文献类型：期刊文献

英文题名：Effects of graphene oxides on the cure behaviors of a tetrafunctional epoxy resin

作者：Qiu, S. L.[1] Wang, C. S.[1] Wang, Y. T.[1] Liu, C. G.[2] Chen, X. Y.[1] Xie, H. F.[1] Huang, Y. A.[3] Cheng, R. S.[1,4]

第一作者：Qiu, S. L.

通信作者：Xie, HF[1]

机构：[1]Nanjing Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab Mesoscop Chem,Dept Polymer Sci & Engn, Nanjing 210093, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, State Forestry Adm, Key Open Lab Forest Chem Engn, Nanjing 210042, Peoples R China;[3]Nanjing Inst Technol, Sch Mat Engn, Nanjing 211167, Peoples R China;[4]S China Univ Technol, Coll Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China

年份：2011

卷号：5

期号：9

起止页码：809-818

外文期刊名：EXPRESS POLYMER LETTERS

收录：;EI(收录号：20123215320975);Scopus(收录号：2-s2.0-79959875752);WOS:【SCI-EXPANDED(收录号:WOS:000292245400007)】；

语种：英文

外文关键词：nanocomposites; thermal properties; thermosetting resin; graphene oxide; epoxy resin

摘要：The influence of graphene oxides (GOs) on the cure behavior and thermal stability of a tetrafunctional tetraglycidyl-4,4'-diaminodiphenylmethane cured with 4,4'-diaminodiphenylsulfone was investigated by using dynamic differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The dynamic DSC results showed that the initial reaction temperature and exothermal peak temperature decreased with the increase of GO contents. Furthermore, the addition of GO increased the enthalpy of epoxy cure reaction. Results from activation energy method showed that activation energies of GO/epoxy nanocomposites greatly decreased with the GO content in the latter stage, indicating that GOs significantly hindered the occurrence of vitrification. The oxygen functionalities, such as hydroxyl and carboxyl groups, on the surface of GOs acted as catalysts and facilitated the curing reaction and the catalytic effect increased with the GO contents. TGA results revealed that the addition of GOs decreased the thermal stability of epoxy.