摘要
以硅烷偶联剂γ-氨丙基三乙氧基硅烷(KH550)为封端剂对阳离子型水性聚氨酯进行杂化改性,并以KH550和γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)为原料合成新型偶联剂D,对聚氨酯进行复合改性,分别合成了纳米SiO2/PU杂化材料和纳米SiO2/PU复合材料。通过FT-IR、粒径分析、AFM对样品的结构进行表征,并对样品的力学性能和耐水性、耐溶剂性进行测试。结果表明:两种体系均生成了二氧化硅相,二氧化硅相在杂化体系中的分散性好于其在复合体系中的分散性。对提高产品性能而言,化学封端改性比物理共混改性更有效。
Cationic waterborne polyurethane was hybrided by silane coupling agent KH550 as terminating agent and a new kind of silane coupling agent prepared by KH550 and KH560 via chemical reaction and physical blending, respectively. The structure, particle size, surface morphology was characterized by FT- IR, size analyzar and AFM. The mechanical properties, water and solvent resistance of samples were also tested. The results confirmed the formation of SiO2 in the two systems and the diffusion of SiO2 in hybrid system was better than that in composite system. Chemical modification was better than physical blending on improvement of properties products.
出处
《涂料工业》
CAS
CSCD
北大核心
2011年第2期25-28,32,共5页
Paint & Coatings Industry
