Spherical shape poly(M‐POSS) micro/nano hybrid latex particles: One‐step synthesis and characterization

Abstract

This research introduces for the first time a simple one‐step synthesis method based on emulsion polymerization to obtain spherical shape poly(Methacryl‐Polyoctahedral Silsesquioxanes) “poly(M‐POSS)” micro/nano hybrid latex particles through a free radical mechanism. The polymerization parameters such as the ultrasound source, the amount of surfactant sodium dodecyl sulfate (SDS) and the addition of the cosurfactants SDS/polyvinylpyrrolidone K30 (PVP‐K30), and SDS/polyvinyl alcohol (PVA) in emulsion medium were investigated. The morphological, chemical, thermal, and crystalline properties of poly(M‐POSS), as a function of these parameters, were analyzed by means of scanning electron microscope, Fourier‐transform infrared spectroscopy, thermogravimetric analysis, and X‐ray diffraction, respectively. The ultrasound source was found to have no significant effect on the fınal properties of the particles. However, the addition of a cosurfactant plays a major role in the distribution and coagulation of the latex particles. The addition of PVA as a cosurfactant significantly decreased the coalescence behavior of the latex particles, whereas the addition of PVP‐K30 caused Ostwald ripening effect in over‐micron size particles. As a result, the poly(M‐POSS) micro/nano particles were obtained in spherical shape in the size range between 0.2 and 20 μm. They possess both organic and inorganic parts with thermal resistance up to 400°C, which potentially serve as coating or filler additive materials.

Epoxy Functional Porous POSS Microparticle Synthesis

“…The -C-O-the peak was overlapped with a wide Si-O-Si peak around 1100 cm-1 belonging to the POSS monomer in Figure 3-d. The POSS monomer gave an inorganic part to final copolymer particles as Si-O-Si cage structure, which could be obviously seen at 1100cm-1 peak in Figure 3-c and 3-d [13]. However, this wide Si-O-Si peak at 1100cm-1 partly overlapped the strong -C-O-peak at 1151 cm-1 belonging to GMA and GDMA monomers, so the -C-O-peak cannot be observed in Figure 4-d.…”

“…However, this wide Si-O-Si peak at 1100cm-1 partly overlapped the strong -C-O-peak at 1151 cm-1 belonging to GMA and GDMA monomers, so the -C-O-peak cannot be observed in Figure 4-d. The peak at 1730 cm−1 which indicated -C=O-bonds was associated with the main characteristic of methacrylate structure [13]. CH3-CH2 bonds were appeared as weak stretching vibration in the 2,960-2,890 cm−1 in Figure 4 [13].…”

“…The peak at 1730 cm−1 which indicated -C=O-bonds was associated with the main characteristic of methacrylate structure [13]. CH3-CH2 bonds were appeared as weak stretching vibration in the 2,960-2,890 cm−1 in Figure 4 [13]. The fingerprint region of the final product demonstrated the co-monomer properties of the epoxy ring around 915 cm−1, 830 cm−1, and 527 cm−1in Figure 4-a and Figure 4-d [26].…”

“…The methacrylate base monomers and monomer soluble initiators were generally diffused into swollen poly(GMA) seed particles [25]. However, the M-POSS monomer was created its own micelles forms in emulsion that resulted in the smaller size of particles [13]. Additionally, the high molecular weight of the M-POSS hybrid monomer could create difficulty during the diffusion step into swollen poly(GMA) template particles.…”

“…In our previous work, we managed to obtain the uniform shape POSS latex particles from 200nm to 20µm in size via one-step-emulsion polymerization [13]. However, there was no porosity on these particles for advanced applications.…”