Facile preparation of isocyanate-functionalized poly(styrene-co-maleimide-co-maleic anhydride) particle and its application as a versatile support for nano-sized TiO2 photocatalyst

Yang, Liying; Wu, Yingxue; Shu, Hongyi; Wang, Chuang; Song, Chunfeng; Zhang, Xianhong; Chen, Dong; Ma, Yuhong; Yang, Wantai

doi:10.1016/j.apsusc.2023.157536

Cited by 1 publication

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“…The 2SP process is commonly applied for the alternating copolymerization of electron-rich and electron-deficient monomer pairs. The monomer concentration of the 2SP system can be as high as 40%, and the monomer conversion can reach nearly 100% in 6 h. − Monodisperse microspheres with regular morphology, controlled size, and high density of functional groups are facilely and efficiently obtained by simple centrifugation or filtration. What’s more, the separated solvent containing residual monomers can be directly reused to reduce environmental pollution, which makes the 2SP process suitable for large-scale industrial production.…”

Section: Introductionmentioning

confidence: 99%

Facile and High-Yield Synthesis of Monodisperse and Heat-Resistant Polymaleimide Microspheres by Self-Stabilized Precipitation Polymerization

Yang,

Shu,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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In recent years, monodisperse functional polymer particles have attracted intensive attention due to their promising prospects in numerous application fields. Herein, monodisperse polymaleimide (PMI) microspheres with excellent thermal stability and a high glass transition temperature were facilely prepared by self-stabilized precipitation polymerization (2SP) of maleimide. The effects of the reaction medium, monomer and initiator concentrations, reaction temperature, and cross-linker dosage on the size and morphology of the as-prepared PMI microspheres were systematically investigated. By simply adjusting the monomer and initiator concentration and reaction temperature, monodisperse spherical PMI microspheres were successfully obtained in high yield (close to 100%) in ethyl acetate with tunable diameters of 0.24−1.08 μm. To elucidate the nucleation, stabilization, and growth mechanism, the size, surface morphology, and molecular weight of the as-prepared PMI microspheres were monitored over the polymerization process. As expected, the particle growth was mainly attributed to the continuous deposition of newly formed PMI chains onto the surface of the PMI nuclei, which is in good agreement with the traditional 2SP process. Furthermore, the intermolecular hydrogen-bonding interactions between imide and carbonyl groups might also exert an important influence on the stabilization and growth of the PMI particles, which were verified by the 2SP polymerization of MI in the presence of urea and succinimide.

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Section: Introductionmentioning

confidence: 99%