Guanghui Li, Jinyan Wang, Su Guixian
Nov 1, 2010
Citations
0
Influential Citations
7
Citations
Journal
Polymer Journal
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 °C in the presence of a free radical initiator dicumyl peroxide under vacuum or at 280 °C in the absence of any initiator under vacuum. The polymers had high glass transition temperatures in the range 164–269 °C, which could be further increased by about 10 °C on thermal crosslinking. The crosslinked polymers had good thermal stabilities (the temperatures of 1% mass loss after curing ranged from 478 to 490 °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. A series of novel fluorinated crosslinkable poly(phthalazinone ether)s, bearing tetrafluorostyrene groups (FSt-FPPEs), have been prepared by polycondensation. The structures were identified using 1H-NMR and infrared spectroscopy measurements. The resulting polymers could be thermally crosslinked either at 160 °C in the presence of a free radical initiator dicumyl peroxide under vacuum or at 280 °C in the absence of any initiator under vacuum. The refractive indices of the crosslinked polymers could be well controlled over a wide range; crosslinked polymers also show low optical losses at 1550 nm. These results indicate that the application of FSt-FPPE in the field of optical waveguide seems feasible and promising.