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Indexed by:期刊论文

Date of Publication:2010-11-01

Journal:POLYMER JOURNAL

Included Journals:SCIE、EI、Scopus

Volume:42

Issue:11

Page Number:880-886

ISSN No.:0032-3896

Key Words:crosslinking; fluorinated poly(arylene ether); phthalazione; polymer optical waveguide

Abstract:A series of novel fluorinated crosslinkable poly(phthalazinone ether)s bearing tetrafluorostyrene groups (FSt-FPPEs) was prepared by polycondensation from 4-(4'-hydroxyphenyl)-phthalazin-1(2 H)-one (DHPZ), decafluorobiphenyl, 4,4-(hexafluoroisopropylidene) diphenol (6F-BPA) and pentafluorostyrene (FSt) for optical waveguide applications. The obtained polymers exhibited good solubility in common organic solvents and could be easily cast into optical-quality thin films. The resulting polymers could be thermally crosslinked either at 160 degrees C in the presence of a free radical initiator dicumyl peroxide under vacuum or at 280 degrees C in the absence of any initiator under vacuum. The polymers had high glass transition temperatures in the range 164-269 degrees C, which could be further increased by about 10 degrees C on thermal crosslinking. The crosslinked polymers had good thermal stabilities (the temperatures of 1% mass loss after curing ranged from 478 to 490 degrees C) and high glass transition temperatures. The crosslinked polymer films also exhibited good optical properties. By adjusting the feed ratio of the reactants, the refractive indices of transverse electronic and transverse magnetic modes (at 1550 nm) could be controlled well in the range of 1.4952-1.5625 and 1.4924-1.5538, respectively. The optical losses of the crosslinked polymers were rather low, <0.3 dB cm(-1) at 1550 nm. Polymer Journal (2010) 42, 880-886; doi: 10.1038/pj.2010.85