point-by-point test
7.It is found that the combination of vacuum distillation and recrystallization is a feasible process for isolation and purification diphenyl carbonate. The remainder after vacuum distillation is disposed by ethanol, the yield of DPC arrived at about 60.5%. The purity of DPC was tested by melting point, APHA, IR, Fe content and phenol content, the test results show that the purity of disposing DPC accords with the standard of industrial product.
8.The amount,morphology,distribution and substructure of remained austenite(AR) in 40MnMoV steel under normalized and tempered after normalizing conditions have been investigated by means of optical microscopy(OPM),TEM,X-ray diffraction,tensile test and three point bending test. Especially the effect of AR on the mechanical behaviour of the steel was discussed.
9.The results from basic properties,shear resistance,pressure strength and point film test show that different low molecular polyamide may affect extrodinary by the properties of cured expoxy resin??the higher viscosity,the lower cured activity(rate);the higher amine number,the stronger cure construction.The cured expoxy resin will prossess unfavourable mechanics when it is cured by the polyamide with both too high viscosity and amine number.
