Effect of MCM-41 nanoparticles on ARGET ATRP of styrene: Investigating thermal properties. (May 2015)

• Record Type: Journal Article
• Authors: Khezri, Khezrollah; Roghani-Mamaqani, Hossein
• Is Part Of: Journal of composite materials. Volume 49:Number 12(2015)
• Page Start: 1525
• Page End: 1535
• Publication Date: 2015-05
• Subjects: MCM-41 nanoparticle -- polystyrene -- nanocomposite -- activators regenerated by electron transfer for atom transfer radical polymerization; Composite materials -- Periodicals; Composites -- Périodiques; 620.118
• DOI: 10.1177/0021998314535961
• Languages: English
• ISSNs: 0021-9983

Abstract

A newly developed initiation technique, activators regenerated by electron transfer, was successfully employed to synthesize MCM-41/ polystyrene nanocomposites by in situ atom transfer radical polymerization. Hexagonal structure, surface area, and morphological study of the synthesized MCM-41 nanoparticles were performed by using powder X-ray diffraction, nitrogen adsorption/desorption isotherm, scanning electron microscopy, and transmission electron microscopy respectively. Conversion and molecular weight evaluation was carried out using gas chromatography and size exclusion chromatography respectively. Remarkable decrease of conversion from 69% to 43% was observed by the addition of only 3 wt% MCM-41 nanoparticles. However, polydispersity index increases from 1.14 to 1.41. Increasing of thermal stabilities and also reduction of Tg by increasing MCM-41 nanoparticles loading were comprehended according to the results of thermogravimetric analysis and differential scanning calorimetry, respectively.