EFFECT OF MCM-41 NANOPARTICLES ON THE KINETICS OF FREE RADICAL AND RAFT POLYMERIZATION OF STYRENE

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SARSABILI MOHAMMADREZA; PARVINI MEHDI; SALAMI KALAJAHI MEHDI; ASFADEH ABBAS

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Journal: Iranian Polymer Journal Year:2013 | Volume:22 | Issue:3 Page(s): 155-163

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Title

EFFECT OF MCM-41 NANOPARTICLES ON THE KINETICS OF FREE RADICAL AND RAFT POLYMERIZATION OF STYRENE

Author(s)

SARSABILI MOHAMMADREZA | PARVINI MEHDI | SALAMI KALAJAHI MEHDI | ASFADEH ABBAS | Issue Writer Certificate

Keywords

MCM-41

NANOCOMPOSITE

KINETICS

REVERSIBLE ADDITION FRAGMENTATION CHAIN TRANSFER (RAFT) POLYMERIZATION

MOLECULAR WEIGHT DISTRIBUTION (MWD)

DIFFERENTIAL SCANNING CALORIMETRY (DSC)

Abstract

To examine the effect of mobil composition of matter 41 (MCM-41) nanoparticles on the KINETICS of free radical and 2-(dodecylthiocarbonothioylthio)-2-methylpropionic acid (DDMAT)-mediated reversible addition fragmentation chain transfer (RAFT) polymerization, the polymerization reaction using various amounts of as-synthesized MCM-41 were performed. To study the reaction KINETICS, conversion, molecular weight and polydispersity index (PDI) were obtained during the polymerization. Also, differential scanning calorimetry (DSC) was used to determine the glass transition temperature (T g) values of samples. According to the results, in free radical polymerization, conversion was increased by adding nanoparticles but the reverse trend was observed in RAFT polymerization. The same results were obtained for molecular weight values. In free radical polymerization, increasing the MCM-41 content led to higher PDI value, while in RAFT polymerization it did not appreciably affect the PDI value. In RAFT polymerization, no induction time was observed which indicates that DDMAT is an appropriate RAFT agent for styrene polymerization. Also in free radical polymerization, the addition of MCM-41 particles reduced T g values in comparison to neat PS. On the other hand, there was an increase in T g value up to 5 wt% of MCM-41 loading and a drastic reduction was observed in 7 wt% MCM-41 loading in the RAFT polymerization. Finally, the T g values of NANOCOMPOSITEs produced by RAFT method were higher than those in the NANOCOMPOSITEs synthesized using the free radical method.

Cites

SYNTHESIS AND CHARACTERIZATION OF SUNFLOWER OIL-BASED POLYSULFIDE POLYMER/CLOISITE 30B NANOCOMPOSITES

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APA: Copy

SARSABILI, MOHAMMADREZA, PARVINI, MEHDI, SALAMI KALAJAHI, MEHDI, & ASFADEH, ABBAS. (2013). EFFECT OF MCM-41 NANOPARTICLES ON THE KINETICS OF FREE RADICAL AND RAFT POLYMERIZATION OF STYRENE. IRANIAN POLYMER JOURNAL (ENGLISH), 22(3), 155-163. SID. https://sid.ir/paper/646095/en

Vancouver: Copy

SARSABILI MOHAMMADREZA, PARVINI MEHDI, SALAMI KALAJAHI MEHDI, ASFADEH ABBAS. EFFECT OF MCM-41 NANOPARTICLES ON THE KINETICS OF FREE RADICAL AND RAFT POLYMERIZATION OF STYRENE. IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2013;22(3):155-163. Available from: https://sid.ir/paper/646095/en

IEEE: Copy

MOHAMMADREZA SARSABILI, MEHDI PARVINI, MEHDI SALAMI KALAJAHI, and ABBAS ASFADEH, “EFFECT OF MCM-41 NANOPARTICLES ON THE KINETICS OF FREE RADICAL AND RAFT POLYMERIZATION OF STYRENE,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 22, no. 3, pp. 155–163, 2013, [Online]. Available: https://sid.ir/paper/646095/en

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