Preparation And Micromorphological Struture Of Modified Polyethlene Oxide-Metal Composites

In this paper, two methods were tried to improve property of water-fast of Polyethylene oxide (PEO). One method was carried through grafting PEO with Triisocyanate; the other is to form blend through macromolecular complex between Methyl-Methacrylate-co-Methacrylic Acid (MMA-co-MAA) and PEO. We aim to make PEO as the matrix for Polymer-based Metal Gradient Composite Film (PMGCF) through "solution reduction synthesis" . If PEO dissolves in water, Swelling Cathode Film (SCF) made by PEO will fall to pieces during the reduction procedure.The two routes turn out to be feasible in preparing desirable modified PEO. Dissolving experiments measured water-fast property of grafted PEO, and the blend was observed by Polarized optical microscope (POM) to make sure that blending reduces crystallization capability of PEO. The conditions under which desirable PEO were prepared were optimized.For grafted PEO, it was reduced electrochemically under the proper electrochemical conditions to synthesize Polymer-based Metal Composite Film ( PMCF) . In this paper, we analyzed the factors, which would affect electrochemical procedures through experiments, such as temperature, voltage, extent of predrying. A transmittance electronic microscope (TEM) is used to determine the micromorphological structure in the cross-section of PMCF. Nanoscale particle scattered in Polymer matrix were found underTEM. The particles were observed through X-ray Diffraction method, to be copper nanoscale crystal. A possible model was put forward about the mechanism for the nanoscale copper crystal got in PMCF. PMGCF was prepared by the route of blend PE0. The factors, which would affect the synthesis procedure and the micromorphological structure of PMGCF, were also analyzed. In the experiments we found that: introduction of H20 in solution increases the amount of reduced copper, but the copper in PMGCF becomes more scattered; increase of MMA-co-MAA in the blend will decrease the amount of reduced copper because of rigid segment in MMA and favors the formation of branch-like crystal. Based the mechanism about bafflement of H+ to reduction of Cu+, put forward by our group, the affect of PH value of the medium to micromorphological structure of PMGCF was discussed.