Characterization of Diatomite Platelets and Its Application for In Situ Atom Transfer Radical Random Copolymerization of Styrene and Butyl Acrylate: Normal Approach

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• 作者：Khezrollah Khezri ; Yousef Fazli
• 关键词：Mesoporous diatomite platelets ; Nanocomposite ; Poly(styrene ; co ; butyl acrylate) ; In situ ATRP
• 刊名：Journal of Inorganic and Organometallic Polymers and Materials
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：27
• 期：1
• 页码：266-274
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Inorganic Chemistry; Organic Chemistry; Polymer Sciences;
• 出版者：Springer US
• ISSN：1574-1451
• 卷排序：27

文摘

Pristine mesoporous diatomite platelets were employed to prepare poly(styrene-co-butyl acrylate)/diatomite composites. Diatomite platelets were used for in situ copolymerization of styrene and butyl acrylate by ATRP to synthesize tailor-made poly(styrene-co-butyl acrylate) nanocomposites. XRF analysis, FTIR spectroscopy, TGA, nitrogen adsorption/desorption isotherm, SEM, and TEM were employed for evaluating inherent properties of pristine diatomite nanoplatelets. Conversion and molecular weight determinations were performed using GC and SEC respectively. Addition of 3 wt% pristine mesoporous diatomite platelets leads to increase of conversion from 65 to 78%. Molecular weight of copolymer chains increases from 15,500 to 19,000 by addition of 3 wt% pristine mesoporous diatomite; however, dispersity increases from 1.1 to 1.4. Copolymers composition was evaluated using 1H NMR spectroscopy. Increasing thermal stability of the nanocomposites is demonstrated by TGA. DSC shows an increase in glass transition temperature from 34.6 to 38.8 °C by adding 3 wt% of mesoporous diatomite platelets.