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Indexed by:期刊论文

Date of Publication:2014-02-01

Journal:OPTICAL MATERIALS

Included Journals:SCIE、EI、Scopus

Volume:36

Issue:4

Page Number:804-808

ISSN No.:0925-3467

Key Words:Poly(isobornyl methacrylate); Cross linking; Film; Optical property

Abstract:Novel crosslinked poly(IBOMA-co-BA) copolymers were prepared by free-radical copolymerization from isobornyl methacrylate (IBOMA) and butyl acrylate (BA), using 4,4'-isopropylidenediphenol dimethacrylate (BD) as crosslinking agent and 2,2'-azobisisobutyronitrile (AIBN) as thermal initiator. The chemical structures, physical and optical properties of the resultant copolymers were characterized by FTIR, H-1 NMR, differential scanning calorimetry, thermogravimetry analysis, refractive index and birefringence measurements. It was found that the crosslinking modification could effectively improve the resistance to organic solvents, and significantly increase the glass transition temperatures and thermal stability of the copolymers. More importantly, the transparent copolymer films with three-dimensional network structures exhibited very low birefringence. In addition, with the incremental increase of the BD content in copolymers from 15 wt% to 60 wt%, the refractive indices of films could be tunable over a range of 1.475-1.546. The excellent chemical resistance, thermal and optical properties endow this series of polymer materials with promising application in light-waveguide device field. (C) 2013 Elsevier B.V. All rights reserved.