期刊
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
卷 50, 期 7, 页码 1254-1260出版社
WILEY
DOI: 10.1002/pola.25915
关键词
crosslinking; electro-optic polymer; high-glass transition temperature; hyperbranched; NLO; post-functionalization; temporal stability
资金
- Global Centers of Excellence of Ministry of Education, Culture, Sports, Science and Technology, Japan
- Grants-in-Aid for Scientific Research [19675004] Funding Source: KAKEN
A methacrylate-based crosslinking hyperbranced polymers have been synthesized through initiator-fragment incorporation radical polymerization and used for the temperature stable electro-optic (EO) polymer application. This polymer consists of methyl methacrylate, 2-metacryloxyethyl isocyanate, and ethylene glycol dimethacrylate (EGDMA) monomers. The use of EGDMA as a bifunctional unit resulted in the solvent-soluble crosslinking hyperbranched chain, so that the EO polymer enhanced glass transition temperatures. A phenyl vinylene thiophene vinylene bridge nonlinear optical chromophore was attached to the polymer backbone as the side-chain by a post-functionalization reaction. The loading concentration of the chromophore was varied between 30 and 50 wt % by simply changing the mixing ratio of the precursor polymer to the chromophore. The synthesized EO polymers produced optical quality films with a light propagation loss of 0.61 dB/cm in a slab waveguide at 1.31 mu m. The electrically poled film had an EO coefficient (r33) of 139 pm/V at 1.31 mu m. The EO crosslinking hyperbranced polymer had a high-glass transition temperature of 170 degrees C, and exhibited excellent temporal stability of the EO activity at 85 degrees C for 500 h. (c) 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012
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