Structure and mechanical properties of low-density polyethylene/spherical silica nanocomposites prepared by melt mixing: The joint action of silica's size, functionality, and compatibilizer

被引：0

作者：

机构：

[1] Jeziórska, Regina

[2] Świerz-Motysia, Barbara

[3] Zielecka, Maria

[4] Szadkowska, Agnieszka

[5] Studziński, MacIej

来源：

Jeziórska, R. (regina.jeziorska@ichp.pl) | 1600年 / John Wiley and Sons Inc卷 / 125期

关键词：

Low-density polyethylene/spherical silica (LDPE/SGS) nanocomposites; containing; 1; 2; and 6 wt % neat and modified (having amine functional groups) silica nanoparticles; were prepared by melt mixing using a twin-screw corotating extruder. To improve the dispersion degree of the nanoparticles; glicydyl methacrylate grafted ethylene/n-octene copolymer (EOR-g-GMA) containing 0.6 wt % GMA was used as a compatibilizer. It was observed that mechanical properties such as tensile strength; Young's modulus; and impact strength increase and are mainly affected by the loading and size of silica nanoparticles as well as by the EOR-g-GMA. The addition of modified silica and EOR-g-GMA resulted in a further enhancement of mechanical properties due to the improved interfacial adhesion. Storage and loss modulus values of prepared nanocomposites measured by dynamic-mechanical thermal analysis were sensitive to the microstructure of the nanocomposites. Higher storage and loss modulus are evidence that the nanocomposites became stiffer. By adding the modified silica and EOR-g-GMA further increase in storage and loss modulus were observed due to the better dispersion of silica nanoparticles and increased compatibility between silica and the LDPE matrix. Both permitted a much more efficient transfer of stress from the polymer matrix to the silica nanoparticles. The improved barrier properties of all nanocomposites can also be mentioned as a positive effect. Copyright © 2012 Wiley Periodicals; Inc;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Conference article (CA)

引用