Mechanical properties of low-density polyethylene/nano-magnesium hydroxide composites prepared by an in situ bubble stretching method

作者：Zheng Xiu ting; Wu Da ming^*; Meng Qing yun; Wang Ke jian; Liu Ying; Wan Li; Ren Dong yun

来源：Journal of Polymer Research, 2008, 15(1): 59-65.

DOI：10.1007/s10965-007-9141-7

• in situ bubble stretching (ISBS)
• low-density polyethylene (LDPE)
• nano-magnesium hydroxide (nano-Mg(OH)(2))
• nanocomposite
• nanoparticles dispersion

Low-density polyethylene/nano-magnesium hydroxide (LDPE/nano-Mg(OH)(2)) composites have been prepared by an in situ bubble stretching (ISBS) method and simple shear method. By means of field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM), it was confirmed that the ISBS method leads to a high degree of dispersion of the Mg(OH)(2) nanoparticles in the LDPE matrix. Furthermore, no significant re-aggregation of the nanoparticles was observed after removing the bubbles by means of high-speed grinding. The tensile strengths of nanocomposites prepared by means of the ISBS method were higher than those of materials with the same Mg(OH)(2) loading produced by direct blending/extrusion. The tensile strength of the nanocomposites produced by the ISBS method reached a maximum value at an Mg(OH)(2) content of 15 phr. In contrast, the tensile strength of composites prepared by direct blending/extrusion shows a monotonic decrease with increasing Mg(OH)(2) content. The improvement in mechanical properties of nanocomposites associated with the use of the ISBS method can be attributed to a more homogeneous dispersion of smaller nanoparticles.

• 出版日期2008-2
• 单位北京化工大学