Seven linear amylose tris(n-octadecylcarbamate) (ATODC) samples ranging in the weight-average molar mass M_w from 2.4 × 10⁴ to 1.5 × 10⁶ g mol⁻¹ and their seven cyclic analogues (cATODC) of which M_w are from 3.6 × 10⁴ to 1.9 × 10⁵ g mol⁻¹ were prepared to characterize their conformation in tetrahydrohuran (THF), in 2-octanone (MHK), and in tert-butyl methyl ether (MTBE). Light and small-angle X-ray scattering and viscosity measurements in dilute solution were employed to determine the particle scattering function P(q), the z-average mean-square radius of gyration 〈S²〉_z, and the intrinsic viscosity [η]. The obtained data were analyzed in terms of the wormlike chain model to determine the helix pitch per residue h and the Kuhn segment length λ⁻¹ which is a measure of the chain stiffness and equal to twice the persistence length. The parameters indicate that the linear ATODC has an appreciably extended local helical structure and high chain stiffness while the latter parameter λ⁻¹ in THF is lower than those for amylose alkylcarbamates with shorter side chains. This is most likely due to the repulsion between relatively long side groups. This chain extension and less stiff main chain were more significantly observed for the cyclic chains. Lyotropic liquid crystallinity in concentrated solutions supports the high rigidity of ATODC and cATODC chains in solution.

七线性直链淀粉三（Ñ -octadecylcarbamate）（ATODC）样品测距的重均摩尔质量中号_瓦特从2.4×10 ⁴至1.5×10 ⁶ 克摩尔^-1和它们的7个环状类似物（cATODC），其中中号_瓦特是制备3.6×10 ⁴至1.9×10 ⁵  g mol ^-1以表征它们在四氢呋喃（THF），2-辛酮（MHK）和叔丁基甲基醚（MTBE）中的构象。在稀溶液中使用光和小角X射线散射以及粘度测量来确定颗粒散射函数P（q），z-平均旋转均方半径＆lt; S ^2＆ gt; _z和特性粘度[ η ]。根据蠕虫状链模型对获得的数据进行分析，以确定每个残基的螺旋螺距h和库恩链段长度λ ^-1，该长度是链刚度的量度，等于持久长度的两倍。这些参数表明线性ATODC具有明显扩展的局部螺旋结构和较高的链刚度，而后者的参数λ ^-1在THF中的芳烃含量低于具有较短侧链的直链淀粉烷基氨基甲酸酯的含量。这很可能是由于相对较长的侧基之间的排斥。对于环状链，这种扩链和刚性较弱的主链更为显着。浓溶液中的溶致液晶性支持溶液中ATODC和cATODC链的高刚性。