Kwon Yong-Rok, Kim Hae-Chan, Kim Jung-Soo, So Ju-Hee, Chang Young-Wook, Kim Dong-Hyun
Material & Component Convergence R&D Department, Korea Institute of Industrial Technology (KITECH), Ansansi 15588, Korea.
Department of Material Chemical Engineering, Hanyang University, Ansansi 15588, Korea.
Polymers (Basel). 2022 Sep 27;14(19):4062. doi: 10.3390/polym14194062.
A series of waterborne polyurethane (WPU) dispersions were prepared by chain-extending a prepolymer made of polyester diol, isophorone diisocyanate, and dimethylol propionic acid using cellulose acetate butyrate (CAB). The particle size and viscosity of the WPU dispersion were measured. In addition, we investigated the effects of CAB on the thermal, mechanical, and optical properties of WPU films. The use of CAB effectively improved the crosslinking degree of the WPUs, increasing the thermal stability and water resistance of the corresponding films. In particular, CAB increased the tensile strength of the WPU films up to 67%, while maintaining their elongation at break unchanged. In addition, CAB improved the optical transmittance by reducing the microphase separation between the soft and hard segments of PU. The rough surface structure of the WPU films formed by CAB led to improved matting properties.
通过使用醋酸丁酸纤维素（CAB）对由聚酯二醇、异佛尔酮二异氰酸酯和二羟甲基丙酸制成的预聚物进行扩链，制备了一系列水性聚氨酯（WPU）分散体。测量了WPU分散体的粒径和粘度。此外，我们研究了CAB对WPU薄膜的热性能、机械性能和光学性能的影响。CAB的使用有效地提高了WPU的交联度，提高了相应薄膜的热稳定性和耐水性。特别是，CAB将WPU薄膜的拉伸强度提高了67%，同时保持其断裂伸长率不变。此外，CAB通过减少PU软硬段之间的微相分离提高了透光率。由CAB形成的WPU薄膜的粗糙表面结构导致了消光性能的改善。
