Synthesis of Well-Defined Polyolefin Grafted SiO2 Nanoparticles with Molecular Weight and Graft Density Control,ACS Macro Letters

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Synthesis of Well-Defined Polyolefin Grafted SiO2 Nanoparticles with Molecular Weight and Graft Density Control
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-08-18 , DOI: 10.1021/acsmacrolett.0c00398
Tianyu Zhu ₁ , Md Anisur Rahman ₁ , Brian C Benicewicz ₁

Affiliation

Recent advances in surface-initiated polymerization have given rise to a range of brush nanocomposites and hybrid functional materials. However, the synthesis of pure polyolefin-grafted nanocomposites by surface-initiated ring-opening metathesis polymerization (SI-ROMP) is a significant challenge due to the particle aggregation and irreversible particle coupling. This study presents a synthetic approach toward well-defined poly(cyclooctene)- and polyethylene-grafted nanoparticles by tethering Grubbs third generation catalyst on the particle surface and initiating the polymerization in a rapid manner. This work also serves as a template to prepare other hairy nanoparticles and functions as a basis toward understanding their thermomechanical behaviors.

中文翻译：

具有分子量和接枝密度控制的精细聚烯烃接枝SiO2纳米粒子的合成

表面引发聚合的最新进展产生了一系列刷状纳米复合材料和杂化功能材料。然而，由于颗粒聚集和不可逆的颗粒耦合，通过表面引发的开环复分解聚合（SI-ROMP）合成纯聚烯烃接枝纳米复合材料是一项重大挑战。本研究提出了一种合成方法，通过将 Grubbs 第三代催化剂束缚在粒子表面并以快速方式引发聚合，从而获得明确定义的聚（环辛烯）和聚乙烯接枝纳米粒子。这项工作还可以作为制备其他毛状纳米粒子的模板，并作为了解其热机械行为的基础。

更新日期：2020-09-15

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