Conducting Polymers as Macromolecular Systems: Comprehensive Studies in Solution, in the Melt, and in the Solid State

本研究是对导电聚合物进行磁共振、波谱和结构研究的综合项目。它将专注于特定的聚合物体系：1)具有相对高分子量的高质量材料，这些材料是链排列的，在固体状态下具有较高的结晶度；例如聚苯胺、PPV（及其衍生物）和PTV。2)可从溶液中加工成共轭体系或从溶液中加工成前驱体形式的聚合物（或两者兼而有之，如取代PPV的情况）。研究内容包括：溶液中稀聚苯胺的一维链；硫酸溶液中聚苯胺的小角中子散射；聚苯胺电子性质的分子量依赖性；PPV（及其衍生物）的ESR测量以监测从预聚物到共轭聚合物的转化；熔融共轭聚合物的电子和光学性质；非简并基态高质量聚合物中极化子和双极化子的ESR研究二己氧基- ppv溶液中的极化子和双极化子；确定重掺杂PPV（及其衍生物）和PTV是否为真金属；溶液中共轭聚合物的强迫瑞利散射；以及高有序导电聚合物中的晶体结构和链式排列。

This research is a comprehensive program of magnetic resonance, spectroscopic and structural studies on conducting polymers. It will focus on specific polymer systems: 1) High-quality materials with relatively high molecular weight which are chain aligned and have relatively high crystallinity in the solid state; examples include polyaniline, PPV (and its derivatives), and PTV. 2) Polymers which are processible either as conjugated systems from solution or in precursor form from solution (or both, as in the case of the substituted PPV). The research includes the following: dilute one-dimensional chains of polyaniline in solution: small-angle Neutron scattering from Polyaniline in solution in sulfuric acid: molecular-weight dependences of the electronic properties of polyaniline: ESR measurements of PPV (and derivatives) to monitor conversion from prepolymer to conjugated polymer: electronic and optical Properties of molten conjugated polymers; ESR Studies of polarons and bipolarons in high-quality polymers with a nondegenerate ground state; polarons and bipolarons in dihexyloxy-PPV in solution; determination of whether or not heavily doped PPV (and derivatives) and PTV are true metals; forced Rayleigh scattering by conjugated polymers in solution; and crystal structures and chain packing in highly ordered conducting polymers.