Preparation of cross-linked poly(methyl methacrylate) microspheres using an asymmetric cross-linker via dispersion polymerization and its application in light diffusers

Zhang, Xuechun; Cao, Yunxia; Jiang, Qin; Zhang, Yuanying; Yang, Wuli

doi:10.1007/s00396-020-04622-7

Cited by 18 publications

(15 citation statements)

References 41 publications

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“…During the seeded emulsion polymerization, EGDMA, together with the asymmetric cross-linker AMA was applied. The introduction of the allyl unit of AMA with comparatively low reaction activity paved the way for the following grafting process [28,29]. The chemical structure of the synthesized ASA particles is shown in Figure 1.…”

Section: Resultsmentioning

confidence: 99%

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Acrylonitrile-Styrene-Acrylate Particles with Different Microstructure for Improving the Toughness of Poly(styrene-co-acrylonitrile) Resin

Zhang

Cao

et al. 2021

Advances in Polymer Technology

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Herein, acrylonitrile-styrene-acrylate copolymer (ASA) particles with different microstructure were synthesized by emulsion polymerization and then used for toughening poly(styrene-co-acrylonitrile) (SAN) resin. The structure of ASA particles was confirmed by FTIR. TEM results demonstrated that the particles with different morphologies of multilobe shape, complete core-shell and dumbbell shape were obtained depending on the cross-linker amount. It was found that the toughening efficiency reached the highest when the ASA particles had complete core-shell structure and the shell composition was close to that of the SAN matrix. It was ascribed to the fact that the complete shell layer and similar shell composition provided sufficient interfacial adhesion and transferred stress to induce larger matrix deformation, so that the notched impact strength increased accordingly. Moreover, the notched impact strength of SAN/ASA blend was improved without significantly sacrificing tensile strength when adding 30 wt% ASA particles with the size of around 400 nm. SEM results of the impact-fractured surfaces revealed that irregular fluctuation and numerous microvoids occurred. It was deduced that the toughening mechanism was attributed to the crazings and cavitation of particles. Therefore, this study paved a way of toughening the resin by adjusting the microstructure of the particles including morphology, composition, and size.

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Section: Resultsmentioning

confidence: 99%

“…The grafting degree (G d ) is the weight ratio of grafted SAN to PBA core. The gel content and grafting degree were calculated as given in Equations ( 1) and (2); A in Equation ( 2) represents the mass fraction of PBA core [27,28].…”

Section: Glass Transition Temperature (T G )mentioning

confidence: 99%

Acrylonitrile-Styrene-Acrylate Particles with Different Microstructure for Improving the Toughness of Poly(styrene-co-acrylonitrile) Resin

Zhang

Cao

et al. 2021

Advances in Polymer Technology

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“…PMPs with a size range of 1-5 μm have gained much attention recently, even compared to the nanosized particles in the areas of paints and coatings, [1] cosmetics, [2] chromatography, [3] catalysis, [4] ion-exchange, [5] colloidal crystals, [6] light diffusers, [7] and polymer composites. [8] In particular, crosslinked PMPs have received much attention due to their solvent resistance, [9] thermal stability, and superior mechanical properties.…”

Section: Doi: 101002/macp202100493mentioning

confidence: 99%

“…They must be able to be made in sufficient volumes to be commercial, whilst at the same time using methodologies and new synthetic pathways that can minimize the environmental footprint during their production of Polymer microparticles (PMPs) are solid particles or particulate dispersions of polymers whose size ranges from 1 to 1000 µm. PMPs with a size range of 1–5 µm have gained much attention recently, even compared to the nanosized particles in the areas of paints and coatings, [ 1 ] cosmetics, [ 2 ] chromatography, [ 3 ] catalysis, [ 4 ] ion‐exchange, [ 5 ] colloidal crystals, [ 6 ] light diffusers, [ 7 ] and polymer composites. [ 8 ] In particular, crosslinked PMPs have received much attention due to their solvent resistance, [ 9 ] thermal stability, and superior mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Light‐Stimulated Synthesis of Cross‐Linked Polymer Microparticles

Boga

Patti

Warner

et al. 2022

Macro Chemistry & Physics

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The increasing demand for crosslinked polymer microparticles (PMPs) in advanced applications requires the development of new sustainable methods which can reduce the impact of the polymerization process on the environment. This research reports a new environmentally-friendly light-assisted polymerization method for the synthesis of highly cross-linked polymer microspheres by combining light-induced [2+2] cycloadditions with dispersion polymerization. Using naturally-occurring coumarin as reactive moieties, this method allows the synthesis of highly crosslinked PMPs in the presence of UV light at room temperature without initiator. The effect of the reaction parameters such as monomer concentration, stabilizer and reaction time on the particle size and yield are investigated using a number of techniques including Fourier transform infrared spectroscopy, solid-state 13 C nuclear magnetic resonance spectroscopy, and scanning electron microscopy. The results show the formation of highly crosslinked porous microspheres which demonstrate good thermal stability.

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“…[ 13 ] Guo et al prepared strawberry‐like PMMA/SiO 2 composite microspheres to achieve high transmittance of 94.6% and haze of 84.2% by mimicking the compound eyes of insects. [ 14 ] Similarly, polymethyl methacrylate (PMMA) microspheres, [ 15 ] double‐shell‐layered nanoparticles, [ 16 ] ethylene‐vinyl acetate copolymers, [ 17 ] and spindle‐shaped core‐shell particles [ 18 ] were proposed to fabricate highly scattering films. In general, optical diffusers based on particle doping are cost effective and easily scalable, which have also been utilized widely in numerous application areas.…”

Section: Introductionmentioning

confidence: 99%

High‐Transmittance and High‐Haze Composite Particle‐Free Optical Diffusers Enabled by Polymerization‐Induced Phase Separation

Liang

Huang

et al. 2021

Advanced Photonics Research

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Optical diffusers with combined high transmittance and high haze are desired for the light management of various optoelectronic devices. However, the fabrication of such optical diffusers is still a grand challenge, limiting the wide application of optical diffusers. Herein, a technique by combining polymerization‐induced phase separation (PIPS) and postpolymer encapsulation to make composite particle‐free optical diffusers is proposed, achieving combined high transmittance and high haze. By altering the composition of two porogens, the morphology of the porous structure can be well tailored, which generates different scattering modes. Furthermore, the transmittance and haze spectra can be tuned by varying the diffuser thickness. At an optimized form, a composite optical diffuser is capable of achieving superhigh haze (88%), while maintaining a high degree of transparency (88%). Finally, the optical diffusers are applied to phosphor‐converted light‐emitting diodes for color uniformity enhancement and quantum dot films for photoluminescence intensity improvement. The present technique provides a facile, low‐cost, and easily scalable route for making optical diffusers with high transmittance and haze, which may facilitate their real‐world application.

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Preparation of cross-linked poly(methyl methacrylate) microspheres using an asymmetric cross-linker via dispersion polymerization and its application in light diffusers

Cited by 18 publications

References 41 publications

Acrylonitrile-Styrene-Acrylate Particles with Different Microstructure for Improving the Toughness of Poly(styrene-co-acrylonitrile) Resin

Acrylonitrile-Styrene-Acrylate Particles with Different Microstructure for Improving the Toughness of Poly(styrene-co-acrylonitrile) Resin

Sustainable Light‐Stimulated Synthesis of Cross‐Linked Polymer Microparticles

High‐Transmittance and High‐Haze Composite Particle‐Free Optical Diffusers Enabled by Polymerization‐Induced Phase Separation

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