作者：10. Jiang Gong, Ran Niu, Jie Liu, Xuecheng Chen, Xin Wen, Ewa Mijowska, Zhaoyan Sun, Tao Tang*
关键字：polymer composites, flame retardency
论文来源：期刊
具体来源：RSC Advances
发表时间：2014年

A novel combination of graphene nanosheets (GNSs) with carbon black (CB) was demonstrated to

significantly improve the thermal stability, flame retardancy and mechanical properties of linear low

density polyethylene (LLDPE). The temperature at the maximum weight loss rate of LLDPE under an air

flow was dramatically increased by 94.3
C, and the peak value of the heat release rate of the LLDPE

nanocomposite measured by a cone calorimeter was obviously reduced from 1466 to 297 kW m2 (by

80%). According to the results from rheological tests and structural characterization of residual chars, the

improved thermal stability and flame retardancy of LLDPE were partially attributed to the formation of a

percolated network structure by GNS and CB in the LLDPE matrix, and partially to the accelerated

oxidation crosslinking reaction of LLDPE radicals catalyzed by CB and GNS. More importantly, although

both GNS and CB were commercial and used without any pre-treatments, LLDPE nanocomposites

incorporating both the nanofillers showed much higher mechanical properties compared to neat LLDPE,

especially Young''s moduli which was improved by 219%. This was ascribed to good dispersions of two

nanofillers and strong matrix–nanofiller interfacial interactions