writer：9. Jiang Gong, Ran Niu, Nana Tian, Xuecheng Chen, Xin Wen, Jie Liu, Zhaoyan Sun, Ewa Mijowska, Tao T
keywords：flame retardancy, mechanical properties, polymer composites
source：期刊
specific source：polymer
Issue time：2014年

The combination of fumed silica (SiO2) with carbon black (CB) for improving

thermal stability, flame retardancy and mechanical properties of linear low density

polyethylene (LLDPE) was investigated. The temperature at the maximum weight

loss rate of LLDPE was dramatically increased by 92 oC, and the peak value of heat

release rate measured by cone calorimeter was significantly reduced by 80.7%. The

improved thermal stability and flame retardancy of LLDPE were partially attributed

to the formation of a percolated network structure in LLDPE matrix, and partially to

the accelerated oxidation crosslinking reaction of LLDPE or other radicals by CB and

SiO2. More importantly, although both SiO2 and CB were used without any

pre-treatment, ternary LLDPE nanocomposites showed much higher mechanical

properties compared to those of neat LLDPE. This was ascribed to good dispersions

of two kinds of nanoparticles and strong matrix-nanoparticle interfacial interactions

with LLDPE matrix.