PP-g-MAEu离聚物的合成与表征

Synthesis and Characterization of PP-g-MAEu Ionomer

以过氧化二异丙苯(DCPO)为引发剂,将马来酸铕(MAEu)熔融接枝到聚丙烯上,合成不同接枝率的PP g MAEu离聚物,考察了反应时间、引发剂浓度、单体用量对接枝率的影响,在离聚物的1540～1643cm-1之间的宽峰说明MAEu与PP发生了接枝反应;利用WAXD,POM和DSC考察了PP及其接枝物的结晶行为,PP g MAEu能促进β 型结晶的形成,接枝物的起始结晶温度移向高温,结晶速率加快,接枝物形成的球晶尺寸变小,而且球晶不规整;荧光光谱的结果表明PP g MAEu离聚物是一种单色性好、亮度高的稀土高分子光致发光材料。

The melt grafting of MAEu onto polypropylene was studied. The effects of reaction time, concentration of MAEu and DCPO on the degree of grafting were examined. The grafted copolymer was determined by FTIR. The crystallization behavior of PP and its graft copolymers was studied by WAXD, POM and DSC. The results indicate that the graft group can induce PP to form βtype crystal, and its spherical crystal becomes smaller and imperfect. The graft copolymers are easy to crystallize at higher temperature. The fluorescence spectra results indicate PPgMAEu is a kind of photoluminescence material. Characteristic red fluorescence with high brightness and good singlecolor property was emitted under ultraviolet ray excitation.