RAFT Miniemulsion Polymerization Kinetics, 2 - Molecular Weight Distribution

2009 ◽  
Vol 18 (2) ◽  
pp. 120-126 ◽  
Author(s):  
Hidetaka Tobita
Keyword(s):  
Molecular Weight ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Miniemulsion Polymerization ◽  
Polymerization Kinetics

Mathematical modeling of molecular weight distribution in miniemulsion polymerization with oil‐soluble initiator

AIChE Journal ◽  
2017 ◽  
Vol 63 (6) ◽  
pp. 2128-2140 ◽  
Author(s):  
Claudia A. Capeletto ◽  
Cristiane Costa ◽  
Claudia Sayer ◽  
Pedro H. H. Araújo
Keyword(s):  
Mathematical Modeling ◽  
Molecular Weight ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Miniemulsion Polymerization

Investigation of Ethylene Polymerization Kinetics over Ziegler-Natta Catalysts: Employing Moment Equation Modeling to Study the Effect of Different Active Centers on Homopolymerization Kinetics

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Mehdi Salami-Kalajahi ◽  
Vahid Haddadi-Asl ◽  
Mohammad Najafi ◽  
Sayyed Mehdi Ghafelebashi Zarand
Keyword(s):  
Molecular Weight ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Ethylene Polymerization ◽  
Monomer Concentration ◽  
Moment Equation ◽  
Polymerization Kinetics ◽  
Equation Modeling ◽  
Active Centers ◽  
Olefin Polymerizations

AbstractIn the present work, ethylene polymerization kinetics was modeled using moment equations. According to the results obtained, the molecular weight distribution of each active center follows a Schultz-Flory distribution. However, the molecular weight distribution of polymer produced is much broader than a Schultz- Flory distribution. Besides, the order of polymerization with regard to monomer concentration is higher than unity. Moreover, the catalyst active centers deteriorate in the presence of hydrogen and consequently catalyst yield drops; nevertheless, polymerization kinetics is not mainly affected by hydrogen. Hydrogen also reduces polymer molecular weight since it is a strong transfer agent in olefin polymerizations. Notwithstanding, it does not affect polydispersity index. Last of all, although increasing cocatalyst concentration does not influence the activity of active centers, it lessens the molecular weight as a transfer agent

Synthesis of narrow molecular weight distribution polyvinyl acetate by gamma–rays initiated RAFT/MADIX miniemulsion polymerization

Polymer ◽  
2016 ◽  
Vol 102 ◽  
pp. 183-191 ◽  
Author(s):  
Tania Segura ◽  
Martha Menes-Arzate ◽  
Fernando León ◽  
Alejandra Ortega ◽  
Guillermina Burillo ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Molecular Weight Distribution ◽  
Gamma Rays ◽  
Weight Distribution ◽  
Polyvinyl Acetate ◽  
Miniemulsion Polymerization ◽  
Narrow Molecular Weight Distribution
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