Surface Modified Polymeric Magnets And The Studies On The Synthesis And Properties Of Polyferrocenylthiosemicarbazides

The first part of this thesis includes the following information: (1) The significance of materials and the progress in every fields of material science in recent years; (2) The history of magnetic material and the classification of magnetic material; (3) The emergency and the classification of organic magnetic materials as well as the significant progress in the field of ferrocene polymeric magnet recently; (4) Introducing die development and the status quo of dielectric polymer and discussing the four parameters which are used to characterize the dielectric beheaviour of material, these parameters mclude dielectric constants dielectric loss^ electric conductivity and breakdown strength.In the part of modifying the polymeric magnet. The author has introduced the method of modifying the polymeric magnet by acrylic acid and polycarbonate respectively and analyzed the samples which include non- and modified polymeric magnet in IR spectrum and XPS. This part lias been discussed in detail the differences of the modified polymeric magnet from non-modified one. The result of research into electromagnetic beheaviours of polymeric magnets as follows: all of the two agents (acrylic acid and polycarbonate) can reduce effectively magnetic loss and dielectric loss, moreover, acrylic acid can increase the dielectric constant of the polymeric magnet at high frequency and microwave band. On the whole, the polymeric magnet modified by acrylic acid is preferable. The research of IR spectrum and XPS of the polymeric magnets have showed that modifying polymeric magnet with acrylic acid is a chemical methodIn the part of composing polymer, we have chosen ferrocene as raw stuff. After a series ofreactions, an ester which is a derivative of ferrocene is obtained, then using the ester react with 1,8-naphthalenediamme, o - m - , p - phenyleiiediamine,ethylenediamine and 4.4'--biphenyldiamine respectively, polymer(I) (II) (III) (IV) (V) and polymer (VI) are obtainedAt the final part, we have discussed in brief the general properties of polymer (I)-{VI) and analyzed systematically HNMR IR spectrum TG-DT diagram and molecular weight distribution of these polymers.The result of research into HNMR and TR spectrum of the polymers have showed: intramolecular hydrogen bond is formed by the oxide atom of carboxide joining with hydrogen atom of arylamine so mat a plane hexatomic ring appears in the molecule; this hydrogen bond has reduced the distance of ferrocene groups and strengthened the interaction of ferrocene groups.Researching into TG-DT diagrams, we have concluded as follows: the initial decomposition temperature (IDCT) of polymer (I) is 220C and the first lost group (FLG) Ls carboxide; the IDCT of polymer (HI) is 194Cand the FLG is -NH; so the pyrolysis mechanisms of the two polymers are different.The research of molecular weight distribution have indicated mat some polymers have high molecular weight and high polydispersity. According to this, we have deduced that branching reaction must have been happened during the polymerization which has been caused by chain transfer at high conversion rate.