论文标题
散装中聚（离子液体）s的多尺度结构和小角度中子散射的溶液
Multiscale structure of poly(ionic liquid)s in bulk and solutions by small angle neutron scattering
论文作者
论文摘要
聚（离子液体）S（pIL），类似于其离子液体（IL）类似物，呈现出由局部相互作用引起的纳米结构。首次通过在一系列具有不同的（1-乙烯基-3-烷基咪唑烷）S的小角度中子散射（1-乙烯基-3-烷基咪唑唑）S上广泛利用这种纳米结构对聚合物链的大分子构象的影响，并具有不同的烷基侧链和反植物的溶液和反植物。由于相邻单体之间的拥挤相互作用，回旋半径随着溶液的侧链长度而增加。然而，在散装半径的非单调演变中，反映了链柔韧性的变化和静电相互作用的潜在筛选。另外，在较小规模的情况下，SAN提供了对链直径和相邻链之间的相关长度的实验估计，这些链的比较揭示了烷基侧链固定的明确证据。这些结构特征在理解PIL的动态特性方面带来了宝贵的见解。
Poly(ionic liquid)s (PILs), similar to their ionic liquid (IL) analogues, present a nanostructure arising from local interactions. The influence of this nanostructure on the macromolecular conformation of polymer chains is investigated for the first time by means of an extensive use of small angle neutron scattering on a series of poly(1-vinyl-3-alkylimidazolium)s with varying alkyl side-chain length and counter-anion both in bulk and in dilute solutions. Radii of gyration are found to increase with the side-chain length in solution as a consequence of crowding interactions between neighboring monomers. In bulk, however, a non monotonic evolution of the radius of gyration reflects a change in chain flexibility and a potential screening of electrostatic interactions. Additionally at smaller scale, SANS provides an experimental estimation of both the chain diameter and the correlation length between neighboring chains, comparison of which unveils clear evidence of interdigitation of the alkyl side-chains. These structural features bring precious insights in the understanding of the dynamic properties of PILs.
