Journal of Polymer Research ( IF 2.8 ) Pub Date : 2020-01-11 , DOI: 10.1007/s10965-020-2008-x Lingran Hou , Jian Gao , Hong Ruan , Xu Xu , Shaorong Lu
Graphene nanosheets (GNs) often results in incompatibility with the hydrophobic polymer matrix, and the tendency to form aggregates during processing. Herein, hyperbranched polycaprolactone modified GNs (PGNs) was obtained using 3,4,9,10-perylenetetracarboxylic acid anhydride (PTCDA)reacted with GNs and caprolactone. Firstly, π-π stacking interactions between GNs and perylenebisimide derivatives (PBI), and then in-situ polymerization of ε-caprolactone. The structure and characteristic of PGNs were investigated by infrared spectroscopy, wide angle X-ray diffractometry, thermogravimetric analysis and ultraviolet spectrum. PGNs was added into epoxy matrix at different contents to improve the mechanical and thermal properties of epoxy. At 1.0 wt.% PGNs content, the impact strength and tensile strength of PGNs/epoxy composites were 43.41 kJ/m2 and 91.60 MPa. Compared with those of pure epoxy, these value increased by148% and 87%, respectively, as well as the Tg increased by about 20 °C.
中文翻译:
超支化聚(ε-己内酯)改性石墨烯/环氧树脂复合材料的力学和热学性能
石墨烯纳米片(GNs)通常导致与疏水性聚合物基质不相容,并在加工过程中形成聚集体。在此,使用与GN和己内酯反应的3,4,9,10-per四甲酸酐(PTCDA)获得了超支化的聚己内酯修饰的GN(PGN)。首先,GN与per双酰亚胺衍生物(PBI)之间存在π-π堆积相互作用,然后ε-己内酯就地聚合。通过红外光谱,广角X射线衍射,热重分析和紫外光谱研究了PGN的结构和特性。将PGN以不同的含量添加到环氧树脂基质中,以改善环氧树脂的机械性能和热性能。在PGNs含量为1.0 wt。%时,PGNs /环氧树脂复合材料的冲击强度和拉伸强度为43.41 kJ / m2和91.60 MPa。与纯环氧树脂相比,这些值分别增加了148%和87%,并且T g增加了约20°C。