聚乙烯冲击压缩特性实验研究  

Experimental study on shock compression properties of polyethylene

作　　者：黄秀光[1] 傅思祖[1] 舒桦[1] 叶君建[1] 吴江[1] 谢志勇[1] 方智恒[1] 贾果[1] 罗平庆[2] 龙滔[2] 何钜华[1] 顾援[1] 王世绩[1] 

机构地区：[1]上海激光等离子体研究所,上海201800 [2]北京应用物理与计算数学研究所,北京100088

出　　处：《物理学报》2010年第9期6394-6398,共5页Acta Physica Sinica

基　　金：国家高技术研究发展计划(批准号:2008AA8040202)资助的课题~~

摘　　要：利用神光Ⅱ装置第九路输出的倍频激光,采用直接驱动方式研究了聚乙烯(CH2)材料的冲击压缩特性.实验表明聚乙烯冲击波阵面自发辐射较强,冲击波在聚乙烯台阶中的传播比较稳定.采用阻抗匹配方法,以铝作标准材料,测量了聚乙烯的冲击绝热线,聚乙烯冲击压强达0.54TPa,冲击波速度测量相对扩展不确定度～2%(K=2),实验数据的一致性较好,与已有低压实验数据及状态方程解析模型比较符合.Shock compression properties of polyethylene （CH2） were studied at SG-Ⅱ laser facility. The experimental results show that the self-emission is high,which emits from the shock-front in polyethylene. And the shock-front propagates through the polyethylene step almost with constant velocity. The Hugoniot equation of state （EOS） of polyethylene was measured by using the impedance-matching method with aluminum as standard material. Pressures are high up to 0. 54 TPa in polyethylene,and the relative expanded uncertainties of the measured shockwave velocity are about 2% （K = 2）. Moreover,the consistency of our data is good,and our data are also consistent with existing experimental data and EOS model.

关 键 词：聚乙烯 冲击绝热线 自发辐射 倍频激光 

分 类 号：TL632.1[核科学技术—核技术及应用]