Simultaneously improving the thermal stability, flame retardancy and mechanical properties of polyethylene by the combination of graphene with carbon black
作者：10. Jiang Gong, Ran Niu, Jie Liu, Xuecheng Chen, Xin Wen, Ewa Mijowska, Zhaoyan Sun, Tao Tang*
關鍵字：polymer composites, flame retardency
論文來源：期刊
具體來源：RSC Advances
發(fā)表時間：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