尼龙-1010的增强辐射交联  

Enhanced irradiation crosslinking of Nylon-1010

作　　者：李志宏[1] 王君林[2] 张利华[3] 陈欣方[1] 

机构地区：[1]吉林大学材料科学与工程学院,长春130012 [2]中国科学院长春光学精密机械与物理研究所,长春130022 [3]中国科学院长春应用化学研究所,长春130022

出　　处：《辐射研究与辐射工艺学报》2007年第5期257-260,共4页Journal of Radiation Research and Radiation Processing

基　　金：国家863计划(2002AA304010)资助

摘　　要：用凝胶测定技术及广角X射线衍射(Wide angle X-ray diffraction,WAXD)等方法研究了尼龙-1010与添加了交联剂4,4′—双马来酰亚胺二苯甲烷(4,4′-Bismaleimideodephenylmathan,BMI)的尼龙-1010的辐射交联规律,试样的交联G值,结晶结构随吸收剂量的变化,讨论了交联剂存在下辐照对结晶损伤的影响。结果表明,多官能团单体的存在,不仅增强了辐射交联结构的生成,同时也促进了其结晶结构的辐射损伤,损伤的初始剂量减小。BMI单体主要存在于界面区,抑制应力键裂解、加强了界面交联,进一步导致结晶表面缺陷的积累和结晶度W_c下降,表明辐射损伤由晶面开始而逐步向结晶内部伸入。结晶度W_c、微晶尺寸L_(hkl)与剂量D关系表明,辐照初期W_c及L_(hkl)的增加与应力链断裂、氢键作用下分子链段重排有关,高吸收剂量的W_c与L_(hkl)的变化率与结晶比表面大小相关,010面较100面更易受损伤。By the methods of gel determination and WAXD （Wide Angle X-ray diffraction）, the irradiation crosslinking rule of PA1010 and PA1010 containing multifunctional crosslinking agent BMI, the changing of G（x） and the degree of crystallisity of samples with the absorbed doses has been studied. The effect of irradiation on the destruction of crystalline is also explored. It has been shown that multifunctional crosslingking agent not only improves irradiation crosslinking structure, but also accelerates and cut down the doses for the origination destruction of crystalline. As itexists mainly in the interface region, BMI can restrain decomposing of stress bond, enhance the interface crosslinking, and result in the accumulation of defects on the surface of the crystal and the descending of Wc, which indicates that irradiation damage occurs gradually from the surface to the inside of the crystal. In the studies of Wc, Lhkl and D, it has been found that the increasing of Wc and Lhkl during early stage of irradiation has some relationship with the strain rearrangement caused by hydrogen bond and the breaking of stress bond, meanwhile changing rates of We and Lhkl at high irradiated dosage are correlative to amount of ratio surface of crystal, and face 010 is easier to be damaged than face 100.

关 键 词：辐射交联 增强交联 尼龙-1010 结晶损伤 

分 类 号：O631.3[理学—高分子化学] O631.34[理学—化学]