Abstract:
Strontium aluminate phosphor (SrALO:Eu) filled luminatcented-thermoplastic natural rubbers (TPNRs) based on blending of natural rubber, polypropylene, and propylene-ethylene copolymer (NR/PP/PEC) were prepared using internal mixer. Influence of blending technique and mixing method was investigated. Results reveal that the TPNRS prepared by dynamic vulcanization technique with precompound method and addition of phosphor an initial (1) step of mixing showed the best mechanical (both before and after heat ageing), luminescent and morphological properties. Moreover, effect of various blend proportions between PP and PEC in the
ternary NR/PP/PEC TPNRs was studied and the NR content was fixed at 40% by weight. It can be concluded that using PEC in combination with PP could enhance tensile strength of the TPNRs. Furthermore, elongation at break, elasticity, and light Ulingati
emission of the TPNRS continually inually increased with increasing the PEC contents in
did not significantly change. blend proportion. Whilst, distribution of musi QT 9 Day uphor content was also phosphor content obviously
Pattaen nvestigated. It was found that increasing luminescent properties of the TPNRs together with decreased particle size of vulcanized NR. However, it also impacted on difficulty of the TPNRs process as seen from raising of mixing torque and rheological property. Addition of the phosphor higher than 12% weight of the mixture deteriorated mechanical properties of the TPNRs. In addition, influence of titanium dioxide combined with phosphor on properties of TPNRs was studied. Results demonstrate
that incorporation of titanium dioxide negatively affected on function of phosphor in particular luminescence properties and decay time of the TPNRs.