Crystallization and mechanical properties of carbon nanotube/continuous carbon fiber/metallocene polypropylene composites

Abstract In this work, a high fluidity polypropylene prepared with the metallocene catalyst (mPP) was used as matrix, carbon nanotube (CNT) and continuous fiber (CCF) were added to prepare composites, their mechanical properties, melting crystallization behavior investigated. effects of tension force in preparation process compatibilizer maleic anhydride grafted (MAPP) on tensile strength composites researched. The results show that increases first then decreases increase tractive force. addition, behaviors dynamic mPP, CNT/mPP CNT/CCF/mPP characterized studied by differential scanning calorimetry (DSC) analyzer (DMA). point ( T m ), temperature c ) storage modulus E ′) are all increased adding 1 wt% CNT, especially is 8.8 °C. It shows after CNT mPP inorganic material, it plays prominent role heterogeneous nucleation. After CCF composited CNT/mPP, content 30 42 prepared, , crystallinity X ′ improved, greatly such initial 5.64 11.74 times. Even at end curve, CF still significantly higher than CNT/mPP. indicates will improved deformation resistance load mPP.