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Novel synthesis of polyimides of the third‐order optical nonlinearities by microwave assistance
Author(s) -
Lu JianMei,
Ji ShunJun,
Chen NaiYong,
Zhang ZhengBiao,
Sun ZhenRong,
Zhu XiuLin,
Shi WeiPing
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.11494
Subject(s) - pyromellitic dianhydride , microwave , materials science , polymer , polymer chemistry , polymerization , picosecond , monomer , degenerate energy levels , polymer science , optoelectronics , optics , composite material , polyimide , physics , telecommunications , computer science , laser , layer (electronics) , quantum mechanics
The third‐order optical nonlinearities and time responses of three new polymeric materials, which were prepared by polymerization of benzoguanamine (BGA) and pyromellitic dianhydride (PMDA), m,m ′‐diaminobenzophenone ( m,m ′‐DABP) and PMDA, BGA, and 2,4‐tolylenediisocyanate (TDI) under microwave radiation, were measured by a picosecond forward three‐dimensional degenerate four‐wave mixing technique. The experimental results showed that nonresonant optical nonlinearity [χ (3) ] of the three polymers is larger by microwave than by heating and that third‐order optical nonlinearities were not only affected by the length of polymer chain, but also by the polymer chain structure. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 87: 1739–1747, 2003