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Journal of Polymer Engineering

Editor-in-Chief: Grizzuti, Nino


IMPACT FACTOR 2017: 0.778

CiteScore 2017: 0.77

SCImago Journal Rank (SJR) 2017: 0.244
Source Normalized Impact per Paper (SNIP) 2017: 0.551

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2191-0340
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Volume 32, Issue 1

Issues

Effect of silica nanoparticle loading and surface modification on the kinetics of RAFT polymerization

Mehdi Salami-Kalajahi
  • Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
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/ Vahid Haddadi-Asl
  • Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
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/ Farid Behboodi-Sadabad
  • Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
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/ Saeid Rahimi-Razin
  • Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
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/ Hossein Roghani-Mamaqani
  • Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
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Abstract

S-(thiobenzoyl)thioglycolic acid was used to synthesize poly(methyl methacrylate) via reversible addition-fragmentation chain transfer (RAFT) polymerization. To study the polymerization kinetics, in situ polymerization reactions were performed with different loading of nanoparticles. To investigate the effect of surface modification on the poly­merization kinetics, similar reactions were performed with 3-methacryloxypropyldimethylchlorosilane-modified nanoparticles. Conversion, reaction rate, molecular weight and polydispersity index (PDI) were monitored during poly­merization. According to results, pseudo-first order kinetics is achieved, but the rate constant of chain transfer reaction to the RAFT agent (Ctr) has a very small value. Adding nanoparticles causes no considerable change in the kinetic curves, while there is an optimum value for nanoparticles loading in which the polymerization rate reaches its maximum level. A similar trend is observed for molecular weight; however, increasing silica content results in an increase in PDI values. In comparison with pristine silica nanoparticles, the polymerization rate increases slowly in the case of modified particles. Also, molecular weight and PDI for free and graft chains are studied separately. The molecular weight of free chains increases with increasing nanoparticles loading up to 7 wt% and then decreases, while PDI values increase continually by adding nanoparticles. However, for graft chains, molecular weight and PDI values increase with increasing nanoparticle content.

Keywords: kinetics; molecular weight; raft polymerization; silica nanoparticles

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Published in Print: 2012-02-01


Citation Information: Journal of Polymer Engineering, Volume 32, Issue 1, Pages 13–22, ISSN (Online) 2191-0340, ISSN (Print) 0334-6447, DOI: https://doi.org/10.1515/polyeng.2011.601.

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Khezrollah Khezri, Mohammad Najafi, and Hossein Roghani-Mamaqani
Journal of Polymer Research, 2017, Volume 24, Number 3
[2]
[3]
Majid Safajou-Jahankhanemlou, Farhang Abbasi, and Mehdi Salami-Kalajahi
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Elaheh Abdollahi, Majid Abdouss, Mehdi Salami-Kalajahi, and Ali Mohammadi
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Bahareh Kariminejad, Mehdi Salami-Kalajahi, Hossein Roghani-Mamaqani, and Akbar Noparvar-Qarebagh
Polymer Composites, 2015, Page n/a
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Shahab Jafarzadeh, Vahid Haddadi-Asl, and Hossein Roghani-Mamaqani
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[8]
Hossein Roghani-Mamaqani, Vahid Haddadi-Asl, Khezrollah Khezri, Mehdi Salami-Kalajahi, Mohammad Najafi, Masoud Sobani, and Seyyed-Ataollah Mirshafiei-Langari
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[9]
Hossein Roghani-Mamaqani, Vahid Haddadi-Asl, Zahra Sobhkhiz, and Maedeh Ghaderi-Ghahfarrokhi
Colloid and Polymer Science, 2015, Volume 293, Number 3, Page 735
[10]
Hossein Roghani-Mamaqani, Vahid Haddadi-Asl, Khezrollah Khezri, Mehdi Salami-Kalajahi, and Mohammad Najafi
Polymer Engineering & Science, 2015, Volume 55, Number 8, Page 1720
[12]
Pourya Panahian, Mehdi Salami-Kalajahi, and Mahdi Salami Hosseini
Industrial & Engineering Chemistry Research, 2014, Volume 53, Number 19, Page 8079
[13]
Hossein Roghani-Mamaqani, Vahid Haddadi-Asl, Khezrollah Khezri, Elnaz Zeinali, and Mehdi Salami-Kalajahi
Journal of Polymer Research, 2014, Volume 21, Number 1
[14]
Mohammadreza Sarsabili, Mehdi Parvini, Mehdi Salami-Kalajahi, and Pejman Ganjeh-Anzabi
Advances in Polymer Technology, 2013, Volume 32, Number 4, Page n/a
[15]
Seyed-Ataollah Mirshafiei-Langari, Vahid Haddadi-Asl, Hossein Roghani-Mamaqani, Masoud Sobani, and Khezrollah Khezri
Polymer Composites, 2013, Volume 34, Number 10, Page 1648
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Masoud Sobani, Vahid Haddadi-Asl, Mehdi Salami-Kalajahi, Hossein Roghani-Mamaqani, Seyed-Ataollah Mirshafiei-Langari, and Khezrollah Khezri
Journal of Sol-Gel Science and Technology, 2013, Volume 66, Number 2, Page 337
[17]
Mohammadreza Sarsabili, Mehdi Parvini, Mehdi Salami-Kalajahi, and Abbas Asfadeh
Iranian Polymer Journal, 2013, Volume 22, Number 3, Page 155
[18]
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Polymer Reviews, 2012, Volume 52, Number 2, Page 142

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