聚碳酸酯材料的辐射老化  

Radiolysis aging study of polycarbonate

作　　者：杨强[1] 熊国刚[1] 孙朝明[1] 袁明康[1] 关垲[1] 

机构地区：[1]中国工程物理研究院机械制造工艺研究所,绵阳621900

出　　处：《辐射研究与辐射工艺学报》2007年第2期89-94,共6页Journal of Radiation Research and Radiation Processing

摘　　要：应用拉伸强度测试(Tensile strength testing,TST)、扫描电镜(Scanning electronic micrograph,SEM)断口形貌分析、差示扫描量热分析(Differential scanning calorimetry,DSC)、富立叶变换红外光谱(Fourier transform infrared absorbption spectroscopy,FTIAS)、凝胶渗透色谱(Gel permeation chromatography,GPC)、X射线光电子能谱(X-Ray photoelectron spectroscopy,X-RPS)等多种手段研究了聚碳酸酯材料在γ射线辐照下的老化行为。结果表明,聚碳酸酯材料的力学性能、玻璃化温度、分子量和数均聚合度均随吸收剂量的增加而下降;其断口表面的光滑程度随吸收剂量的增加而增大;只观察到结构上微小的变化;动力学分析表明其辐射降解属于无规降解类型。间接证明了聚碳酸酯在0-12MGy剂量范围内辐射降解机理占优势。Aging behaviors of polycarbonate under gamma irradiation were investigated by mechanical testing, scanning electron microspectroscopy, differential scanning calorimetry, Fourier transform infrared spectroscopy, gel permeation chromatography and X-ray photoelectron spectroscopy. The results show that tensile strength, glass transition temperatures, molecular weights and number averaged polymerization degree of the polycarbonate decreased with the dose. The smooth degree of fracture surface increased with the dose. Radiation degradation kinetics revealed that the degradation of polycarbonate under gamma irradiation is random degradation.

关 键 词：聚碳酸酯 辐射老化 Γ辐射 

分 类 号：O571.33[理学—粒子物理与原子核物理] O621.25[理学—物理]