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首先以季戊四醇为“核”、2,2-二羟甲基丙酸为支化单体通过逐步聚合的方法合成了第3代超支化聚酯。再以超支化聚酯为模板,通过还原技术合成了Ag-Cu合金粒子。对合成的超支化聚酯及Ag-Cu合金粒子用红外光谱、紫外光谱、X射线衍射仪、激光粒度仪、扫描电镜和热分析进行了表征。结果表明,在Ag-Cu合金粒子的表面有超支化聚酯存在。Ag-Cu合金粒子在210和450 nm处有较强紫外吸收峰。Ag-Cu合金粒子的X射线衍射峰与标准卡片基本一致。大部分Ag-Cu合金粒子的粒径在1.2μm左右。Ag-Cu合金粒子具有较好的热稳定性。
The third generation of hyperbranched polyesters was synthesized by stepwise polymerization using pentaerythritol as the “core” and 2,2-dimethylolpropionic acid as the branched monomers. Using hyperbranched polyester as template, Ag-Cu alloy particles were synthesized by reduction technique. The synthesized hyperbranched polyester and Ag-Cu alloy particles were characterized by IR, UV, X-ray diffraction, laser particle size analyzer, scanning electron microscopy and thermal analysis. The results show that the presence of hyperbranched polyesters on the surface of Ag-Cu alloy particles. Ag-Cu alloy particles have strong UV absorption peaks at 210 and 450 nm. The X-ray diffraction peaks of Ag-Cu alloy particles are basically the same as those of standard cards. The particle size of most Ag-Cu alloy particles is about 1.2μm. Ag-Cu alloy particles have better thermal stability.