Hits:

Indexed by:期刊论文

Date of Publication:2012-05-01

Journal:POLYMER INTERNATIONAL

Included Journals:SCIE、EI、Scopus

Volume:61

Issue:5

Page Number:711-718

ISSN No.:0959-8103

Key Words:polymer optical waveguide; photo-crosslinking; fluorinated poly(aryl ether); phthalazinone

Abstract:A series of novel photo-crosslinkable fluorinated poly(phthalazinone ether)s containing 1,1-diphenylethylene segments in the polymer main chain, used for optical waveguide materials, were synthesized by polycondensation reaction of decafluorobiphenyl with a mixture of 4-(4-hydroxylphenyl)(2H)-phthalazin-1-one (DHPZ), 4,4-(hexafluoroisopropylidene)diphenol and 1,1-bis(4-hydroxyphenyl)ethylene (BHPE) as co-reactant. The feed ratio of DHPZ to total bisphenols varied from 0 to 80 mol%, while that of BHPE remained at 20 mol% for all polymers. The obtained copolymers show good solubility in some common polar organic solvents. The resulting polymers were photo-crosslinked after UV irradiation for 10 min in the presence of a photoinitiator. The cured polymers show good chemical resistance, high thermal stability (temperatures of 1% mass loss after curing of 472496 degrees C under nitrogen) and high glass transition temperatures (160249 degrees C) which could be further increased by about 10 degrees C after photochemical crosslinking. By adjusting the copolymerizing bisphenol content, the refractive indices of transverse electric and transverse magnetic modes (at 1550 nm) of films of the polymers were exactly tuned in the range 1.50291.5661 and 1.49501.5502, respectively. The propagation losses of the cured films were measured and found to be less than 0.3 dB cm-1 at 1550 nm, indicating the promise of these materials for passive optical waveguide devices. Copyright (c) 2011 Society of Chemical Industry