γ-辐照对高密度聚乙烯-尼龙-6共混物结构和性能的影响  

Structure and Property of High-Density Polyethylene-Polyamide-6 Blend Irradiated by γ-ray

作　　者：丁运生[1] 张志成[2] 

机构地区：[1]合肥工业大学化工学院,安徽合肥230009 [2]中国科技大学化学与材料学院,安徽合肥230026

出　　处：《核化学与放射化学》2006年第2期86-89,共4页Journal of Nuclear and Radiochemistry

基　　金：教育部博士点基金资助项目(2000035805)

摘　　要：用熔融共混的方法制备出高密度聚乙烯(HDPE)和尼龙-6(PA-6)的共混物,研究了共混物经γ射线辐照后结构与性能的改变。扫描电镜(SEM)观察结果表明,γ射线辐照会影响共混物的相态结构;辐照4 h后,共混物样品的吸收剂量为15.84 kGy;PA-6和HDPE的界面粘结力增强,两相之间有明显的界面过渡层的存在,材料的相容性增加;随着辐照时间延长,材料结构破坏。经γ射线辐照后,共混材料的冲击强度下降,拉伸强度与断裂伸长率增加,其中断裂伸长率增加明显。共混材料经辐照后对二甲苯的吸收减小。High-density polyethylene （HDPE） and polyamide-6 （PA 6） blends were prepared by melting 80 ： 20 blends and samples of the blends were irradiated in air with γ-ray. Effects of γ-ray irradiation on the structure and properties of the blends were investigated. On the basis of morphologies obtained by the scanning electron microscope （SEM）, mechanical properties and absorption ratio test results, it has been shown that the phase structure of the blend that has undergone γ-ray irradiation is different from the un-irradiated blend, and there are positive changes in the barrier properties, tensile strength and elongation at break, but the impact strength is decreased while the blend has been irradiated for 4 h （absorbed dose is 15.84 kGy）. In all samples, the one that has been irradiated in air with γ-ray for 4 h has the lowest absorption ratio of xylene, while the one undergone 7 h irradiating process （absorbed dose is 27.72 kGy） has the best mechanical properties. As the structure of the blend gradual ly destroyed with increasing the irradiation dose to the blend, the mechanical properties de creased apparently.

关 键 词：HDPE PA-6 γ射线辐照 相态结构 力学性能 吸油率 

分 类 号：O631.34[理学—高分子化学]