高分辨溶液~(13)C核磁共振(NMR)已经成功地应用于测定聚乙烯高能辐射所产生的交联点结构的类型和数目.在合适的条件下,其检测灵敏度可达万分之0.5个结构单元.聚乙烯的光引发交联近年来已被广泛研究,其光引发交联过程中所产生的自由基中间体已用自旋捕捉结合电子自旋共振技术进行了观测和鉴定,并推测了在聚乙烯熔融态光交联条件下H型交联点可能占主导地位.然而,我们尚未得到直接和定量的证据来证实这一推论,而且至今尚未见聚乙烯光交联点的~(13)C NMR研究的报道.因此,我们一直有着极大的兴趣在于 High resolution solution ~ (13) C nuclear magnetic resonance (NMR) has been successfully used to determine the type and number of cross-linked point structures produced by polyethylene high energy radiation. Under appropriate conditions, its detection sensitivity can reach 0.5% It has been widely studied in recent years that the photo-initiated cross-linking of polyethylene has been extensively studied. The free-radical intermediates produced by photo-initiated cross-linking have been observed and identified by spin-trapping combined with electron spin resonance However, we have not yet been able to confirm this corollary by direct and quantitative evidence, and so far no (~ 13) C NMR research reports, therefore, we have always had a great interest lies