Poulose Anesh Manjaly, Shaikh Hamid, Anis Arfat, Alhamidi Abdullah, Kumar Nadavala Siva, Elnour Ahmed Yagoub, Al-Zahrani Saeed M
SABIC Polymer Research Center, Department of Chemical Engineering, King Saud University, Riyadh 11421, Saudi Arabia.
Department of Chemical Engineering, King Saud University, Riyadh 11421, Saudi Arabia.
Polymers (Basel). 2022 Apr 22;14(9):1711. doi: 10.3390/polym14091711.
There is a demand for long afterglow composites due to their potential applications in nighttime signal boards, sensors, and biomedical areas. In this study, Polypropylene (PP)/strontium aluminate-based composites [SrAlO:Eu/Dy (SAO) and SrAlO: Eu, Dy (SAO)] with maleic anhydride grafted PP compatibilizer (PRIEX) were prepared, and their auto-glowing properties were examined. After UV excitation at 320 nm, the PP/5PRIEX/SAO composites showed green emission at 520 nm, and blue emission was observed for PP/5PRIEX/SAO around 495 nm. The intensity of phosphorescence emission and phosphorescence decay was found to be proportional to the filler content (SAO and SAO). The FTIR analysis excluded the copolymerization reaction between the SAO and SAO fillers and the PP matrix during the high-temperature melt mixing process. The SAO and SAO fillers decreased the overall crystallinity of the composites without affecting the T and T (melting and crystallization temperature) values. The thermal stability of the composites was slightly improved with the SAO and SAO fillers, as seen from the TGA curve. Due to the plasticizing effect of the compatibilizer and the agglomeration of the SAO and SAO fillers, the tensile modulus, tensile strength, and storage modulus of the composites was found to be decreased with an increase in the SAO and SAO content. The decreasing effect was more pronounced, especially with the bulk-sized SAO filler.
由于长余辉复合材料在夜间信号板、传感器和生物医学领域的潜在应用，对其存在需求。在本研究中，制备了含有马来酸酐接枝聚丙烯增容剂（PRIEX）的聚丙烯（PP）/铝酸锶基复合材料[SrAlO:Eu/Dy（SAO）和SrAlO:Eu,Dy（SAO）]，并对其自发光性能进行了研究。在320nm紫外光激发后，PP/5PRIEX/SAO复合材料在520nm处呈现绿色发射，而PP/5PRIEX/SAO在495nm左右观察到蓝色发射。发现磷光发射强度和磷光衰减与填料含量（SAO和SAO）成正比。傅里叶变换红外光谱分析排除了在高温熔融混合过程中SAO和SAO填料与PP基体之间的共聚反应。SAO和SAO填料降低了复合材料的整体结晶度，但不影响其熔点和结晶温度值。从热重分析曲线可以看出，SAO和SAO填料使复合材料的热稳定性略有提高。由于增容剂的增塑作用以及SAO和SAO填料的团聚，发现随着SAO和SAO含量的增加，复合材料的拉伸模量、拉伸强度和储能模量降低。这种降低效应更为明显，尤其是对于块状SAO填料。
