Study On The Interfacial Interaction And Mechanism Between Multi-walled Carbon Nanotubes And General Rubber

Carbon nanotubes (CNTs) have been considered as an ideal reinforcing filler for preparing rubber composites because of its unique structure and excellent electrical, mechanical and chemical performances. At the same time,there are many researchers focusing on the interfacial interaction between general rubber and CNTs because of it is considered to be an ideal reinforcing filler, but there has not been a unified conclusion. Therefore, in order to study the interfacial interaction and mechanism between CNTs and rubber, on the macro, the content of bound rubber (BR) and tight BR (TBR) were used to evaluate the interfacial interaction between CNTs and general rubber, on the micro, the interfacial interaction mechanism were explained by XPS, GPC,LFS-NMR, SEM, Raman spectroscope. Therefore, the following aspects have been studied:(1) The influence of storage conditions (storage time and storage temperature) of the mixing compound rubber on the content of the BR and TBR were studied in detailed. Results are as follows: ? the content of BR and TBR increased with the increase of the storage time of gross rubber when stored at the same temperature, which trends is stable after storage four weeks.? The content of BR and TBR increased sharply with the increase of the storage temperature of the mixing compound when stored at the same time.What is more, this growth rate is difficult for the gross rubber when stored at the room temperature for a long time, which will greatly strengthen the interfacial interaction between CNTs and general rubber.(2) The influence of structure of general rubber and the phr of CNTs on the content of BR and TBR were studied in comprehensive. Results are as follows: ? The content of BR and TBR of SSBR modified by hydroxyl group has higher than that of unmodified SSBR.? The content of BR of nonoil-filled SSBR has higher than that of oil-filled SSBR.? The content of BR of EPDM has higher than that of EPM because of the existence of third monomers.(3) The interfacial interaction between the different structure of cis-type rubber and CNTs were studied. It is obviously that the content of BR and TBR of NR was much higher than that of the other synthetic cis-type rubber, which is proved that the interfacial interaction between CNTs and NR is stronger. We further study found that the non-rubber components of lipids of NR were play a key role in the interfacial interaction of CNTs/NR composites.(4) The influence of the different structure of hydrogenated nitrile rubber(the content of CN-, saturation, the functionalized of carboxyl) and storage conditions (storage time and storage temperature) of the mixing compound on the content of the BR and TBR were studied in detailed. Results are as follows:? For the H-NBR (saturation: 96%) and NBR rubber, the content of BR and TBR increased with the increase of the acrylonitrile content.?The content of BR of hydrogenated NBR was higher than that of NBR while the content of TBR was less than NBR when the same content of acrylonitrile. ? What is more, the content of BR and TBR was significantly increased when NBR was functionalized with carboxyl group (4 wt %).