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   Modified and Unmodified Graphite/Unsaturated Polyester Resin Composites: Thermal and Mechanical Behavior  
   
نویسنده Yavari N. ,Poorabdollah M. ,Rajabi L.
منبع Iranian Journal Of Chemical Engineering - 2020 - دوره : 17 - شماره : 2 - صفحه:14 -33
چکیده    In this study, the unmodified graphite and graphite modified with a silane agent have been used to ameliorate the thermal conductivity coefficient and dynamical properties of unsaturated polyester resins. the effect of the addition of the unmodified graphite and modified graphite on the thermal conductivity coefficient and dynamical properties of unsaturated polyester resins in the graphite amounts of 0.02 % and 0.3 % by weight were studied using the solid thermal conductivity measuring device and dma test. the results showed that the silane modifier could help to create strong covalent bonds between graphite particles and the unsaturated polyester resins network and cause changes in thermal and dynamic properties compared to unmodified graphite particles. adding 0.3 % by weight of the unmodified graphite to the unsaturated polyester resins resulted in a 7 % raise in the storage modulus in the glassy region. however, adding the same amount of graphite modified using the silane agent increased the storage modulus by 33 % in the glassy region. the silane modifier caused a better dispersion of graphite particles in the resin structure. the superior dispersion of graphite particles caused more interaction between graphite particles and the resin network, which significantly increased the modulus of the unsaturated polyester resins. in contrast, the better dispersion of graphite particles because of the presence of the silane agent increased the thermal resistance at the surface of graphite particles, which reduced the thermal conductivity coefficient compared to the same regarding unmodified graphite.
کلیدواژه Unsaturated Polyester ,Graphite ,Silane ,Dma ,Thermal Conductivity Coefficient
آدرس Razi University, Department Of Chemical Engineering, Iran, Razi University, Department Of Chemical Engineering, Iran, Razi University, Department Of Chemical Engineering, Iran
پست الکترونیکی laleh.rajabi@gmail.com
 
     
   
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