Solid state NMR study of poly(methyl methacrylate)/polyvinylpyrrolidone blends

1998 ◽  
Vol 41 (3) ◽  
pp. 307-310 ◽  
Author(s):  
Edemilsom P. da Silva ◽  
Maria Inês B. Tavares
Keyword(s):  
Solid State ◽  
Methyl Methacrylate ◽  
Solid State Nmr ◽  
Poly Methyl Methacrylate ◽  
Nmr Study

scholarly journals Influence of the Ce:YAG Amount on Structure and Optical Properties of Ce:YAG-PMMA Composites for White LED

2016 ◽  
Vol 230 (9) ◽  
Author(s):  
Francesco Armetta ◽  
Motshabi A. Sibeko ◽  
Adriaan S. Luyt ◽  
Delia F. Chillura Martino ◽  
Alberto Spinella ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Methyl Methacrylate ◽  
Solid State Nmr ◽  
White Led ◽  
Blue Led ◽  
Poly Methyl Methacrylate ◽  
Structure And Morphology ◽  
Melt Compounding

AbstractCe:YAG-poly(methyl methacrylate) (PMMA) composites were prepared by using a melt compounding method, adding several amounts of Ce:YAG in the range 0.1–5 wt. %. The optical properties of the obtained composites and of the composites combined with a blue LED were measured to investigate the effect of the amount of Ce:YAG on the resulting emitted light in view of possible application in white LED manufacture. An increase in Ce:YAG amount caused an increase in the emission and a shift of 15 nm, influencing the white LED performance. The structure and morphology of the composites were studied. The results show that the interaction between the two components, observed by using solid state NMR experiments, are the responsible for the observed shift.

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