摘要
对潍坊某地的膨润土(MMT)原料进行提纯、用碳酸钠作为钠化剂进行钠化改型及有机改性,将之与聚苯乙烯(PS)复合制备出PS/OMMT纳米复合材料。重点研究了不同浓度的十六烷基三甲基溴化铵(CTAB)改性剂对MMT层间距的影响以及OMMT用量对复合材料力学性能的影响。结果表明:加入的十六烷基三甲基溴化铵浓度为40%时改性效果最好,得到的OMMT的层间距更大,可达到2.38 nm。在PS中加入OMMT以后,随着加入OMMT量的增多材料的拉伸强度和断裂强度分别提高了3 MPa和2 MPa,在OMMT用量为5%时,均达到10MPa,此时所得PS/OMMT纳米复合材料的高温热分解率达到6%,阻燃性能最好。OMMT的加入使纳米复合材料水平燃烧速度下降至9 mm/min,氧指数增加了3%,耐高温性能和阻燃性能增强。
For the preparation of Polystyrene（PS）/organic bentonite（OMMT） nanocomposites, the MMT in Weifang was purified, sodium by Na2CO3 and organic to be the organic （OMMT）, at last it was mixed with PS to prepare nanocomposites, it focused on the different concentrations of cetyi trimethyl ammonium bromide （CTAB） modifier layer spacing and the influence of the content of OMMT on the mechanical properties of composite materials. The results show that： the modification effect is optimal and the layer spacing of OMMT expands to 2.38 nm by adding cetyl trimethyl ammonium bromide concentration of 40%. After adding PS into OMMT, with the increase of the amount of OMMT, the tensile and notched impact strength increase by 3 MPa and 2 MPa respectively; when the addition of OMMT is 5%, the tensile and notched impact strength increase by 10 MPa both. When the amount of OMMT is 5%, the flame retardant property of PSi OMMT nanocomposites is the best, and the residual rate of thermal decomposition rate is 6%. With the addition of OMMT, the level of composite nanomaterials burning rate decreases to 9 mm/min, the oxygen index increases by 3%, and the high temperature resistant performance and flame retardant enhance.
出处
《塑料科技》
CAS
北大核心
2014年第12期59-64,共6页
Plastics Science and Technology
