Hydrophilic Polymer Fund Is A Gradient Morphology And Mechanical Properties Of Composite Materials

In this article,the micromorphological structure of PVA-copper gradient composite film (MPGCF) obtained from the electrochemical reduction of a swelling cathode films (SCFs) was studied by the scaning electronic microscope and the relationship between the micromorphological structure of the composite film and the electrochemical conditions such as the weight ratio of PVA to CuC12, the material of the electrode , the concentration of the medium solution, the dring time of SCF, the power Voltage, the time of the electochemical reaction etc, investigated. Furthermore,on the basis of them , the relationship between the mechanical properties and the micromorphological structure was also discussed. The MPGCFs observed by SEM have such characteristics as the concentration of the deposited metal varied gradiently across the section of the film. One side is deposited phase ,which is mainly composed of predominant metal and minal polymer;and the other is undeposited phase ,which is polymer matrix and hardly contains metal; and between the two side is the transition phase, where the polymer and metal interpenetrated. The analytic results of the effects on the micromorphological structure of the film by the electrochemical condition's showed that the carbon is apt to improve the boundary combination between the SCFs and the surface of the cathode and the seperation of the films,and that the micromorphological structure of the MPGCFs is greatly affected by the dring and the power voltage,which remarkably affluence ionmove in swelling cathode film,and that higher temperature and concentration of Cu2+ in the medium solution are also advanagable to the deposition of Cu in SCFs. The plot of deformation behavior of MPGCFs showed that the maximum strench ratio decreases and the brittleness increases due to the existence of the metal phase,and that the strengh trend of the composite films is fistly up and down followed with the content of metal phase because of the change of the role of the metal phase from acting as the physical cross-linking to weakening the films due to destroying the whole structure of the polymer .