苯乙烯-N苯基马来酰亚胺共聚物/蒙脱土纳米复合材料的制备与表征

PREPARATION AND CHARACTERIZATION OF St-NPMI COPOLYMER/MONTMORILLONITE NANOCOMPOSITES

分别使用无机蒙脱土和有机蒙脱土用乳液插层的方法制备了苯乙烯-N苯基马来酰亚胺共聚物/蒙脱土纳米复合材料,并用FT-IR、XRD、DSC、TGA对其进行了表征。结果表明,两种蒙脱土在St-NPMI共聚物基体中,均已达到纳米分散,而且复合材料的热稳定性较纯St-NPMI共聚物有很大提高,尤其是有机蒙脱土纳米复合材料,其Tg提高60℃以上。

The novel styrene-N-phenylmaleimide copolymer-montmorillonite nanocomposites were prepared by emulsion intercalation copolymerization from Na^+-montmorillonite and montmorillonite modified by cetyltrimethylammonium brumide respectively. For comparative purposes, the copolymerization conditions(such as comonomer feed ratio and the polymerization temperature and times) were set up to be the same. After extracted with hot tetrahydrofuran , the products were characterized by FT-IR, XRD, DSC and TG. The results show that montmorillonite(Na^+-montmorillonite or organomontmorillonite) has been dispersed in the copolymer molecules at nano size and the thermal stability of the product is improved comparing with the pure styrene-N-phenylmaleimide copolymer. The T_g of organomontmorillonite nanocomposite is increased more than 60 ℃ compared to that of pure styrene-nphenylmaleimide copolymer.