在不加任何还原剂的条件下,采用超声辐射引发溶液聚合制备纳米铁/聚(甲基丙烯酸甲酯-苯乙烯)[P (MMA-St)]复合材料。用XRD、TEM、XPS、FT-IR和TG等分析方法表征结构、热稳定性以及纳米铁与基体 P (MMA-St)之间的相互作用。结果表明,纳米铁粒子具有体心立方晶系结构,粒径在20~40 nm,且与基体中羰基碳原子和氧原子存在相互作用；纳米铁/P(MMA-St)复合材料热稳定性好,氮气气氛下在660℃开始分解,在850℃的高温下仅损失32％。
Nano-iron/poly(methyl methacrylate-styrene)[P(MMA-St)]composites were synthesized by solution polymerization ultrasonically without addition of reducer.The morphology,microstructure,thermal stability and the interaction between nano-iron and P(MMA-St)matrix of the composites were characterized by means of techniques including X-ray diffractometer (XRD),transmission electron microscopy (TEM),X-ray photoelec-tron spectroscopy (XPS),Fourier transform infrared spectroscopy (FTIR)and thermal-gravimetry analyzer (TGA)et al.The results showed that the size of nano-iron particles was about 20-40 nm with possessed cubic face-centered structure,and there existed an interaction between nanoiron particles and C?O from P(MMA-St) matrix;the nano-iron/P (MMA-St ) composites was highly thermally stable;the decomposition of it was 660 ℃,and about 32% loss weight was measured at 850 ℃ under nitrogen atomosphere.
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