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Obtainment of Graded Index Preforms by Combined Frontal Co‐Polymerization of MMA and BzMA
Author(s) -
Villegas Armando García,
Ocampo Miguel A.,
LunaBárcenas Gabriel,
SaldívarGuerra Enrique
Publication year - 2009
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200950939
Subject(s) - materials science , composite material , refractive index , copolymer , polymer , monomer , polymerization , polymer chemistry , optoelectronics
Summary . A simple system to obtain preforms with graded refraction index (GI) is presented. Index profiles with cylindrical symmetry are developed by introduction of a uniform rod of Poly Methylmethacrylate (65%)‐co‐Benzilmethacrylate (35%) (Poly‐(MMA‐ co ‐BzMA)) during mass copolymerization of an 80% MMA – 20% BzMA solution of the same monomers. The obtained preforms present a gradual variation of the refraction index with approximate radial symmetry. Dripping of the central bar produces moderate variations of the index profile along the preform axis, but a large enough fraction of the obtained preforms have potential to produce graded index (GI) polymer optical fibers (POF) by subsequent drawing and to obtain flat polymeric lenses by slicing.