Polystyrene(1)/poly(butyl acrylate-methacrylic acid)(2) core-shell emulsion polymers. Part II: Thermomechanical properties of latex films

Hidalgo, Manuel; Cavaillé, J.Y.; Guillot, J.; Guyot, Alain; Pichot, Christian; Ríos, Leonardo; Vassoille, R.

doi:10.1007/bf01095062

Cited by 32 publications

(29 citation statements)

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“…Core/shell particles differing in glass transition temperatures are used in coatings and non-porous homogeneous films [6][7][8], as modifiers of the mechanical properties of thermoplastics [9][10][11][12] and in the manufacture of nanocomposite materials [13,14]. Typically, a two-stage emulsion polymerization process is used to produce core/ shell polymers [3,6,7,11] but also emulsion blending has been employed [15].…”

Section: Introductionmentioning

confidence: 99%

Composition effects on the mechanical properties of microemulsion-made core/shell polymers

Rabelero

López-Cuenca

Puca

et al. 2005

Polymer

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Section: Introductionmentioning

confidence: 99%

Composition effects on the mechanical properties of microemulsion-made core/shell polymers

Rabelero

López-Cuenca

Puca

et al. 2005

Polymer

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“…Dynamic mechanical analysis (DMA) has shown that this thermal treatment results in a considerable reinforcement of mechanical properties (increase of the elastic modulus) (4)(5)(6). For all the films studied, annealing led to a complete loss of the PS-PS correlation peak (Figure 8).…”

Section: Resultsmentioning

confidence: 95%

“…A larger particle diameter and size polydispersity is not a problem since PBuA particles coalesce into a continuous matrix during film formation at room temperature. It has already been observed that the zwitterionic emulsifier dodecyl(mnethyknmioniopropylsulfonate (C 12 H 25 "N(CH 3 )2-(CH 2 )3-S03 ) which was used for emulsion polymerisation (77) did give such a strong scattering at low angles in dry films of homogeneous poly(butylacrylate-co-styrene) (2,5).…”

Section: Methodsmentioning

confidence: 98%

“…A large variety of mechanical properties reinforcements was observed, depending on high T % polymer particles radii, surface chemistry or volume fraction (4)(5)(6). Efficient reinforcement can be achieved when the high T g polymer particles form a continuous percolating network into the low T % polymer matrix.…”

mentioning

confidence: 96%

“…In this latter case, a further structural transformation of the dry films can be obtained by heating the films above the glass transition temperature of the high T g polymer. The weak bonds between solid particles at their points of contact are then strengthened by polymer mterdiffusion (coalescence), which results in a further enhancement of elastic modulus (4)(5)(6).…”

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confidence: 99%

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Small-Angle Neutron Scattering Studies of Composite Latex Film Structure

Chevalier

Hidalgo

Cavaillé

et al. 1996

ACS Symposium Series

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The structure of composite films made of high T g polystyrene (PS) nodules dispersed in a low T g polybutylacrylate (PBuA) matrix was studied by means of small angle neutron scattering. For films cast from mixtures of PS and PBuA latexes, segregation of PS particles leads to dense clusters of PS particles in a PBuA continuous medium. This segregation has the main features of a phase separation. For films cast from two-stage (core-shell) particles, this segregation phenomenon is prevented, depending on the coverage of the PS core by the PBuA shell. Upon annealing the films above the T g of PS, extensive coalescence of PS particles occurred when large contacts were already present in the dry film at room temperature, whereas coalescence could be prevented when PS particles were taken apart by the presence of a PBuA shell. The extent of coalescence had a strong influence on the films mechanical properties.In waterborne coatings applications, polymer films can be obtained by drying polymer particles colloidal suspensions. During the drying process, particles have to approach each other, stick, and finally get deformed from spherical to polyhedral as water evaporates (J-3). Particles made of polymers of low glass transition temperature (T g ) are thus required in such a film formation process but the final (dry) films mechanical properties are poor. A mechanical properties reinforcement can be obtained when solid particles are mixed with the low T % polymer ones. Those solid particles can be either inorganic or organic when a high T g polymer is used. In this latter case, a further structural transformation of the dry films can be obtained by heating the films above the glass transition temperature of the high T g polymer. The weak bonds between solid particles at their points of contact are then strengthened by polymer 4

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Effect of ph on the mechanical properties of functionalized polymers prepared by emulsion polymerization

Mendizábal

Hernández

Puig

et al. 1999

J. Appl. Polym. Sci.

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Polystyrene(1)/poly(butyl acrylate-methacrylic acid)(2) core-shell emulsion polymers. Part II: Thermomechanical properties of latex films

Cited by 32 publications

References 20 publications

Composition effects on the mechanical properties of microemulsion-made core/shell polymers

Composition effects on the mechanical properties of microemulsion-made core/shell polymers

Small-Angle Neutron Scattering Studies of Composite Latex Film Structure

Effect of ph on the mechanical properties of functionalized polymers prepared by emulsion polymerization

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