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. 2022 Apr 22;14(9):1711.
doi: 10.3390/polym14091711.

Effect of Compatibilizer on the Persistent Luminescence of Polypropylene/Strontium Aluminate Composites

Anesh Manjaly Poulose  1 , Hamid Shaikh  1 , Arfat Anis  1 , Abdullah Alhamidi  1 , Nadavala Siva Kumar  2 , Ahmed Yagoub Elnour  2 , Saeed M Al-Zahrani  1
Affiliations

Effect of Compatibilizer on the Persistent Luminescence of Polypropylene/Strontium Aluminate Composites

Anesh Manjaly Poulose et al. Polymers (Basel). .

Abstract

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 [SrAl2O4:Eu2+/Dy3+ (SAO1) and Sr4Al14O25: Eu+2, Dy+3 (SAO2)] 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/SAO1 composites showed green emission at 520 nm, and blue emission was observed for PP/5PRIEX/SAO2 around 495 nm. The intensity of phosphorescence emission and phosphorescence decay was found to be proportional to the filler content (SAO1 and SAO2). The FTIR analysis excluded the copolymerization reaction between the SAO1 and SAO2 fillers and the PP matrix during the high-temperature melt mixing process. The SAO1 and SAO2 fillers decreased the overall crystallinity of the composites without affecting the Tm and Tc (melting and crystallization temperature) values. The thermal stability of the composites was slightly improved with the SAO1 and SAO2 fillers, as seen from the TGA curve. Due to the plasticizing effect of the compatibilizer and the agglomeration of the SAO1 and SAO2 fillers, the tensile modulus, tensile strength, and storage modulus of the composites was found to be decreased with an increase in the SAO1 and SAO2 content. The decreasing effect was more pronounced, especially with the bulk-sized SAO2 filler.

Keywords: compatibilizer; phosphorescent composites; thermal and mechanical.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
ATR-FTIR data of PP/PRIEX/SAO1 (A) and PP/PRIEX/SAO2 (B) composites.
Figure 2
Figure 2
TGA results of PP/PRIEX/SAO1 (A) and PP/PRIEX/SAO2 (B) composites.
Figure 3
Figure 3
The tensile strength (A) and tensile modulus (B) of PP/PRIEX/SAO1 and PP/PRIEX/SAO2.
Figure 4
Figure 4
The SEM pictures were taken on PP/PRIEX/10 SAO1 (A) and PP/PRIEX/10SAO2 (B).
Figure 5
Figure 5
The storage modulus of PP/PRIEX/SAO1 (A) and PP/PRIEX/SAO2 (B) composites.
Figure 6
Figure 6
The phosphorescence emission spectra of PP/5PRIEX/SAO1 (A) and PP/5PRIEX/SAO2 (B) composites.
Figure 7
Figure 7
The green and blue emission decay at different times for PP/5PRIEX/10SAO1 and blue PP/5PRIEX/10 SAO2 composites (after excited in outside sunlight for 10 min and kept in a dark room).
Figure 8
Figure 8
The phosphorescence intensity decay with time for PP/PRIEX/SAO1 (A) and PP/PRIEX/SAO2 (B) composites.
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