5380-87-0Relevant articles and documents
Sonochemical transformation of epoxy-amine thermoset into soluble and reusable polymers
Min, Yuqin,Huang, Shuyun,Wang, Yuxiang,Zhang, Zhijun,Du, Binyang,Zhang, Xinghong,Fan, Zhiqiang
, p. 316 - 322 (2015)
(Chemical Equation Presented). The degradation and reuse of epoxy thermosets have significant impact on the environments. We report that an epoxy-amine thermoset embedded with Diels-Alder (DA) bonds was transformed into soluble polymers via sonochemistry under mild temperature (ca. 20 °C) for the first time. Sonication could effectively induce the position-oriented cleavage of DA bonds (i.e., retro-DA) of the fully swelled epoxy thermoset in dimethyl sulfoxide (DMSO), leading to the soluble polymers. Of importance, such sonochemical process could be regulated on demand via switching on-and-o ff of the sonication. The obtained soluble polymers could be recured to form epoxy-amine thermosets via DA reaction. This sonochemical method might provide an unprecedented and efficient way to the controlled degradation and recycling of the epoxy thermosets containing the dynamic covalent bonds likes DA groups.
Study on the curing reaction kinetics of a novel epoxy system
Ding, Jiheng,Peng, Wanjun,Luo, Ting,Yu, Haibin
, p. 6981 - 6987 (2017)
The anhydride curing agent of 3,6-enodro-1,2,3,6-tetrahydrophthalic anhydride (OBPA) and the reactive epoxy diluent of furfuryl glycidyl ether (FGE) were prepared and characterized by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (1H NMR). The curing reaction kinetics process of an EP/OBPA/FGE epoxy system was studied by non-isothermal DSC methods. The parameters of the kinetics were calculated using the Kissinger model, Crnae model, Ozawa model and β-T (temperature-heating speed) extrapolation, respectively. In addition, the effect of FGE on the thermomechanical properties (glass transition temperature) and mechanical properties (flexural strength and the tensile strength) in the EP/OBPA/FGE were studied, indicating that when the content of FGE was 10 wt% the epoxy system reaches the best mechanical properties.
Synthesis and antibacterial activity of aromatic and heteroaromatic amino alcohols
de Almeida, Camila G.,Reis, Samira G.,de Almeida, Angelina M.,Diniz, Claudio G.,da Silva, Vania L.,Le Hyaric, Mireille
experimental part, p. 876 - 880 (2012/06/18)
Two series of aromatic and heteroaromatic amino alcohols were synthesized from alcohols and aldehydes and evaluated for their antibacterial activities. All the octylated compounds displayed a better activity against the four bacteria tested when evaluated by the agar diffusion method and were selected for the evaluation of minimal inhibitory concentration. The best results were obtained for p-octyloxybenzyl derivatives against Staphylococcus epidermidis (minimal inhibitory concentrations = 32μm).