尼龙-1010的增强辐射交联

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Wc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Wc、微晶尺寸Lhkl与剂量D关系表明,辐照初期W1c及Lhkl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Wc与Lhkl的变化率与结晶比表面大小相关,010面较100面更易受损伤.

Enhanced irradiation crosslinking of Nylon-1010

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 im- proves 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 in- terface crosslinking,and result in the accumulation of defects on the surface of the crystal and the descending of W_c, which indicates that irradiation damage occurs gradually from the surface to the inside of the crystal.In the studies of W_c,L_(hkl)and D,it has been found that the increasing of W_c and L_(hkl)during early stage of irradiation has some relation- ship with the strain rearrangement caused by hydrogen bond and the breaking of stress bond,meanwhile changing rates of W_c and L_(hkl)at high irradiated dosage are correlative to amount of ratio surface of crystal,and face 010 is eas- ier to be damaged than face 100.