Toughness Enhancement in ROMP Functionalized Carbon Nanotube/Polydicyclopentadiene Composites
Toughness Enhancement in ROMP Functionalized Carbon Nanotube/Polydicyclopentadiene Composites
复制标题
DOI：
10.1021/cm8020947
复制
发表时间：
2008-11-25
影响因子：
8.6
通讯作者：
Kessler, M. R.
中科院分区：
文献类型：
--
作者：
Jeong, Wonje;Kessler, M. R.
通过开环复分解聚合（ROMP）制备了降冰片烯功能化多壁碳纳米管（MWNT）/二环戊二烯（DCPD）纳米复合材料。通过仅加入 0.4 wt% 的功能化 MWNT，与纯聚 DCPD 相比，拉伸韧性增加了 900% 以上。随着纳米管负载量的增加，还观察到模量和强度略有增加。通过差示扫描量热法 (DSC) 评估了降冰片烯接枝的 MWNT 对所得交联聚 DCPD 网络的聚合动力学的影响。复合材料的玻璃化转变温度随着功能化 MWNT 的添加而增加。此外，通过动态力学分析测量的阻尼行为的降低可用于估计有效的聚合物-颗粒界面厚度。
Norbornene-functionalized multiwalled carbon nanotube (MWNT)/dicyclopentadiene (DCPD) nanocomposites have been prepared by ring-opening metathesis polymerization (ROMP). Tensile toughness is shown to increase by more than 900% compared to neat polyDCPD by incorporating just 0.4 wt % functionalized MWNTs. Modest increases in modulus and strength were also observed with increasing nanotube loadings. The effect of norbomene grafted MWNTs on the polymerization kinetics of the resulting cross-linked polyDCPD network was evaluated by differential scanning calorimetry (DSC). The glass-transition temperatures of the composites are shown to increase with addition of functionalized MWNTs. Moreover, a decrease in damping behavior, as measured by dynamic mechanical analysis, is used to estimate the effective polymer-particle interphase thickness.