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DOI: 10.5445/IR/1000081492

Optical and Thermomechanical Properties of Doped Polyfunctional Acrylate Copolymers

Hanemann, Thomas; Honnef, Kirsten

Three different polyfunctional acrylate monomers-trimethylolpropantriacrylate (TMPTA), pentaerythritol triacrylate (PETA) and di(trimethylolpropane) tetraacrylate (DTTA)-have been used as comonomers in combination with a reactive resin consisting of poly(methylmethacrylate), dissolved in its monomer methylmethacrylate. Phenanthrene has been added to form a guest-host system. The level of phenanthrene present may be adjusted to tailor the refractive index in the system. Prior to curing, the shear rate and temperature-dependent viscosity as a function of the composition were measured. It could be demonstrated that, with respect to different shaping methods, a tailor-made flow behaviour can be adjusted. After thermally-induced polymerization, the resulting optical (refractive index, optical transmittance) and thermomechanical (glass transition behavior, Vickers hardness) properties were characterized. A significant refractive index increase-up to a value close to 1.56 (@589 nm)-under the retention of good optical transmittance was able to
be obtained. In addition, the photopolymerization behaviour was investigated to overcome the unde ... mehr

Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2073-4360
URN: urn:nbn:de:swb:90-814924
KITopen ID: 1000081492
Erschienen in Polymers
Band 10
Heft 3
Seiten Art.Nr. 337
Schlagworte refractive index tailoring, optical transmittance, polymer waveguides, photoinitiated, curing, photopolymerization, UV-curing
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