电子束辐照剂量对PAN/PEO交联度的影响

Electron Beam Irradiation Dose Effects on Crosslinking Degree of PAN/PEO

对PAN／PEO凝胶（5％PAN，5％PEO）在1．0MeV电子束下进行了不同剂量的辐照。红外光谱测量表明，PAN／PEO凝胶辐照后发生了化学交联。分析结果指出，PAN／PEO的凝胶分数随着辐照剂量的增加而不断增加；其凝胶分数增长率的变化可以分为3个阶段，即快速增加阶段f0。39kGy）、下降阶段（39—130kGy）和稳定阶段（〉130kGy）。拟合发现，引入材料刚性参数口的半经验修正方程与未考虑材料刚性的Charlesby—Pinner方程相比，更符合实际测量值（对于该配比PAN／PEO．β为0-166）。交联厦一辐照剂量曲线显示，交联度随辐照剂量的增加而增加，为设计新型能功能材料中所需的固定交联度的PAN／PnO凝胶提供了辐照剂量参考值。

Polyacrylonitrile/polyethylene oxide （PAN/PEO, 5% PAN and 5% PEO） was irradiated by 1.0 MeV electron beam with different doses in this work. FTIR result indicated that PAN/PEO crosslinked after irradiation. It was pointed out by analysis that gel fraction of PAN/PEO increased with EB irradiation dose The increasing rate of gel fraction could be divided into three stages, which were rapidly increasing stage （0- 39 kGy）, decreasing stage （39 - 130 kGy） and stable stage （more than 130 kGy）. Theoretical calculation results showed that the values fitting by half-experience equation presented by Zhang Wanxi were closer to the measured values than Charlesby-Pinner equation fitting ones because of the introduction of rigidity parameter in the half-experience equation （for PAN/PEO,β was 0.166）. The curve of crosslinking degree vs irradiation dose showed that the crosslinking degree increased with the irradiation dose, and it could provide a referential irradiation dose when materials with fixed crosslinking degree were needed in new functional materials.