【摘要】 为提高蓖麻油基聚氨酯(Castor oil-based polyurethane, CO-PU)的综合性能，选用三种硅烷偶联剂对CO-PU进行改性，制备得到硅烷偶联剂改性的蓖麻油基聚氨酯。采用傅里叶变换红外光谱仪进行表征，并探究不同硅烷偶联剂种类及质量比对聚合物拉伸性能、光泽度、水接触角等物理性能的影响。研究结果表明，1 wt%的KH-560改性CO-PU的综合性能相对较好，漆膜的抗拉强度和断裂伸长率分别达到37.6 MPa和131.9%,水接触角和光泽度分别达到91°和90.4 GU,铅笔硬度达到2H,柔韧性达到2 mm,附着力达到0级，耐冲击高度为50 cm。这种简便的改性能够在一定程度上提高CO-PU的综合性能，为后续扩展聚氨酯的应用提供了研究思路和方法。更多还原

【Abstract】 In order to enhance the overall performance of castor oil-based polyurethane(CO-PU),three silane coupling agents were selected for the modification of CO-PU.The silane coupling agent-modified castor oil-based polyurethane was then prepared and characterised by Fourier transform infrared spectroscopy.The effects of different silane coupling agent types and mass ratios on the physical properties of the polymers, such as tensile properties, gloss, and water contact angle, were investigated.The findings indicated that the 1 wt% KH-560 modified CO-PU exhibited a notable degree of overall properties, with the tensile strength and elongation at break of the paint film measuring 37.6 MPa and 131.9 %,respectively.Additionally, the water contact angle and gloss levels were recorded at 91° and 90.4 GU,while the pencil hardness, flexibility, adhesion, and height of impact resistance were determined to be 2H,2 mm, grade 0,and 50 cm, respectively.This facile modification can improve the comprehensive performance of CO-PU to a certain extent, which provides research ideas and methods for the subsequent extension of polyurethane applications.更多还原