纳米颗粒聚合物涂层：链转移聚合中分子量和涂层厚度的关系

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer Chemistry Pub Date : 2025-03-18 DOI:10.1039/D5PY00081E

Daniel Döpping, Andreas Stihl, Dominik Voll, Felix H. Schacher and Patrick Théato

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引用次数: 0

摘要

采用链转移聚合法制备了不同反应活性单体的聚甲基丙烯酸甲酯（PMMA）和聚丙烯腈（PAN）包覆二氧化硅纳米颗粒，研究了不同反应活性单体包覆二氧化硅纳米颗粒的性能。通过热重分析（TGA）、能量色散x射线光谱（EDXS）、透射电镜（TEM）对颗粒进行了表征，并与粗反应混合物中形成的游离PMMA/PAN进行了相关性分析，并用粒径排除色谱（SEC）对其进行了表征。结果表明，热重分析仪测得的质量损失和透射电镜测得的涂层厚度与粗反应混合物中聚合物的平均链长密切相关。

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Revisiting polymer coatings on nanoparticles: correlation between molecular weight and coating thickness in chain transfer polymerizations†

Various poly(methyl methacrylate) (PMMA) and poly(acrylonitrile) (PAN) coated silica nanoparticles were synthesized via chain transfer polymerization with the goal to assess the coating behavior and characterization of polymer coated silica nanoparticles with monomers of different reactivities. The particles were characterized by TGA, EDXS, TEM and correlated to the free PMMA/PAN formed in the crude reaction mixture characterized with SEC. It was found that the mass loss observed in TGA and coating thickness obtained from TEM micrographs correlate strongly with the average polymer chain-length in the crude reaction mixture.

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来源期刊

Polymer Chemistry POLYMER SCIENCE-

CiteScore

8.60

自引率

8.70%

发文量

535

审稿时长

1.7 months

期刊介绍： Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.