Si-H Surface Groups Inhibit Methacrylic Polymerization: Thermal Hydrosilylation of Allyl Methacrylate with Silicon Nanoparticles

被引：3

作者：

Golvari, Pooria ^{[1
]}

Alkameh, Khaled ^{[1
]}

Kuebler, Stephen M. ^{[2
,3
]}

机构：

[1] Univ Cent Florida, Dept Chem, Orlando, FL 32816 USA

[2] Univ Cent Florida, Dept Chem, CREOL, Coll Opt & Photon, Orlando, FL 32816 USA

[3] Univ Cent Florida, Dept Mat Sci & Engn, Orlando, FL 32816 USA

来源：

LANGMUIR | 2022年 / 38卷 / 27期

关键词：

EXCITON-MEDIATED HYDROSILYLATION; METHYL-METHACRYLATE; BLUE PHOTOLUMINESCENCE; DANGLING BONDS; ACRYLIC-ACID; FUNCTIONALIZATION; NANOCRYSTALS; MONOLAYER; ALKYL; MECHANISM;

D O I：

10.1021/acs.langmuir.2c00891

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Hydrogen-terminated silicon nanoparticles (H-SiNPs) inhibit anerobic thermal autopolymerization of methacrylates. When heated to 100 degrees C under an inert atmosphere, allyl methacrylate (AMA) was stable for at least 95 h in the presence of 1.2 wt % H-SiNPs, exhibiting less than 0.15% conversion, whereas the neat monomer solidified within 24 h (over 10% conversion after 34 h). A mechanism is proposed that is based on H-transfer from SiNPs to the thermally activated methacrylic dimer biradical, quenching autopolymerization. An analysis of SiNPs isolated after heating in AMA reveals the grafting of ester groups. Thermal hydrosilylation offers a facile way to attach an allyl group to the surface of SiNPs.

引用

页码：8366 / 8373

页数：8

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