本論文研究主要在於探究半硬性共軛高分子poly{[2,5-di (2-(2-ethoxy-ethoxy)ethoxy)-1,4-phenylenevinylene]-alt-1,4-[phenylenevinylene]} (DTEO-alt -PV)，此高分子是由一個PPV主鏈，在支鏈上以EO側鏈取代之共軛高分子，此高分子的一些光物理性質已經在許多研究論文中發表，其主要是應用在發光電池元件（Light-emitting electrochemical cell (LEC)，一種以電化學方式驅動之發光元件）上，但到目前為止，其結構卻尚未被人深入的研究過，然而，許多研究都明確地指出，共軛高分子的光物理性質與其結構有很大的關係，本篇研究主要即針對此高分子的結構解析，以級結跟光物理性質的一些關連，經研究後發現，此高分子DTEO-alt-PV是一個半結晶性的高分子，在某些條件下，其會形成一個很明顯的結晶相，且此結晶相屬於一種單斜晶系，該非直角之夾角(□)約為103o，另外，為了更瞭解這個高分子，我們也進行了其結晶動力學的研究。
此外，為了達到深入瞭解結構-光物理性質之間關係的目標，我們藉由加入一些可以與DTEO-alt-PV之EO支鏈產生氫鍵的界面活性劑4-n-Dodecylresorcinol (DR)，得到一個摻合物，藉此企圖去改變此高分子原本的結構，文中我們將介紹此相當簡單卻能有效改變結構的方法，在添加此界面活性劑之後這個摻合物在較大的尺度下形成一個由DR domain與DTEO-alt-PV/DR miscible domain組成的層狀結構，而在較小尺度內，此DTEO-alt-PV/DR miscible domain之結構，是由DTEO-alt-PV分子平行的排列形成一個板子，而DR分子則在兩個板子之間互相穿插形成另外一個domain。

The present study centers on the supramolecular structure of a hairy rod conjugated polymer based on a poly(phenylenevinylene) backbone with oligo (oxyethylene) side chains attached, an alternating copolymer, poly{[2,5-di (2-(2-ethoxy-ethoxy)ethoxy)-1,4- phenylene vinylene]-alt-1,4-[phenylene vinylene]} (DTEO-alt-PV) in the neat state and the blends with other substances, including an oligomeric amiphiphile, a homopolymer and diblock copolymer. Due to the semiconductivity and electroluminescence of this conjugated polymer as well as its ability of ion transports, DTEO-alt-PV has the potential for applications in various fields, including photoelectric device and the ion-transportable separator between the electrodes. Nevertheless, the photophysical properties and the final device performance are expected to be strongly influenced by the structure and morphology of the polymer. In order to reveal the morphology and the structure-properties correlation of DTEO-alt-PV, for facilitating the optimization of optical and electronic properties, we proceed with a systematic study using SAXS, WAXS, TEM, UV, and PL as the major tools to achieve this goal.
For the present results, the powder diffraction profile revealed that the crystal structure of DTEO-alt-PV consisted of rod-like PPV segments packed in a monoclinic unit cell with angles β=103o. TEM micrograph revealed a semicrystalline lamellar structure with the interlamellar distance of c.a. 60 nm and a spherulitic morphology, and thus showed that DTEO-alt-PV was a semicrystalline polymer. Moreover, we also found that DTEO-alt-PV formed an orthorhombic mesophase in the shear-oriented film. In order to examine the crystallization behavior of DTEO-alt-PV, isothermal crystallization kinetics was investigated on the basis of the well-known Avrami equation as well. Finally, it was demonstrated that the absorption and emission behaviors were significantly affected by the thermally induced changes in the morphology. The correlation between photophyscial properties and morphology of DTEO-alt-PV had also been showed in the present work.
Another task is creating special supramolecular structure of DTEO-alt-PV (and thus possibly improve its physical and photophyscial properties) through the blending with an amiphiphile. The blend of DTEO-alt-PV and a surfactant, 4-n-dodecylresorcinol (DR), formed a lamellar structure which consisted of the parallelly-aligned DTEO-alt-PV layers and interdigitatedly-aligned DR layers.

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