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UV‐Induced Frontal Polymerization of a Pt‐Catalyzed Hydrosilation Reaction
Author(s) -
Sangermano Marco,
Marchi Sophie,
Ligorio Davide,
Meier Patrick,
Kornmann Xavier
Publication year - 2013
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201300004
Subject(s) - hydrosilylation , polymerization , catalysis , chemistry , polymer chemistry , platinum , photochemistry , reaction mechanism , photopolymer , curing (chemistry) , organic chemistry , polymer
The bis(acetylacetonato)platinum(II) is a common thermal catalyst for the hydrosilation reaction, and it is reported to serve also as a photoactivated catalyst for hydrosilation addition of silanes to alkenes and alkynes. In this paper, it is demonstrated that the UV‐activation of hydrosilation reaction proceeds via a thermal‐frontal mechanism. UV light activates the polymerization on the surface of the sample and, subsequently, the heat released by hydrosilation generates a thermal front, converting the UV‐generated homogeneous catalyst to a Pt 0 heterogeneous catalyst. The UV‐induced frontal polymerization mechanism can exhaustively explain the dark‐curing process observed in the UV‐activated hydrosilation reaction.