Fabrication of inverse core–shell and Janus-structured microspheres of blends of poly(4-butyltriphenylamine) and poly(methyl methacrylate)

Kikuchi, Shu; Shoji, Ryoka; Yoshida, Saki; Kanehashi, Shinji; Ma, Guanghui; Ogino, Kenji

doi:10.1007/s00396-020-04604-9

Cited by 4 publications

(2 citation statements)

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“…Figure 2a‐b shows that the particles have a typical core‐shell structure and uniform size, with an average particle diameter of approximately 200 nm. The unimodal particle size distribution indicates the complete grafting of the shell monomers onto the surface of the core layer instead undergoing individual polymerization 26 . The T g values of the polysiloxane core layer and P/Si‐ACR were determined from the DSC curves.…”

Section: Resultsmentioning

confidence: 99%

“…The unimodal particle size distribution indicates the complete grafting of the shell monomers onto the surface of the core layer instead undergoing individual polymerization. 26 The T g values of the polysiloxane core layer and P/Si-ACR were determined from the DSC curves. The polysiloxane core layer had a T g of approximately À51 C (Figure 2c).…”

Section: Characterization Of P/si-acr Particlesmentioning

confidence: 99%

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Preparation of multifunctional silicon‐phosphorus acrylate particles for the simultaneous improvement of the flame retardancy and mechanical performance of polylactic acid

Gao

Xiao-ming

2022

J of Applied Polymer Sci

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Polylactic acid (PLA) is a biodegradable plastic that currently has limited application owing to its poor fire resistance and brittleness. Herein, a multifunctional silicon‐phosphorus acrylic resin(P/Si‐ACR) is designed to endow both flame retardancy and toughness to PLA. P/Si‐ACR is prepared by seeded emulsion polymerization with polysiloxane as the core layer and diethyl methylphosphonate acrylate and 9, 10‐dihydro‐9‐oxa‐10‐phosphophenanthrene‐10‐oxide acrylate as the shell materials. P/Si‐ACR has a particle size of approximately 200 nm and glass transition temperatures of −38 and 152°C for the core and shell layers, respectively. Addition of 7 wt% P/Si‐ACR to PLA increases the notched impact strength and elongation at break by 124% and 46%, respectively. This improved mechanical performance is due to the elasticity of silicone rubber and the promotion of crystallization by P/Si‐ACR. Combustion testing revealed that the limiting oxygen index increases from 19.1% to 22.5%, while the peak heat release rate decreases by 36%. This enhanced flame retardancy is due to the synergistic effect of phosphorus and silicon, with the former promoting graphitization and inhibiting the free radical degradation of PLA, and the latter stabilizing the char residue. Therefore, P/Si‐ACR is a promising multifunctional modifier that can achieve an optimal balance among flame retardancy, crystallization performance, and toughness in polymers.

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Section: Resultsmentioning

confidence: 99%

Section: Characterization Of P/si-acr Particlesmentioning

confidence: 99%