Phototriggered Base Proliferation: A Highly Efficient
Domino Reaction for Creating Functionally Photo-Screened Materials
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Abstract
Phototriggered
base proliferation as a highly efficient domino reaction is presented
for creating functionally photo-screened materials, providing a strategy
for the photopolymerization of shadow areas via chemically diffuse
amines toward the nonirradiated areas during polymerization. By integrating
proliferated amines with a peroxide initiator (dibenzoyl peroxide,
BPO), phototriggered self-propagating polymerization of acrylate monomers
in three-dimensional space was achieved. The advantages of this approach
lie in its enhanced photosensitivity, increased propagating velocity,
and elevated double-bond conversion (90%) while reducing the local
high temperature and the minimum BPO concentration that sustain a
traveling front. Astonishingly, the propagating velocity and local
maximum temperature can be well-modulated by varied BPO concentration
and the appropriate amount of BA-BPD (1-(9-fluorenylmethoxycarbonyl)-4-benzylpiperidine)
concentration, respectively. Finally, functionally photo-screened
material containing carbon nanotubes was successfully prepared by
phototriggered base proliferation reactions