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Title

Optimization of ۱,۳-butadiene monomer coordination polymerization using response surface methodology (RSM)

Year: 1400
COI: JR_POJ-8-2_001
Language: EnglishView: 70
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Authors

Ahmad-Ali Shokri - Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box: ۵۱۳۳۵-۱۹۹۶, Tabriz, Iran
Saeid Talebi - Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box: ۵۱۳۳۵-۱۹۹۶, Tabriz, Iran
Mehdi Salami-Kalajahi - Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box: ۵۱۳۳۵-۱۹۹۶, Tabriz, Iran

Abstract:

Laboratory runs can be minimized via experimental design which yields the optimum and best data regarding the independent parameters. In this research work, response surface methodology (RSM) based on a threelevel central composite design (CCD) was utilized to optimize and evaluate the interactive effects of processing conditions for polymerization of ۱,۳-butadiene (Bd) diene monomer using Ziegler-Natta catalyst. The polybutadiene rubber (PBR) having different cis content and molecular weight was obtained. The catalyst components included neodymium versatate (NdV۳) as catalyst, triethyl aluminum (TEAL) as cocatalyst or activator, and ethylaluminum sesquichloride (EASC) as chloride donor. For the modeling, three independent variables, namely monomer concentration (۸-۲۸ wt%), reaction time (۱.۵-۲.۵ h), and reaction temperature (۴۵-۷۵ºC) at three levels were selected to optimize the dependent variables or responses including monomer conversion, viscosity-average molecular weight and the cis isomer content of the obtained polymer. The interaction between three crucial parameters was studied and modeled. Quadratic models were obtained to relate process conditions to dependent variables. It was observed that the optimal conditions predicted by RSM were consistent with the experimental data. Statistical analysis demonstrated that concentration of the monomer and the time of reaction significantly affected cis content. Moreover, processing conditions to achieve the desired response variables were predicted and experimentally approved. The optimal reaction conditions derived from RSM are monomer concentration = ۱۹ wt%, polymerization time = ۲ hours, and polymerization temperature = ۵۰ºC. Polymerization was carried out at optimum conditions. The appropriate level of dependent variables including ۹۴.۲% monomer conversion, ۱۵۱۸۱۲ g/mol viscosity-average molecular weight and ۹۸.۸% cis content was acquired.

Keywords:

Ziegler-Natta, polybutadiene rubber, Processing conditions, Neodymium versatate, Response surface method

Paper COI Code

This Paper COI Code is JR_POJ-8-2_001. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/1241387/

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If you want to refer to this Paper in your research work, you can simply use the following phrase in the resources section:
Shokri, Ahmad-Ali and Talebi, Saeid and Salami-Kalajahi, Mehdi,1400,Optimization of ۱,۳-butadiene monomer coordination polymerization using response surface methodology (RSM),https://civilica.com/doc/1241387

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  • Neusa MTP, Fernanda MBC, Marcos ASC (۲۰۰۴) Synthesis and characterization ...
  • Friebe L, Nuyken O, Obrecht W (۲۰۰۶) Neodymium-based Ziegler-Natta catalyst ...
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