聚烯烃纤维表面光接枝的ESCA表征

CHARACTERIZATION OF PHOTOGRAFTED SURFACE OF HSPE FIBER BY ESCA

以UV(320～440nm)为光源,二苯甲酮(BP)为光引发剂,丙烯酸(AA)和丙烯酰胺(AM)为单体,在高强度聚乙烯(HSPE)纤维上进行表面光化学接枝反应。由于纤维表面接枝仅发生在小于50(?)的极薄层内,表面接枝率无法用通常的称重法测定,因而无法用通常意义的重量接枝率来表征。本文用X射线光电子能谱(ESCA)对接枝纤维分析,以氮原子的1S壳层电子和碳1S壳层电子的峰积分强度之比值,N_(1S)/C_(1S),来表征产物的表面接枝程度,以傅里叶红外内反射光谱(FTIR)进行测定佐证。对接枝纤维进行粘接性和染色性测试结果也表明,用ESCA的N_(1S)/C_(1S)积分强度相对比(RI％)来表征上述接枝程度是合宜的。

Surface grafting of acrylic monomers onto High Strength Polye thylene (HSPE) fibre has been achieved by means of a photoinitiated continuous process, with a UV lamp (320～440nm)as a radiation source and benzophenone a photoinitiator. It is difficult, however, to measure such a thin layer of grafts by the commonly used weighing method. The degree of surface grafts can be characterized by Electron Spectroscopy for Chemical Application(ESCA). The relative integral intensities of the ESCA core electron lines, oxygen and nitrogen to carbon, O_1s/C_1s and N_1s/C_1s, are used to indicate the relative degree of grafting of acrylic acid (AA) and acrylamide (AM) as monomers, respectively.The determination of the grafting by Fourier Transform infrared spectroscopy (FTIR) (ATR method) and 'dyeability' as well as adhesion to epoxy resin for the grafted HSPE fibre are compared with those by ESCA, indicating that the relative integral intensity of ESCA core electron lines, RI%, is apt to characterize relatively the degree of surface grafts of HSPE fiber.