增塑剂对硅烷化聚氨酯密封胶性能的影响  

Effect of plastifiers on properties of siloxane end-capped polyurethane sealant

作　　者：马文石[1] 何景学[1] 

机构地区：[1]华南理工大学材料学院,广东广州510640

出　　处：《中国胶粘剂》2007年第9期11-14,共4页China Adhesives

摘　　要：以自制的硅烷化聚氨酯预聚物为主要原料,配合补强填料、增量填料、固化催化剂等配制成湿固化硅烷化聚氨酯(SPU)密封胶。通过溶胀实验和动态力学性能分析,讨论了增塑剂对SPU密封胶的溶胀性能、增塑效率以及力学性能的影响。结果表明,氯化石蜡-52、白油和液体石蜡三种增塑剂中,以氯化石蜡-52与SPU的相容性最好、增塑效率最高;当氯化石蜡-52用量为10份时,密封胶拉伸强度为1.65 MPa、断裂伸长率为335%、邵A硬度为37。Siloxane end-capped polyurethane （SPU）sealants were prepared from SPU prepolymer,reinforced fillers,incremental fillers and curing catalyst. Effect of plastifiers on compatibility,plasticizing efficiency,mechanical properties of SPU sealants were discussed by swelling test and dynamic properties analysis. Test results show that polar paraffin chloride-52 has the highest compatibility,plasticizing efficiency among paraffin chloride -52, mineral oil and liquid paraffin. When amount of paraffin chloride-52 is 10 phr, tensile strength,elongation at break and Shore A stiffness of SPU sealant are 1.65 MPa,335% and 37, respectively.

关 键 词：硅烷化聚氨酯 密封胶 增塑剂 增塑效率 力学性能 

分 类 号：TQ433.432[化学工程]