Kinetics of methyl methacrylate polymerization initiated with <i>n,n</i>′‐bis[(4‐<i>t</i>‐butylazo‐4‐cyanovaleryl)‐oxyethyl]‐azo‐bis‐formamide

Simionescu, C. I.; Comǎniǎ, Eugenia; Pastravanu, M.; Popa, Aura Angelica

doi:10.1002/pi.1990.4980230402

Cited by 5 publications

(1 citation statement)

References 4 publications

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“…Bifunctional initiator is very useful in obtaining high initiation rates, and high polymer molecular weights [Simionescu et al, 1990].…”

Section: *7 O Ptim Al C Ontrol Of M M a Polym Erization In N Onisotherm Al B Atch R Eactor W Ith B Ifunctional Initia Tormentioning

confidence: 99%

Optimal Control of Non-Isothermal, Batch Polymerization of Methacrylates with Specified Time, Monomer Conversion, and Average Molecular Weights

Sundaram¹

2021

Preprint

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Optimal control policies are determined for the free radical polymerization of three different polymerization processes, in a non-isothermal batch reactor as follows: (1) bulk polymerization of n-butyl methacrylate; (2) solution polymerization of methyl methacrylate with monofunctional initiator; (3) solution polymerization of methyl methacrylate with bifunctional initiator. Four different optimal control objectives are realized for the above three processes. The objectives are: (i) maximization of monomer conversion in a specified operation time, (ii) minimization of operation time for a specified, final monomer conversation, (iii) maximization of monomer conversion for a specified, final number average polymer molecular weight, and (iv) maximization of monomer conversion for a specified, final weight average polymer molecular weight. The realization of these objectives is expected to be very useful for the batch production of polymers. To realize the above four different optimal control objectives, a genetic algorithms-based optimal control method is applied, and the temperature of heat exchange fluid inside reactor jacket is used as a control function. Necessary equations are provided in the above three processes to suitably transform the process model in the range of a specified variable other than time, and to evaluate the elements of Jacobian to help in the accurate solution of the process model. The results of this optimal control application reveal considerable improvements in the performance of the batch polymerization processes.

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“…Bifunctional initiator is very useful in obtaining high initiation rates, and high polymer molecular weights [Simionescu et al, 1990].…”

Section: *7 O Ptim Al C Ontrol Of M M a Polym Erization In N Onisotherm Al B Atch R Eactor W Ith B Ifunctional Initia Tormentioning

confidence: 99%

Optimal Control of Non-Isothermal, Batch Polymerization of Methacrylates with Specified Time, Monomer Conversion, and Average Molecular Weights

Sundaram¹

2021

Preprint

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Synthesis of block copolymers by radical polymerization and telomerization

Améduri

Boutevin

Gramain

Advances in Polymer Science

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The synthesis of block copolymers, cooligomers or cotelomers performed from radical polymerization and radical telomerization is discussed. In the first part, the two main methods proposed for obtaining block copolymers by radical polymerization are reviewed. The first method concerns the use of multifunctional micro-or macroinitiators that decompose according to two processes or at two different temperatures, allowing the stepwise insertion of different base units. The second method, more recently proposed, tends to control the reactivity of the growing radicals by the use of either additional stable free radicals or organometallic compounds acting as counter radical, allowing reversible termination steps. These methods still in full development and often referred to as "living" processes, allow well defined block copolymers with narrow molecular weight distributions to be produced. The second part of the review deals with methods of preparation by radical telomerization. Besides the traditional process involving the coupling of co-functional oligomers or telomers and the bistelomerization, the dormant or living telomerization methods are also described. In this last case, the "living" character is achieved by the use of well-chosen transfer agents with specific cleavable bonds leading to reversibility of the termination step.

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Optimal control determination of MMA polymerization in non-isothermal batch reactor using bifunctional initiator

Upreti

Sundaram

Lohi

2005

European Polymer Journal

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Kinetics of methyl methacrylate polymerization initiated with n,n′‐bis[(4‐t‐butylazo‐4‐cyanovaleryl)‐oxyethyl]‐azo‐bis‐formamide

Cited by 5 publications

References 4 publications

Optimal Control of Non-Isothermal, Batch Polymerization of Methacrylates with Specified Time, Monomer Conversion, and Average Molecular Weights

Optimal Control of Non-Isothermal, Batch Polymerization of Methacrylates with Specified Time, Monomer Conversion, and Average Molecular Weights

Synthesis of block copolymers by radical polymerization and telomerization

Optimal control determination of MMA polymerization in non-isothermal batch reactor using bifunctional initiator

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