Preparation of the stable core–shell latex particles containing organic-siloxane in the shell

Liu, Bai Ling; Zhang, Bao Tan; Cao, Shunsheng; Deng, Xiao; Hou, Xiaohui; Chen, Hualin

doi:10.1016/j.porgcoat.2007.08.008

Cited by 39 publications

(6 citation statements)

References 22 publications

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“…The core and shell regions were efficiently distinguished as white and grey areas, respectively. The core-shell structure of particles with a polyacrylate core (the white part) and a polydimethoxysilane shell (the dark circle) was successfully confirmed with TEM using a phosphotungstic acid solution as a staining agent [69]. It was possible to estimate the thickness of shell using TEM pictures to show the polymer particle.…”

Section: Protein Adsorption Investigationsmentioning

confidence: 73%

Characterization methods of polymer core–shell particles

Gosecka

Gosecki

2015

Colloid Polym Sci

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The design and synthesis of various polymer coreshell particles result from their distinct characteristics, which combine the properties of two or more components into one material. Many accessible synthetic strategies for obtaining polymer core-shell particles lead to the formation of particles for which the internal morphology differs from the ideal coreshell structure. Understanding the precise morphology characteristics is important for mechanistic studies of particle formation, which ultimately results in the design of particles for specific structures and properties. The detailed characteristics of complex polymer particle structures are complicated and require more than one method. This review focuses on imaging methods such as transmission electron microscopy (TEM), cryo-TEM, scanning transmission electron microscopy (STEM) and confocal fluorescence microscopy that reveal the radial redistribution of the components and methods for the quantitative analysis of individual phases (core, shell and interfacial layer), such as small-angle X-ray scattering (SAXS), small-angle neutron scattering (SANS), differential scanning calorimetry (DSC) and nuclear magnetic resonance (NMR). Methods that can determine the surface composition and makeup of the character of interfacial layer (gradient or containing small domains, etc.) were also reviewed.

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Section: Protein Adsorption Investigationsmentioning

confidence: 73%

Characterization methods of polymer core–shell particles

Gosecka

Gosecki

2015

Colloid Polym Sci

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“…The main decomposition step occurred at 350-450 °C, and the maximum thermal decomposition rate of SMI was in the order of N-ethyl SMI (445 °C) > N-methyl SMI (433 °C) > NH 3 -SMI (421 °C), which was significantly higher than SMA (390 °C) and the other polymeric microspheres. 51,52 All of these microspheres showed a plateau level after the main decomposition step, which is attributed to the charring processes. 53 The microspheres showed the third step of thermal decomposition over 520 °C, and all of the char residuals of SMI and SMA were totally gasified through oxidation at temperatures above 600 °C.…”

Section: Imidization Of the Smaa Microspheresmentioning

confidence: 97%

Solvent-free preparation of uniform styrene/maleimide copolymer microspheres from solid poly(styrene-alt-maleic anhydride) microspheres

Chen

Zhai

et al. 2022

Polym. Chem.

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“…Therefore, shell regions with higher electron cloud density were observed to be darker. The core-shell structure of WPUA was further characterized through comparing the surface elemental composition of WPUA and acryl-free WPU particles through XPS [31][32][33]. Here, WPU consists only of PU components in WPUA.…”

Section: Characterization Of Core-shell Structurementioning

confidence: 99%

“…The storage modulus of WPUA_H0.00 at −70 °C was 2480 MPa, which increased to 5020 MPa at the same temperature. As the temperature increased, the molecular chain The core-shell structure of WPUA was further characterized through comparing the surface elemental composition of WPUA and acryl-free WPU particles through XPS [31][32][33].…”

Section: Viscoelastic and Thermal Characterization Of Wpua Filmsmentioning

confidence: 99%

Effects of Grafting Degree on the Formation of Waterborne Polyurethane-Acrylate Film with Hard Core–Soft Shell Structure

Kwon,

Moon,

Kim

et al. 2023

Polymers

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Waterborne polyurethane-acrylate (WPUA) grafted with polyurethane was prepared to improve the film-forming ability of hard-type acrylic latex. To balance the film-formation ability and hardness, the WPUA latex was designed with a hard core (polyacrylate) and soft shell (polyurethane). The grafting ratio was controlled through varying the content of 2-hydroxyethyl methacrylate (HEMA) used to cap the ends of the polyurethane prepolymer. The morphologies of the latex particles, film surface, and fracture surface of the film were characterized through transmission electron microscopy, atomic force microscopy, and scanning electron microscopy, respectively. An increase in the grafting ratio resulted in the enhanced miscibility of polyurethane and polyacrylate but reduced adhesion between particles and increased minimum film formation temperature. In addition, grafting was essential to obtain transparent WPUA films. Excessive grafting induced defects such as micropores within the film, leading to the decreased hardness and adhesive strength of the film. The optimal HEMA content for the preparation of a WPUA coating with excellent film-forming ability and high hardness in ambient conditions was noted to be 50%. The final WPUA film was prepared without coalescence agents that generate volatile organic compounds.

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Preparation of the stable core–shell latex particles containing organic-siloxane in the shell

Cited by 39 publications

References 22 publications

Characterization methods of polymer core–shell particles

Characterization methods of polymer core–shell particles

Solvent-free preparation of uniform styrene/maleimide copolymer microspheres from solid poly(styrene-alt-maleic anhydride) microspheres

Effects of Grafting Degree on the Formation of Waterborne Polyurethane-Acrylate Film with Hard Core–Soft Shell Structure

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