【摘要】 分别以正硅酸乙酯、硅溶胶、纳米二氧化硅(SiO2)粉体为前驱体,通过原位聚合方法制备了不同种类的SiO2/UP(不饱和聚酯)复合树脂。采用模压成型方法,制备了SiO2/UP原位混杂复合材料,采用静态力学和动态力学方法,研究了不同种类的SiO2/UP原位混杂复合材料的力学性能和流变性能。结果表明,在3种不同SiO2/UP原位混杂复合材料中,纳米SiO2粉体(质量分数为3%)/UP原位混杂复合材料的综合力学性能最好;正硅酸乙酯/UP原位混杂复合材料耐水性能最好;纳米SiO2粉体/UP原位混杂复合材料和正硅酸乙酯/UP原位混杂复合材料适合于注塑、挤出等快速成型工艺,硅溶胶/UP原位混杂复合材料适合于模塑加工工艺。更多还原

【Abstract】 On the premise of the tetraethyl orthosilicate,silicon sol and the nano-SiO2 power respectively,a series of unsaturated resins containing nano-SiO2 groups were synthesized by in-situ polymerization.The nano-SiO2/UP in-situ hybrid composite materials were prepared by molding technology.The effects of different kinds of nano-SiO2/UP in-situ hybrid composites on mechanical and rheological properties were studied by static mechanical methods and dynamic mechanical analysis(DMA).The results show that the mechanical properties of nano-SiO2 power/UP in-situ hybrid composite is the best and water resistant performance of tetraethyl orthosilicate/UP in-situ hybrid composite is best in the three SiO2/UP in-situ hybrid composite materials prepared.The rapid-prototyping processes are suitable to nano-SiO2 power/UP in-situ hybrid composite materials and tetraethyl orthosilicate/UP in-situ hybrid composite materials,such as injection molding and extrusion process,while molding process fits for silicon sol/UP in-situ hybrid composite materials.Abstract:On the premise of the tetraethyl orthosilicate,silicon sol and the nano-SiO2 power respectively,a series of unsaturated resins containing nano-SiO2groups were synthe-sized by in-situ polymerization.The nano-SiO2/UP in-situ hybrid composite materials were prepared by molding technology.The effects of different kinds of nano-SiO2/UP in-situ hy-brid composites on mechanical and rheological properties were studied by static mechanical methods and dynamic mechanical analysis(DMA).The results show that the mechanical properties of nano-SiO2power/UP in-situ hybrid composite is the best and water resistant performance of tetraethyl orthosilicate/UP in-situ hybrid composite is best in the three SiO2/ UP in-situ hybrid composite materials prepared.The rapid-prototyping processes are suitable to nano-SiO2power/UP in-situ hybrid composite materials and tetraethyl orthosilicate/UP in-situ hybrid composite materials,such as injection molding and extrusion process,while molding process fits for silicon sol/UP in-situ hybrid composite materials.更多还原