Synthesis, characterization and thermal degradation kinetics of poly(3-acetylcoumarin-7-yl-methacrylate) and its organoclay nanocomposites

Journal of Engineering Research

Adnan Kurt¹ 

[1] Adiyaman University

关键词: Synthesis;    characterization;    coumarin derived polymer/clay nanocomposite;    thermal decomposition kinetics;    activation energy;    reaction mechanism.;   

DOI  :  

学科分类：社会科学、人文和艺术（综合）

来源: Kuwait University * Academic Publication Council

【 摘 要 】

A new coumarin derived polymer poly(3-acetylcoumarin-7-yl-methacrylate), poly(ACMA), and its nanocomposites with different contents of organoclay were synthesized and characterized with FTIR and1 H-NMR. The X-ray diffraction analysis showed that the clay dispersion in the polymer matrix was exfoliated behavior. The influence of the organoclay content on the thermal stabilities of nanomaterials was studied by means of thermogravimetric analysis (TGA). Thermal stabilities of nanocomposites were increased about 29-38 °C by loading clay into the polymer matrix. The nanocomposite containing 4 wt% organoclay showed the best thermal stability (319 °C) at 10% weight loss. Thermal decomposition kinetic analysis of nanocomposites was investigated by Kissinger and Coats-Redfern methods. Introduction of the clay phase into homopolymer increased the activation energy from 185.39 kJ/mol to 264.30 kJ/mol. The actual reaction mechanism of pure poly(ACMA)  and its organoclay nanocomposites obeyed deceleration type dimensional diffusion mechanisms (D n ).   

【 授权许可】

Unknown