合成革用高光高透水性聚氨酯的构效关系

基于水基聚氨酯(WPU)结构与涂层光泽和透度的构效关系,制备了可满足合成革的光学性能要求的高光泽、高透度的水基聚氨酯,研究了不同二异氰酸酯、多元醇、硬段含量、亲水基团含量、乳胶粒径及分布、交联度和结晶度等结构因素对水基聚氨酯涂层光学性能的影响。结果表明,聚合物中所含基团的折光指数是影响涂层光学性能的重要因素,高折光率的芳环、酯键、氨基甲酸酯基和脲基能提高涂层光泽;高的硬段含量导致大分子链中氨基甲酸酯键或脲键含量增加,也能提高光泽度;水基聚氨酯的聚集态结构也是影响涂层光学性能的重要因素,结晶性的软、硬段会降低涂层的透光率,而共聚、引入侧基和交联破坏了大分子的规整性和结晶性,能改善涂层的透光度。水基聚氨酯的粒径对涂层的光泽亦产生重要影响,较小的乳胶粒径(<50 nm)将使涂层表面更平整光滑,涂层的光泽度更高。

Multi-Agent Consensus Control Scheme for the Load Control Problem

With the help of smart grid technologies,a lot of electrical loads can provide demand response to support the active power balance of the grid.Compared with centralized control methods,decentralized methods reduce the computational burden of the control center and enhance the reliability of the communication.In this paper,a novel second-order multi-agent consensus control method is proposed for load control problem.By introducing the velocity state into the model,the proposed method achieves better performance than traditional ones.Simulation results verify the effectiveness of the proposed method.