We report here the photovoltaic behavior of a series of substituted ethenyl aniline derivatives containing donor and acceptor groups. This work indicates that the photovoltaic response is closely correlated with the s...We report here the photovoltaic behavior of a series of substituted ethenyl aniline derivatives containing donor and acceptor groups. This work indicates that the photovoltaic response is closely correlated with the substituents. The molecular structure/photovoltaic response relationship is presented and discussed in terms of the charge separation in an intramolecular charge transfer compound.展开更多
The coupling of the pre-stressed thermal insulated tubing string broke down inside the steam flooding welts, after the tubing were used in high temperature and high pressure steam for about two years. With further che...The coupling of the pre-stressed thermal insulated tubing string broke down inside the steam flooding welts, after the tubing were used in high temperature and high pressure steam for about two years. With further check, it was found that most of the weld joints between the inner and outer tubing also cracked. The failure analysis for the accidents has been carried out by the analysis of chemical composition for the steels, microstructure observation, mechanical property tests, and the investigation of the service environment etc.. The results show that the early damage of the pre-stressed thermal insulated tubing string is mainly induced by the caustic stress corrosion, which can be strengthened by an unstable microstructure of the coupling serviced at high temperature for a long time. Moreover, the high pre-stress design on the thermal insulated pipe for the cyclic steam injection may be not suitable to the situation of steam flooding, which would result in the weld joint cracking.展开更多
文摘We report here the photovoltaic behavior of a series of substituted ethenyl aniline derivatives containing donor and acceptor groups. This work indicates that the photovoltaic response is closely correlated with the substituents. The molecular structure/photovoltaic response relationship is presented and discussed in terms of the charge separation in an intramolecular charge transfer compound.
文摘The coupling of the pre-stressed thermal insulated tubing string broke down inside the steam flooding welts, after the tubing were used in high temperature and high pressure steam for about two years. With further check, it was found that most of the weld joints between the inner and outer tubing also cracked. The failure analysis for the accidents has been carried out by the analysis of chemical composition for the steels, microstructure observation, mechanical property tests, and the investigation of the service environment etc.. The results show that the early damage of the pre-stressed thermal insulated tubing string is mainly induced by the caustic stress corrosion, which can be strengthened by an unstable microstructure of the coupling serviced at high temperature for a long time. Moreover, the high pre-stress design on the thermal insulated pipe for the cyclic steam injection may be not suitable to the situation of steam flooding, which would result in the weld joint cracking.
