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UV‐activated silicone oligomer cross‐linking through photoacid and photobase organocatalysts
Author(s) -
Chemtob Abraham,
PazSimon Héloïse,
CroutxéBarghorn Céline,
Rigolet Séverinne
Publication year - 2014
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.39875
Subject(s) - oligomer , polymer chemistry , silicone , condensation polymer , materials science , curing (chemistry) , chemistry , silanol , photochemistry , catalysis , organic chemistry
Diphenyl iodonium hexafluorophosphate salt and N ‐alkyl morpholino acetophenone were shown to be effective photocatalyst generators for the cross‐linking of α,ω‐silanol terminated silicone oligomers. These two photoacid and photobase‐induced polycondensation pathways provided an attractive and efficient alternative to toxic and expensive organometallic catalysts. The utility of this novel UV‐curing process was demonstrated with a combination of time‐resolved infrared spectroscopy to follow the fast reaction kinetics and solid‐state 29 Si nuclear magnetic resonance to investigate the polysiloxane network. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 39875.