A series of fatty acid cellulose esters (FACEs) with both various degrees of substitution (from DS = 1.7 to 3) and side chain length were obtained by grafting aliphatic acid chlorides (from C10 to C16) onto cellulose backbone, in a homogeneous LiCl/DMAc medium. These materials were characterized by Fourier Transformed InfraRed (FTIR) and Nuclear Magnetic Resonance of Proton (1H NMR) spectroscopies, as well as Wide Angle X-ray Scattering (WAXS), Differential Scanning Calorimetry (DSC), mechanical analyses and chemical resistance to concentrated acid and alkali solutions. Whatever the alkyl chains length and the DS, all samples displayed a layered structure composed of a planar arrangement of parallel cellulosic backbones with fully extended flexible side chains oriented perpendicular to the planar structure without interdigitation. The alkyl chains were able to crystallize as soon as they are long enough. As the DS decreased, the plasticizing effect of the alkyl chains was less pronounced and their ability to crystallize was improved. Regarding the mechanical behavior and the chemical resistance, similar results were observed whatever the DS is.

中文翻译：

---

取代度和脂肪链长度影响脂肪酸纤维素酯的结构和性能。

通过将脂族酰氯（从C10到C16）接枝到纤维素骨架上，在均质LiCl /中获得一系列具有不同取代度（DS = 1.7至3）和侧链长度的脂肪酸纤维素酯（FACE）。 DMAc介质。这些材料的特征在于傅立叶变换红外（FTIR）和质子核磁共振（1H NMR）光谱学，以及广角X射线散射（WAXS），差示扫描量热法（DSC），机械分析和耐化学性酸和碱溶液。无论烷基链的长度和DS如何，所有样品均显示出层状结构，该结构由平行纤维素骨架的平面排列组成，具有完全延伸的柔性侧链，垂直于平面结构而定向，没有相互交叉。烷基链一旦足够长就能够结晶。随着DS的降低，烷基链的增塑作用不太明显，并且其结晶能力得到改善。关于机械性能和耐化学性，无论DS如何，都观察到相似的结果。