In this research, toluene diisocyanate-2-hydroxyethyl methacrylate (TDI-HEMA) adduct was used to modify the hydroxyl groups on cellulose acetate butyrate (CAB) structure. The obtained oligomer was characterized by Fourier transform infrared and proton nuclear magnetic resonance (¹H NMR) spectroscopies, and gel permeation chromatography, respectively. Then, the UV-cured free films of the modified CAB oligomers were investigated in terms of thermal degradation, physicochemical, wettability, and mechanical properties. The chemical modification process was performed in various percentages; then, the contribution of the unreacted hydroxyl groups of CAB on the wettability, thermal degradation, and air/water vapor permeability properties were all investigated. The mechanical properties, thermal stability, and surface wettability character of pure CAB were improved with TDI-HEMA adduct modification. Electrospinning was used to obtain a fibrous layer in order to search the air/water vapor permeability properties. Modification of CAB caused decline in air/water vapor barrier character and thus enhanced the permeability properties.

中文翻译：

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紫外光固化醋酸丁酸纤维素酯基低聚物及其电纺纤维毡的化学，机械和热学性质

在这项研究中，甲苯二异氰酸酯-2-甲基丙烯酸羟乙酯（TDI-HEMA）加合物用于修饰乙酸丁酸纤维素（CAB）结构上的羟基。通过傅立叶变换红外和质子核磁共振（¹1 H NMR光谱和凝胶渗透色谱。然后，从热降解，理化，润湿性和机械性能方面研究了改性CAB低聚物的紫外线固化自由膜。化学修饰过程以不同的百分比进行；然后，研究了未反应的CAB羟基对润湿性，热降解和空气/水蒸气渗透性的影响。TDI-HEMA加合物改性可改善纯CAB的机械性能，热稳定性和表面润湿性。为了研究空气/水蒸气的渗透性，使用静电纺丝获得纤维层。CAB的改性导致空气/水蒸气阻隔特性下降，从而增强了渗透性。