Si-BM/IFR/ABS复合材料制备及其性能

Preparation and Properties of Si-BM/IFR/ABS Composites

利用硅烷偶联剂KH550对勃姆石(BM)表面进行处理,制备疏水性勃姆石(Si-BM),再与膨胀型阻燃剂(IFR)及丙烯腈-丁二烯-苯乙烯共聚物(ABS)混合造粒,制备Si-BM/IFR/ABS复合材料,对Si-BM/IFR/ABS复合材料的阻燃性能和力学性能进行研究。结果表明:KH550与BM通过接枝反应改善了其在复合材料中的相容性,但不改变BM本身的晶体结构。Si-BM作为协效阻燃剂,不仅能提高材料的阻燃性能,而且能提高材料的力学性能。当添加Si-BM质量分数1.0%时,Si-BM/IFR/ABS复合材料的拉伸强度为34.409MPa,冲击强度为3.95kJ/m2,极限氧指数由27.0%升高至30.0%,UL-94垂直燃烧达到V-0级,此时,复合材料的非牛顿指数最小。Si-BM/IFR/ABS体系复合材料的复数黏度随角频率增大而减小。

The surface of boehmite (BM) was treated with KH550 to prepare hydrophobic boehmite (Si-BM), and then was mixed with intumescent flame retardant and acrylonitrile-butadiene-styrene copolymer(ABS)to prepare Si-BM/IFR/ABS composites. The flame retardancy and mechanical properties of Si-BM/IFR/ABS composites were investigated. The results show that KH550 and BM improve the compatibility in the composites by grafting reaction, but do not change the crystal structure of BM itself. As a synergistic flame retardant, Si-BM can not only improve the flame retardancy of the material, but also improve the mechanical properties of the material. When the mass fraction of Si-BM is 1.0%, the tensile strength of Si-BM/IFR/ABS composites is 34.409 MPa, and the impact strength is 3.95 kJ/m 2, and the limiting oxygen index is increased from 27.0% to 30.0%. UL-94 reaches the V-0 level, at which point the composite has the lowest non-Newtonian index. The complex viscosity of Si-BM/IFR/ABS composites decreases with the increasing of angular frequency.