ISSN:
1572-8870
Keywords:
Poly[bis(4-isopropylphenoxy)0.8 (4-benzoylphenoxy)1.2 phosphazene]
;
photochemical behavior
;
solution
;
solid state
;
photo-cross-linking
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The synthesis and photochemical behavior both in solution and in the solid state of poly[bis(4-isopropylphenoxy)0.8 (4-benzoylphenoxy)1.2 phosphazene] is described. The main reaction of this material under illumination with light of a wavelength longer than 340 nm is the intramolecular abstraction of an hydrogen atom by the excited benzophenone substituent from the 4-isopropylphenoxy moiety geminally substituted on the same phosphorus of the phosphazene chain. In this way highly reactive radical species are produced which induce very efficient photo-cross-linking of the phosphazene copolymer and insolubilization. The efficiency of this process in the solid state is examined in view of the potential application of this material as a polyphosphazene-based negative photoresist.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00777250
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