。为了确定其热稳定性，已经对树脂进行了详细的热降解研究。 Freeman–Carroll和Sharp–Wentworth方法已用于计算活化能和热稳定性。借助这些方法计算出的热活化能（Ea）彼此一致。热力学参数，例如自由能变化（ΔF），熵变化（ΔS），表观熵变化（S *）和频率因数（z），也根据TG曲线和Freeman–Carroll数据确定方法。关键词：热降解树脂热稳定性形态表征聚

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