A Study of Particle Nucleation in Dispersion Copolymerization of Methyl Methacrylate

Cockburn, Robert A.; McKenna, Timothy F. L.; Hutchinson, Robin A.

doi:10.1002/mren.201100017

Cited by 13 publications

(2 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considering that the polymer particles are spherical in shape and monodisperse, the relationship between monomer conversion ( X w ), average particle diameter ( d ), and the number of particles ( N p ) is given by − where is the initial weight of monomer M j (g).…”

Section: Resultsmentioning

confidence: 99%

Stabilizer-free Dispersion Copolymerization of Styrene and Maleic Anhydride: Mathematical Model for Nucleation

Giudici

2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

This work proposes a new model for particle nucleation, in addition to particle growth, in the process of stabilizer-free dispersion copolymerization of styrene and maleic anhydride in organic solvents. This paper provides the first contribution to the modeling and simulation of the nucleation step in this process. The model considers that (1) polymerization takes place in both the continuous phase and the polymer particles; (2) radicals in the continuous phase that exceed the size J crit precipitate and form aggregates; (3) the coagulation between aggregates forms new particles; (4) the radicals in the continuous phase can also enter into the polymer particles, reducing the nucleation rate; and (5) the termination step inside the particles is diffusion-controlled. The model is able to correctly predict the time evolution of the monomer conversion, particle number, and particle size and was successfully validated against data obtained experimentally and from the literature. Different from the existing models, the proposed model does not require previous information regarding the particle size or number to initialize the model. The radical entry parameter and the radical solubility are important parameters that affect the nucleation step.

show abstract

Section: Resultsmentioning

confidence: 99%

Stabilizer-free Dispersion Copolymerization of Styrene and Maleic Anhydride: Mathematical Model for Nucleation

Giudici

2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…The polymer formed before nucleation is of lower MW as it is generated by polymerization in the continuous phase; after nucleation much of the reaction occurs in the particle phase, leading to higher polymerization rate and production of much higher MW polymer. [20], [21] The final mixture has a bimodal MMD, with the low-MW Table 2).…”

Section: Introducing Functionality To the Ma Based Corementioning

confidence: 99%

The influence of adding functionality to dispersant and particle core compositions in non-aqueous dispersion polymerization

Yang

Hutchinson

2017

Reactive and Functional Polymers

Self Cite

View full text Add to dashboard Cite

Nano-sized polyacrylate colloids (< 200 nm) at high solids level (~ 60 wt%) are prepared via non-aqueous dispersion (NAD) semibatch polymerization using n-butyl methacrylate (BMA)based macromer dispersants of varying chain lengths and levels of functionality provided by incorporation of 2-hydroxyethyl methacrylate (HEMA) comonomer. The effect of building the complexity of the core polymer recipe from methyl acrylate homopolymer to a five-monomer composition is systematically studied. While average particle size increased with the introduction of functional comonomers, the resulting NAD systems remained stable for all core compositions using both BMA macromers and a copolymer macromer containing 5 mol% HEMA. However, introduction of the HEMA functionality to the dispersant at levels of > 5 mol% led to destabilization of the dispersion. The polarity differences between the core compositions and dispersant polymers and the mixed continuous medium, as represented by Hansen solubility parameters, are qualitatively used to interpret the nucleation of particles and the effectiveness of the dispersants.

show abstract

Sustainable Polymers from Biomass‐Derived α‐Methylene‐γ‐Butyrolactones

Gowda

Chen

2013

Encyclopedia of Polymer Science and Technology

View full text Add to dashboard Cite

Sustainable polymers based on the biomass‐derived renewable α‐methylene‐γ‐butyrolactones, including α‐methylene‐γ‐butyrolactone, γ‐methyl‐α‐methylene‐γ‐butyrolactone, and β‐methyl‐α‐methylene‐γ‐butyrolactone, are reviewed. Polymerization methods employed for the synthesis of such polymers are classified into four different categories according to polymerization types or mechanisms: free radical polymerization, coordination polymerization, group‐transfer and anionic polymerization, and zwitterionic polymerization. In addition to synthetic methods, polymer properties, polymerization characteristics, as well as polymerization and stereochemical control mechanisms are also described.

show abstract

A Study of Particle Nucleation in Dispersion Copolymerization of Methyl Methacrylate

Cited by 13 publications

References 46 publications

Stabilizer-free Dispersion Copolymerization of Styrene and Maleic Anhydride: Mathematical Model for Nucleation

Stabilizer-free Dispersion Copolymerization of Styrene and Maleic Anhydride: Mathematical Model for Nucleation

The influence of adding functionality to dispersant and particle core compositions in non-aqueous dispersion polymerization

Sustainable Polymers from Biomass‐Derived α‐Methylene‐γ‐Butyrolactones

Contact Info

Product

Resources

About