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低密度聚合物泡沫在惯性约束聚变靶及电磁内爆靶中应用十分广泛。以三羟甲基丙烷三丙烯酸酯(TMP-TA)为聚合单体,安息香甲基醚为引发剂,通过紫外光引发生成凝胶,经超临界干燥得到TMPTA泡沫材料。通过红外光谱仪和元素分析仪确定了TMPTA单体中官能团转化率及泡沫纯度的表征。实验结果表明,聚合反应过程中,在1636cm-1附近碳碳双键(C=C)的转化率为40.48%,泡沫为高纯度的低密度TMPTA泡沫,机械强度可满足核磁内爆靶(Z-pinch)靶装配的需求。
Low density polymer foam is widely used in inertial confinement fusion targets and electromagnetic implosion targets. Using trimethylolpropane triacrylate (TMP-TA) as polymerization monomer and benzoin methyl ether as initiator, the gel was induced by ultraviolet light to obtain TMPTA foam by supercritical drying. The characterization of functional group conversion and foam purity in the TMPTA monomer was confirmed by infrared spectroscopy and elemental analysis. The experimental results show that the conversion of carbon-carbon double bond (C = C) is 40.48% in the vicinity of 1636cm-1 and the foam is a high-purity low density TMPTA foam. The mechanical strength of the foam can meet the requirements of NMR (Z -pinch) target assembly needs.