Matrix Polymer On The Polymer Fund Is A Gradient Composite Morphological Changes

In this paper, PAN based metal gradient composites films (PMGCF) were prepared by electrochemical reduction. The effect of polymer matrix on PMGCF and preparation and its forming mechanism of PMGCF were invested , They are as follows:lAcrylonitrile-methyl-methacrylate copolymer, acryonitrile-itaconic acid copolymer, acrylonitrile-methyl methacry late-sodium allyl sulfonate terpolymer have been synthesized seperately in order to analyze the effects of the MMA monomer unites and the hydrophilic unites of acryonitrile terpolymer on the process of copper deposition in polyacrylonitrile-based metal gradient composite film (PMGCF) as well as the flexibility of the film. These copolymer were prepared by using NaClO3 NaHSO3 as the initiator in water precipitation polymerization. Their properties were studied by means of FTIR, NMR-H1, Ubbelodhe viscosimeter.2PMGCF was prepared through solution-reduction synthesis (SRS). First, polymer-metal-solvent solution was prepared. Secondly it was coated on the cathode surface. Finally the electrochemical reduction was processed in a particular medium solution. The influence factors to electrochemical deposition and gradient distribution of PMGCF, such as the predrying extent of the swelling cathode film, the excessive power voltage of the cathode, the PH value of electrochemical reduction medium solutionn, the microstrucure of polymer matrix, were majorly invested in this thesis. The result showed that the interpenetration network structure between polymeric and deposited metal has been observed under a scanning electronic microscope and optical microscope. The experiments showed that copper deposition gradient distribution and crystal structure were greatly influenced by the the PH value of electrochemical reduction medium solution and the size, numberand distributing of microporous in swelling cathode film.3 The experiment showed that there is no copper deposition in the film using P(AN-MMA) as polymer matrix. But the copper deposition and gradient distributing appears in the film when using P(AN-ITA) and P(AN-MMA-AS) as polymer matrix. The size and number of crystal increases as the concentration of ITA in copolymer increase and the film is prone to be ruptured. On the other hand, when using P(AN-MMA-AS) as polymer matrix , the gradient distribution of copper in PMGCF is raisonne , the crystal is smaller and compacter than the former, the flexibility of PMGCF increase as the concentration of MMA in copolymer increase , the size of copper crystal increase as as the concentration of ITA in copolymer increase. It is the especial congregate structure of polymer matrix that is necessary for the forming of three-dimensional interpenetrate network between the polymer and copper. The MMA unites lead to the advantage of improving fiexibity of the film, destroying the formal arrangement of macromolecule chain in polymer and decreasing the degree of crystallization. The ITA unites help the solvolyzed copper ion transfer in the film and benefite the forming and establishment of the networks of polymer matrix.Lixiutao (material science) Supervisor: Prof. Jiangguo Tang and Prof. Yanzhi Xia...