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

这项研究是一项关于导电聚合物的磁共振、光谱和结构研究的综合计划。它将侧重于特定的聚合物体系：1)具有相对高相对分子质量的高质量材料，这些材料是链排列的，并且在固态中具有相对较高的结晶度；例如，聚苯胺、PPV(及其衍生物)和PTV。2)可从溶液中加工为共轭体系或从溶液中以前体形式加工的聚合物(或两者，如取代的PPV的情况)。这方面的研究包括：聚苯胺在溶液中的稀一维链：聚苯胺在硫酸溶液中的小角中子散射：聚苯胺电子性质的分子质量依赖性：用于监测PPV(及其衍生物)从预聚体到共轭聚合物转变的ESR测量：熔融共轭聚合物的电子和光学性质；ESR研究优质聚合物中的极化子和双极子；非简并基态的PPV；溶液中二己氧基PPV中的极化子和双极化子；重掺杂PPV(及其衍生物)和PTV是否为真金属；共轭聚合物在溶液中的受迫瑞利散射；以及高有序导电聚合物中的晶体结构和链堆积。

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.