Post-polymerization of waterborne alkyd/acrylics. Effect on polymer architecture and particle morphology

Minari, Roque Javier; Goikoetxea, Monika; Beristain, Itxaso; Paulis, Marı́a; Barandiaran, Marı́a J.; Asúa, José M.

doi:10.1016/j.polymer.2009.10.042

Cited by 30 publications

(27 citation statements)

References 17 publications

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“…This strategy of synthesis represents an alternative more environmentally friendly than the bulk/solution process normally used for producing this kind of materials, and enables the synthesis of nanostructured and toughened polystyrenes, with mechanical properties similar to those of a commercial High Impact Polystyrene. Unfortunately, the miniemulsion polymerization of styrene (St) in the presence of PB does not proceed to completion, and a high level of unreacted monomer remains in the produced latex, similarly to that reported for other hybrid latexes synthesized by miniemulsion polymerization …”

Section: Introductionsupporting

confidence: 53%

“…Both post‐polymerization and devolatilization are used to reduce the residual monomer content in polymer latexes. Post‐polymerization is usually preferred because it is carried out in the polymerization reactor, without requiring additional equipment; and consists of adding, after the end of the main polymerization process, fresh initiators to polymerize the residual monomer.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Polystyrene/Polybutadiene Latexes With Low Environmental Impact

Ronco

Minari

Gugliotta

2015

Macro Reaction Engineering

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The polybutadiene incorporation in waterborne polystyrene nanoparticles by miniemulsion polymerization improves the toughness of the final product. Unfortunately, the polymerization does not proceed to completion, remaining a high level of unreacted monomer. This work addresses the implementation of two post‐treatment methods to efficiently remove the residual styrene from polybutadiene/polystyrene latexes with 50% of solid content: i) post‐polymerization with redox initiators; and ii) post‐polymerization by thermal initiation of styrene at high temperature (≥120 °C). The mechanisms responsible of the effects of both post‐treatments on the properties of hybrid materials are here discussed.

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Section: Introductionsupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Hybrid Polystyrene/Polybutadiene Latexes With Low Environmental Impact

Ronco

Minari

Gugliotta

2015

Macro Reaction Engineering

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“…[12] The performance of the composite latex particles is directly affected by their morphology and due to its practical importance, particle morphology has received a considerable attention in the literature. [13][14][15][16][17][18][19][20][21][22][23][24][25][26] Several authors reported theoretical approaches aimed at predicting the particle morphology, but most of the methods are based on two limiting assumptions: either the polymer chains do not move from the point that they are formed [25,[27][28][29][30][31] or the equilibrium morphology is attained instantaneously. [11,[32][33][34][35][36][37][38][39][40] There are only few works in the literature that take into account all relevant kinetic and thermodynamic effects.…”

Section: Introductionmentioning

confidence: 99%

“…24 were solved by means of the Kumar-Ramkrishna method[56][57][58] taking into account the modification of Butte et al[59,60] The details of solving the balances by this method are explained in the Supporting Information.The model was implemented in Matlab using 100 pivots and the computational time in a Laptop…”

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confidence: 99%

A new approach for mathematical modeling of the dynamic development of particle morphology

Hamzehlou

Leiza

Asúa

2016

Chemical Engineering Journal

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Please cite this article as: S. Hamzehlou, J.R. Leiza, J.M. Asua, A new approach for mathematical modelling of the dynamic development of particle morphology, Chemical Engineering Journal (2016), doi: http://dx. AbstractA new model for the dynamic evolution of the morphology of polymer-polymer latex particles has been developed. This model overcomes the limitations of the existing methodologies that were only able to provide the morphology of a single particle, which is only a restricted view of the real system that contains a distribution of particle morphologies. Taking into account the relevant kinetic and thermodynamic effects, the new model calculates the distribution of morphologies for the whole population of polymer particles with less computational effort than that needed by the previous models to calculate the morphology of a single particle. The model was validated by fitting the evolution of particle morphology of composite particles during polymerization of methyl methacrylate on a polystyrene seed. Furthermore, the ability of the model to predict the evolution of the particle morphology for different cases was explored.

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“…RDG can be increased by maintaining the alkyd resin and the acrylic polymer in close vicinity (hydrophobic resins give higher RDG than hydrophilic ones), using initiators that generate radicals active in hydrogen abstraction (e.g., tert-butyl hydroperoxide, TBHP/ascorbic acid, AsAc, which yields oxygen centered radicals and hydrophobic enough to readily enter into the polymer particles) [42], and using monomers of different reactivity with the double bonds of the alkyd resin (e.g., acrylates are more reactive than methacrylates) [31]. Therefore, in order to prepare particles of different morphology, the type of resin, the monomer system and the type of initiator were varied.…”

mentioning

confidence: 99%