The Synthesis And Research Of Poly(3-Hexylythiophe-Ne)-block-poly(Hexadecyloxylallene)

Conjugated conducting polymers, by virtue of its excellent electrical and opticalproperties, is widely used in organic photovoltaic cells, light-emitting diodes,field-effect transistors and other fields. The polythiophene and its derivatives is a kindof conductive polymers as easy preparation and good environment stability. It is a verypromising polymers. Allenes represent a class of interesting reactive compounds bearingdouble bonds in the molecular structure. Through1,2or2,3polymerization of thecumulative double bonds, the double bond was introduced to the polymer backbone,which would lead to the generation of P3HT-b-polyallene block copolymers. This novelstructure is expected to endow polymers with special performance, so as to provide awider selection for the preparation of functional polymer materials. In this paper, usingNi(II)-terminated P3HT as a catalyst via the Ni-catalyzed Grignard metathesis (GRIM),we obtain poly(3-hexylythiophenes)-b-poly(aklxoyallenes) diblock copolymers, whichwere obtained in relatively low polydispersities and Mn’s proportional to the feedratio of monomer to macroinitiator. And then we prove that this kind of polymerizationis living/controlled polymerization.Using size exclusion chromatography (SEC) tomonitor the reaction process,1H NMR and UV-Vis, IR is used for characterization ofthe copolymer. In addition, we have prepared poly (triethoxy methyl thiophene)-b-poly(aklxoyallenes) in the same way. The purpose of this thesis is the synthesis of thepolythiophenes-b-polyallenes block copolymers, then to study the performance of thesepolymers.In this paper,we have successfully synthesised the compounds of aklxoyallene,triethoxy methyl allenes and triethoxy methyl thiophenes through simple methods.Moreover, we have develop an efficient approach to synthesizepoly(3-hexylythiophene)-b-poly(aklxoyallene) with the[1,3-bis(diphenylphosphino)propane]nickel(II) chloride (Ni (dppp) Cl2)as the catalyst,By controling the feed ratio of monomer to macroinitiator, a series of different blockcopolymer have prepared. In addition, we focus on the thermal properties andself-assembly properties of the diblock polymers.